JP2013025168A - Adapter, camera system and adapter control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter which can functionalize various types of optical systems appropriately for a lens interchangeable type camera system.SOLUTION: An adapter comprises: a first mount unit to/from which a camera body is attachable and detachable; a second mount unit which is provided independently of the first mount unit, and to/from which an interchangeable lens is attachable and detachable; and an adapter control unit to perform first periodic communication with a lens control unit in the interchangeable lens attached to the second mount unit in a first communication cycle and to perform second periodic communication with a camera control unit in the camera body attached to the first mount unit in a second communication cycle. The adapter control unit communicates multiple times with the lens control unit in the first periodic communication and acquires first information from the lens control unit in each communication, and generates second information to be transmitted to the camera control unit in the second periodic communication using the plural pieces of first information acquired in different time in the plural pieces of first information acquired in multiple communication.

Description

  The present invention relates to an adapter, a camera system, and an adapter control program.

There is an interchangeable lens type camera system that includes a camera body and an interchangeable lens that can be attached to and detached from the camera body (see, for example, Patent Document 1).
In this interchangeable lens camera system, it is possible to capture images through various types of optical systems by changing the interchangeable lens mounted on the camera body.

JP 2008-275890 A

In recent years, in a digital camera system, a new lens interchangeable camera system has been developed in which the size of the camera body is smaller than before.
However, the camera body of this new interchangeable lens camera system may not be able to function by attaching the interchangeable lens of the existing camera system.
By the way, existing interchangeable lenses are generally widely used. Therefore, in a new interchangeable lens type camera system, in order to enable imaging through various types of optical systems, it is desirable that an existing interchangeable lens can be mounted and functioned. ing.

  The present invention has been made in view of such circumstances, and an object thereof is an adapter, a camera system, and adapter control capable of appropriately functioning various types of optical systems in an interchangeable lens camera system. To provide a program.

The present invention has been made to solve the above-described problems. The present invention provides a first mount portion to which a camera body can be attached and detached, and a first mount portion that is provided separately from the first mount portion, and to which an interchangeable lens can be attached and detached. The first periodic communication is executed in a first communication cycle between the 2 mount unit and the lens control unit in the interchangeable lens mounted on the second mount unit, and the mounted on the first mount unit. An adapter control unit that executes second regular communication with the camera control unit in the camera body in a second communication cycle, and the adapter control unit communicates with the lens control unit in the first regular communication. A plurality of times of communication is performed, and first information is acquired from the lens control unit every time. Among the plurality of first information acquired by the plurality of times of communication, a plurality of times acquired at different times Using the first information An adapter, characterized in that to generate the second information to be transmitted to the camera control unit in the serial second periodic communication.
According to another aspect of the present invention, there is provided a camera system comprising: the adapter described above; the camera body attached to the first mount; and the interchangeable lens attached to the second mount. is there.
The present invention also provides an adapter control provided in an adapter having a first mount part to which a camera body can be attached and detached, and a second mount part that is provided separately from the first mount part and to which an interchangeable lens can be attached and detached. An adapter control program for controlling the operation of the camera unit, the first step of executing a first periodic communication with the lens control unit in the interchangeable lens in a first communication cycle, and the camera control in the camera body A second step of executing the second regular communication with the unit at a second communication cycle, and a plurality of communications with the lens control unit in the first regular communication, and the lens every time. A third step of acquiring first information from the control unit and a plurality of the first information acquired at different times among the plurality of first information acquired by the plurality of communications in the third step. With a adapter control program and having a fourth step of generating second information to be transmitted to the camera control unit in the second periodic communication.

  According to the present invention, various types of optical systems can appropriately function in an interchangeable lens camera system.

It is a perspective view which shows the structure of the camera system by one Embodiment of this invention. It is a perspective view which shows an example of a structure of the adapter by this embodiment. It is a schematic block diagram which shows the 1st example of a structure of the camera system by this embodiment. It is a schematic block diagram which shows an example of a structure of an adapter power supply part and a power supply system. It is a schematic block diagram which shows the 2nd example of a structure of the camera system by this embodiment. It is a schematic block diagram which shows the 3rd example of a structure of the camera system by this embodiment. It is a schematic block diagram which shows the 4th example of a structure of the camera system by this embodiment. It is a flowchart which shows the outline | summary of the state transition of the process which concerns on the interchangeable lens by this embodiment. It is a figure which shows an example of the communication sequence of command data communication in a lens regular process. It is a figure which shows an example of the communication command divided and communicated in multiple times within 1 lens regular communication. It is a figure which shows an example of the communication sequence which detects the drive state of an optical system drive part. It is a figure which shows an example of the process sequence of a lens starting process. It is a figure which shows an example of the process sequence of the initialization process in a lens starting process. It is a figure which shows an example of the data structure of the initialization information by command data communication. It is a figure which shows an example of the process sequence of a power-supply-cutoff process and a sleep process. It is a figure which shows an example of the process sequence at the time of a power supply interruption.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a configuration of a camera system 1 according to an embodiment of the present invention.
A camera system 1 shown in FIG. 1 is an interchangeable lens camera system, and is provided between a camera body 100, an interchangeable lens 200, and the camera body 100 and the interchangeable lens 200. The adapter 300 is detachably fixed to each other.
In this figure, the adapter 300 is attached to the camera body 100. The interchangeable lens 200 is attached to the camera body 100 via the adapter 300.

In this camera system 1, the specification of the camera body side mount 101 which is a lens mount provided in the camera body 100 and the specification of the lens side mount 201 which is a lens mount provided in the interchangeable lens 200 are different from each other. is there. For example, the specifications of the camera body side mount 101 and the specifications of the lens side mount 201 are different from each other in the specifications of the mount shape and the specifications of the connection terminals to be electrically connected. Further, the communication standard and the type of communication data communicated via the connection terminal are different from each other. Therefore, the interchangeable lens 200 cannot be directly attached to the camera body 100.
Therefore, the adapter 300 is configured as a mount adapter that allows the camera body 100 and the interchangeable lens 200 to be mounted indirectly. Furthermore, the adapter 300 is configured to enable communication between the camera body 100 and the interchangeable lens 200 having different communication standards and communication data types without changing the communication standards. Has been.
In addition, the camera body 100 includes a power button 131, a release button 132, a rear operation unit 133, and a display unit 150.
The power button 131 is an operation member for switching on and off of the main power supply in the camera body 100.
The release button 132 is an operation member that receives an instruction to start shooting processing. For example, the release button 132 is pressed halfway (half-pressed state, for example, accepting focus adjustment, exposure adjustment, etc.) and fully pressed (full-pressed state, for example, accepting an instruction to start exposure). Two types of shooting processing start instructions are accepted.
The back operation unit 133 is provided on the back surface of the housing surface of the camera body 100, which is the surface opposite to the surface provided with the camera body side mount 101. The rear operation unit 133 includes operation members such as operation mode selection buttons (for example, a mode dial) or various setting condition selection buttons (for example, a menu button and up / down / left / right selection buttons). .
The display unit 150 is provided on the back side similarly to the back side operation unit 133, and displays a captured image or a menu screen for selecting various setting conditions. The display unit 150 includes, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display.

FIG. 2 is a perspective view showing an example of the configuration of the adapter 300 according to the present embodiment.
The adapter 300 includes a first mount part to which the camera body 100 can be attached and detached, and a second mount part that is provided separately from the first mount part and from which the interchangeable lens 200 can be attached and detached.
For example, as illustrated in FIG. 2, the adapter 300 includes a first mount 301 (first mount portion) that can be attached to and detached from the camera body side mount 101 included in the camera body 100, and a lens side mount included in the interchangeable lens 200. 201, a second mount 302 (second mount portion) that can be attached to and detached from the device 201.
A plurality of electrical connection terminals (mount contacts) corresponding to each of the plurality of electrical connection terminals provided in the vicinity of the camera body side mount 101 are provided in the vicinity of the first mount 301. Enter. Thereby, when the adapter 300 is attached to the camera body 100, the adapter 300 is electrically connected to the camera body 100 via the plurality of connection terminals.
A plurality of electrical connection terminals corresponding to each of the plurality of electrical connection terminals provided in the vicinity of the lens side mount 201 are provided in the vicinity of the second mount 302. Thus, when the adapter 300 is attached to the interchangeable lens 200, the adapter 300 is electrically connected to the interchangeable lens 200 via the plurality of connection terminals.

The adapter 300 includes a tripod seat 305 that enables the adapter 300 to be attached to a tripod, a lens attaching / detaching button 306, and an aperture interlocking lever 350.
The lens attaching / detaching button 306 is a button for unlocking a lock mechanism that is mechanically locked when the interchangeable lens 200 is attached. That is, the lens attaching / detaching button 306 is an operation member that is operated when the user removes the interchangeable lens 200 attached to the adapter 300.

The aperture interlocking lever 350 (aperture interlocking mechanism unit) includes an aperture mechanism 251 (FIG. 5) including a plurality of aperture blades that change the aperture diameter (aperture aperture amount, aperture size, aperture ratio, aperture value) of the interchangeable lens 200. 3), the adapter 300 is provided as a lever for displacing. When the position of the diaphragm interlocking lever 350 moves in the direction along the inner periphery of the adapter 300, the aperture diameter of the diaphragm of the interchangeable lens 200 is changed.
For example, the interchangeable lens 200 includes a diaphragm lever 252 (see FIG. 3) that displaces the diaphragm mechanism 251. Therefore, the aperture diameter of the interchangeable lens 200 is displaced by the movement of the aperture lever 252 position. The aperture lever 252 is configured to engage with the aperture interlocking lever 350 and move in conjunction with the aperture interlocking lever 350. For this reason, the aperture opening diameter of the interchangeable lens 200 changes as the position of the aperture interlocking lever 350 moves.
That is, the aperture interlocking lever 350 moves to a position corresponding to the aperture value of the aperture mechanism 251 (aperture) provided in the interchangeable lens 200.

<Description of block configuration of camera system>
Next, the block configuration of the camera system 1 will be described with reference to FIG.
FIG. 3 is a schematic block diagram illustrating an example of the configuration of the camera system 1 according to the present embodiment. In this figure, the camera body 100 and the interchangeable lens 200 are attached via an adapter 300. In addition, the camera body 100, the interchangeable lens 200, and the adapter 300 are electrically connected to each other via connection terminals.

First, an outline of the configuration of the camera system 1 will be described.
The camera body 100 includes a camera body side mount 101 including a connection portion 101s. The adapter 300 includes a first mount 301 including a connection portion 301s and a second mount 302 including a connection portion 302s. The interchangeable lens 200 includes a lens side mount 201 including a connection portion 201s.

The camera body 100 and the adapter 300 are mounted (physically connected) via the camera body side mount 101 and the first mount 301, and are electrically connected via the connection portion 101s and the connection portion 301s. Yes. Each of the connection portion 101s and the connection portion 301s includes twelve connection terminals (terminals Ta1 to Ta12 and terminals Tb1 to Tb12) that are electrically connected to each other, and the camera body 100 and the adapter are connected via the connection terminals. Power supply (voltage supply) and signal exchange (communication) are performed with 300.
In addition, transmission / reception (communication) of a signal is performed between the camera control part 110 with which the camera body 100 is provided, and the adapter control part 310 with which the adapter 300 is provided.

Further, the interchangeable lens 200 and the adapter 300 are mounted (physically connected) via the lens side mount 201 and the second mount 302, and are electrically connected via the connection portion 201s and the connection portion 302s. ing. Each of the connection portion 201s and the connection portion 302s includes nine connection terminals (terminals Tc1 to Tc9 and terminals Td1 to Td9) that are electrically connected to each other. Power supply (voltage supply) and signal exchange (communication) are performed with the adapter 300.
Note that transmission / reception (communication) of signals is performed between the lens control unit 210 provided in the interchangeable lens 200 and the adapter control unit 310 provided in the adapter 300.

(Configuration of camera body)
Next, the configuration of the camera body 100 will be described.
The camera body 100 includes a camera control unit 110, a camera power supply unit 120, a switch 125, a battery unit 190B, and connection units 101s (terminals Ta1 to Ta12).
101 s of connection parts are provided with 12 connection terminals of terminal Ta1-Ta12 as a connection terminal mutually connected with 12 connection terminals (terminal Tb1-Tb12) of the connection part 301s with which the adapter 300 is provided.
The configuration of the adapter 300 will be described later in detail.

The battery unit 190B houses the battery 190.
The battery 190 supplies voltage to the camera body 100, the interchangeable lens 200, and the adapter 300. For example, the battery 190 is a lithium ion secondary battery or a nickel hydride secondary battery. The battery 190 may be a primary battery such as an alkaline battery. Further, the camera body 100 is not limited to the configuration in which the voltage is supplied from the battery 190, and the voltage is supplied from an external DC power source (for example, an AC adapter that converts the AC power source into a DC power source and supplies the voltage). Also good.

  The camera power supply unit 120 converts (divides) the battery voltage so that the voltage supplied from the battery 190 can be supplied to the camera body 100 or a camera accessory connected to the camera body 100. For example, the camera power supply unit 120 converts the battery voltage to supply a voltage to a control system circuit (mainly the camera control unit 110) included in the camera body 100, and the camera power supply unit 120 The power supply Vcc1 is divided into a first power supply system that supplies a voltage to the adapter 300 connected to the connection unit 101s. The voltage of the power supply Vcc1 is supplied to a control system circuit (mainly the adapter control unit 310) provided in the adapter 300. Hereinafter, this power supply Vcc1 is referred to as a control system power supply Vcc1.

Further, the camera power supply unit 120 switches between a voltage supply state and a supply stop state by the control system power supply Vcc1 under the control of the camera control unit 110. Furthermore, the camera power supply unit 120 controls the power that can be supplied (power amount, power supply amount) under the control of the camera control unit 110. For example, the camera power supply unit 120 is in a state (normal power supply state) in which the power (power amount, power supply amount) that can be supplied to the extent that the camera system 1 can execute the imaging process is large, and to the extent that the imaging process cannot be performed. The state (small power supply state) with a small amount of power (power amount, power supply amount) that can be supplied is switched.
The voltage of the control system power supply Vcc1 is supplied to the adapter control unit 310 via the terminal Ta3 and the terminal Tb3.

  Further, the positive terminal of the battery 190 and the terminal Ta2 are connected to the battery part 190B via the switch 125. As a result, the power supply PWR as the second power supply system is generated from the battery 190 separately from the power supply Vcc1 as the first power supply system described above, and the voltage from the power supply PWR is supplied to the adapter power supply unit 320. The voltage of the power supply PWR is supplied to the adapter power supply unit 320 via the terminal Ta2 and the terminal Tb2. Instead of the battery 190, the voltage of the power source PWR may be supplied from an external DC power source. The power supply PWR is a power supply system that can supply a larger voltage than the control system power supply Vcc1. Hereinafter, this power supply PWR is referred to as a power system power supply PWR. Note that the power system power supply PWR may be a power supply system that can supply more power (power amount) than the control system power supply Vcc1.

The power system ground PGND, which is a ground (GND) corresponding to the power system power supply PWR, is connected to each part to which the voltage of the power system power supply PWR is supplied and the terminal Ta1. On the other hand, a control system ground SGND that is a ground corresponding to the control system power supply Vcc1 is connected to the terminal Ta12. The power system ground PGND and the control system ground SGND are grounds having the same potential as the negative terminal of the battery 190 via the battery unit 190B.
The control system ground SGND is also a ground corresponding to the power supply Vcc0, and the control system ground SGND is connected to the ground terminal of the camera control unit 110.

  The switch 125 switches between a conduction state and a cutoff state (non-conduction state) under the control of the camera control unit 110. That is, the switch 125 switches whether to supply the voltage of the power system power supply PWR to the terminal Ta2 under the control of the camera control unit 110.

  The camera control unit 110 includes a camera power control unit 111, a first camera communication unit 112, and a second camera communication unit 113. The camera control unit 110 controls each unit included in the camera body 100, and the first data communication system D1b and the second data communication with the adapter control unit 310 of the adapter 300 connected via the connection unit 101s. Two systems of communication with the system D2b are performed.

The camera power supply control unit 111 controls the camera power supply unit 120 and the switch 125 based on the state of the camera body 100 or the communication state by the first camera communication unit 112 or the second camera communication unit 113.
Each of the first camera communication unit 112 and the second camera communication unit 113 independently performs two systems of communication of the first data communication system D1b and the second data communication system D2b.

The first data communication system D1b is a communication system using serial interface full-duplex communication. The first camera communication unit 112 performs transmission / reception (communication) of four types of signals RDY, CLK1, DATAB, and DATAL as the first data communication system D1b.
The signal RDY is a signal for notifying the first camera communication unit 112 of whether communication is possible. The signal RDY is transmitted (output) from the first adapter communication unit 312 described later to the first camera communication unit 112 via the terminal Ta4. The signal CLK1 is a clock signal for serial communication. The clock signal CLK1 is transmitted (output) from the first camera communication unit 112 to the first adapter communication unit 312 via the terminal Ta5. The signal DATAB is a data signal related to the camera body 100 that is output from the first camera communication unit 112 to the first adapter communication unit 312 via the terminal Ta6. The signal DATAL is a data signal related to the interchangeable lens 200 that is output from the first adapter communication unit 312 to the first camera communication unit 112. The first camera communication unit 112 receives the signal DATAL via the terminal Ta7.

The second data communication system D2b is a serial interface system, and is a communication system using unidirectional communication in which data is transmitted to the camera body 100. The second camera communication unit 113 performs transmission / reception (communication) of four types of signals HREQ, HANS, HCLK, and HDATA.
The signal HREQ is a signal indicating a communication request from the second camera communication unit 113, and the second camera communication unit 113 transmits (outputs) to the second adapter communication unit 313 described later via the terminal Tb8. . The signal HANS is a signal indicating a communication response to the second camera communication unit 113, and is transmitted from the second adapter communication unit 313 to the second camera communication unit 113 via the terminal Tb9. The signal HCLK is a clock signal for serial communication. The clock signal HCLK is transmitted (output) from the second camera communication unit 113 to the second adapter communication unit 313 via the terminal Tb10. The signal HDATA is a lens data signal transmitted from the second adapter communication unit 313 to the second camera communication unit 113 via the terminal Tb11.

  The contents of communication in the first data communication system D1b and the second data communication system D2b will be described in detail later.

(Configuration of interchangeable lens)
Next, the configuration of the interchangeable lens 200 will be described.
The interchangeable lens 200 includes a connection unit 201s (terminals Td1 to Td9), a lens control unit 210, an optical system 220, and an optical system driving unit 230.
Subject light (optical image) incident through the optical system 220 is guided to a light receiving surface of a well-known imaging element (not shown) provided in the camera body 100 through an adapter 300.
The optical system 220 includes a lens 221, a focus adjustment lens (hereinafter referred to as a focus lens) 222, and an image blur correction (anti-vibration) lens (hereinafter referred to as a VR (Vibration Reduction) lens) 223. And a diaphragm unit 250.

  The aperture unit 250 includes an aperture mechanism 251 including a plurality of aperture blades, and an aperture lever 252 that mechanically operates the aperture mechanism 251. Therefore, the aperture diameter of the interchangeable lens 200 changes when the aperture lever 252 mechanically operates the aperture mechanism 251. The interchangeable lens 200 in the camera system 1 shown in FIG. 3 is a lens that does not incorporate a power source such as an actuator that drives the diaphragm mechanism 251, and the diaphragm mechanism 252 of the adapter 300 is coupled to the diaphragm mechanism 252 via the diaphragm lever 252. Reference numeral 251 denotes a lens to be driven.

The optical system driving unit 230 includes an AF (Auto Focus) driving unit 231, an AF encoder 232, and a VR driving unit 235.
The AF driving unit 231 drives the focus lens 222 under the control of the lens control unit 210. The AF encoder 232 detects the position of the focus lens 222 and supplies the detection result to the lens control unit 210.
The VR drive unit 235 drives the VR lens 223 under the control of the lens control unit 210.
Note that the interchangeable lens 200 may include a focus ring that moves the position of the focus lens 222 when manually operated by the user.

The connection unit 201s includes nine connection terminals Td1 to Td9 as connection terminals connected to the nine connection terminals (terminals Tc1 to Tc9) of the connection unit 302s included in the adapter 300.
The power source Vp to which the voltage of the optical system driving unit 230 is supplied is supplied via the terminal Td2. Hereinafter, this power source Vp is referred to as a lens driving system power source Vp. The lens driving system power supply Vp is supplied from the power system power supply PWR via the adapter 300.
For example, the lens driving system power supply Vp is supplied from the terminal Td2 to the optical system driving unit 230 that consumes a large amount of power, such as an actuator that drives the focus lens 222 provided in the AF driving unit 231 and an actuator that drives the VR lens 223. Is supplied. A power system ground PGND that is a ground corresponding to the lens driving system power supply Vp is connected to the ground terminal of the optical system driving unit 230 and the terminal Td1.

A power supply Vc to which the voltage of the lens control unit 210 is supplied is connected to the terminal Td3. Hereinafter, this power source Vc is referred to as a lens control system power source Vc. The lens control system power supply Vc is supplied from the power system power supply PWR via the adapter 300.
The voltage of the lens control system power supply Vc is supplied to the control system circuit including the lens control unit 210 that consumes less power than the optical system driving unit 230 via the terminal Td3. A control system ground SGND that is a ground corresponding to the lens control system power supply Vc is connected to the ground terminal of the lens control unit 210 and the terminal Td9.
That is, the power system ground PGND and the control system ground SGND are not connected to each other in the interchangeable lens 200 and are separated into two systems of ground.

    The lens control unit 210 includes an optical system control unit 211, a first lens communication unit 212, and a second lens communication unit 213. The lens control unit 210 controls the optical system driving unit 230, and the first data communication system D1L and the second data communication system D2L with the adapter control unit 310 of the adapter 300 connected via the connection unit 201s. The two systems of communication are controlled.

  The optical system control unit 211 controls the optical system drive unit 230. For example, the optical system control unit 211 initializes the optical system drive unit 230 according to the communication state with the adapter 300. Further, the optical system control unit 211 controls the optical system drive unit 230 so as to drive a drive element such as the focus lens 222 or the VR lens 223 according to the control of the camera control unit 110 via the adapter 300. Further, the optical system control unit 211 acquires information on the optical system (driving element) 220 supplied from the optical system driving unit 230 (for example, information such as the position of the focus lens 222 detected by the AF encoder 232).

The first lens communication unit 212 and the second lens communication unit 213 respectively execute two systems of communication of the first data communication system D1L and the second data communication system D2L at independent timings.
The first data communication system D1L is a communication system using serial interface half duplex communication. The first lens communication unit 212 performs communication of the three types of signals R / W, CLK2, and DATA as the first data communication system D1L.
The signal R / W is a read / write signal indicating a communication direction of a data signal to be described later, and is transmitted and received between a first adapter communication unit 312 and a first lens communication unit 212 to be described later via a terminal Td4. . The signal CLK2 is a clock signal for serial communication, and is transmitted (output) from the first adapter communication unit 312 to the first lens communication unit 212 via the terminal Td5. The signal DATA is a data signal transmitted and received between the first adapter communication unit 312 and the first lens communication unit 212 via the terminal Td6.

The second data communication system D2L is a pulse communication system, and is a communication system based on unidirectional communication in which a pulse signal is output from the interchangeable lens 200. The second lens communication unit 213 transmits two types of pulse signals, signals HLP1 and HLP2, as the second data communication system D2L.
The signal HLP1 is a pulse signal transmitted to the second adapter communication unit 313, which will be described later, via the terminal Td7. The signal HLP2 is a pulse signal output from the second lens communication unit 213 to the second adapter communication unit 313 via the terminal Td8. These pulse signals HLP 1 and HLP 2 are pulse signals corresponding to signals output from the AF encoder 232.

  The contents of communication communicated in the first data communication system D1L and the second data communication system D2L will be described in detail later.

(Adapter configuration)
Next, the configuration of the adapter 300 will be described.
The adapter 300 includes an adapter control unit 310, an adapter power supply unit 320, an aperture interlocking lever driving unit 330 (aperture interlocking mechanism driving unit), a connection unit 301s (terminals Tb1 to Tb12), and a connection unit 302s (terminals Tc1 to Tc9). ) And a diaphragm interlocking lever 350.

  The connection portion 301s includes twelve connection terminals Tb1 to Tb12 that are connected to the twelve connection terminals Ta1 to Ta12 described above on the camera body 100 side. When the adapter 300 and the camera body 100 are connected via the connection part 301s and the connection part 101s, the terminals Tb1 to Tb12 of the connection part 301s correspond to the terminals Ta1 to Ta12 of the connection part 101s, respectively. Electrically connect to the connection terminal.

  The connection portion 302s includes nine connection terminals Tc1 to Tc9 that are connected to the nine connection terminals (terminals Td1 to Td9) described above on the interchangeable lens 200 side. When the adapter 300 and the interchangeable lens 200 are connected via the connection portion 302s and the connection portion 201s, the terminals Tc1 to Tc9 of the connection portion 302s correspond to the terminals Td1 to Td9 of the connection portion 201s, respectively. Connect to the connection terminal.

Terminal Tb2 is connected to terminal Ta2, and terminal Tb3 is connected to terminal Ta3. As a result, the voltage of the power system power supply PWR is supplied from the camera body 100 to the terminal Tb2 through the terminal Ta2, and the voltage of the control system power supply Vcc1 is supplied to the terminal Tb3 through the terminal Ta3. As a result, the adapter power supply unit 320 is supplied with the voltage of the power system power supply PWR from the camera body 100 via the terminal Ta2 and the terminal Tb2.
On the other hand, the adapter control unit 310 is supplied with the voltage of the control system power supply Vcc1 from the camera body 100 via the terminal Ta3 and the terminal Tb3.

As described above, the adapter 300 has the voltage of the control system power supply Vcc1 (the voltage of the first power supply system) from the camera body 100 and the voltage of the power system power supply PWR (the first voltage that can be supplied higher than the control system power supply Vcc1). Both voltages of the two power supply systems are supplied. The lens system power supply Vp (third power supply system) and the lens control system power supply Vc (fourth) are used as the lens system power supply system that supplies the interchangeable lens 200 with the voltage of the power system power supply PWR supplied to the adapter power supply unit 320. (Converted). For example, the adapter power supply unit 320 generates supply voltages for the lens drive system power supply Vp and the lens control system power supply Vc that supply power to the interchangeable lens 200 from the power system power supply PWR supplied from the camera body 100.
The voltage supplied from the lens drive system power supply Vp is larger than the voltage supplied from the lens control system power supply Vc. Further, the power consumption in the load supplied from the lens drive system power supply Vp may be larger than the power consumption in the load supplied from the lens control system power supply Vc.

Further, from the power system power supply PWR supplied to the adapter power supply section 320, a power supply Vm (fifth) for supplying a voltage to the aperture interlocking lever drive section 330, separately from the lens drive system power supply Vp and the lens control system power supply Vc described above. A power system is also generated (separated). Hereinafter, this power source Vm is referred to as a diaphragm driving power source Vm.
For example, the adapter power supply unit 320 includes a voltage conversion unit that converts the voltage of the power system power supply PWR into a predetermined voltage of the diaphragm drive power supply Vm. The voltage conversion unit includes, for example, a DC-DC converter. The voltage conversion unit converts the voltage into a voltage that is stepped up and down to a predetermined voltage (a predetermined voltage of the diaphragm driving power source Vm), for example. Then, the adapter power supply unit 320 supplies the generated voltage of the diaphragm driving power source Vm to the diaphragm interlocking lever driving unit 330.
Note that the adapter power supply unit 320 may include a first regulator unit that converts (generates) the voltage of the lens control system power supply Vc based on the voltage of the diaphragm drive power supply Vm. For example, the first regulator unit converts the voltage of the diaphragm driving power source Vm into a voltage that is stepped down to a predetermined voltage (a predetermined voltage of the lens control system power source Vc). For example, this 1st regulator part is good also as a structure provided with the 1st linear regulator. The voltage of the diaphragm driving power source Vm is set to be higher than the voltage of the lens control system power source Vc.
Further, the adapter power supply unit 320 may include a second regulator unit that converts (generates) the voltage of the lens driving system power supply Vp based on the voltage of the power system power supply PWR. For example, the second regulator unit converts the voltage of the power system power supply PWR into a voltage that is stepped down to a predetermined voltage (a predetermined voltage of the lens driving system power supply Vp). For example, this 2nd regulator part is good also as a structure provided with the 2nd linear regulator. In this case, the second regulator unit is configured so that the voltage that can be supplied is larger than the first regulator unit (the amount of power supply is large). The adapter power supply unit 320 includes a voltage detection unit that detects a power supply voltage, and supplies the detection result to the adapter control unit 310.
The internal configuration of the adapter power supply unit 320 will be described later with reference to FIG.

The connection of each power supply system converted by the adapter power supply unit 320 is as follows.
The terminal Tc2 is connected to the lens drive system power supply Vp output terminal (terminal that outputs the voltage of the lens drive system power supply Vp) of the adapter power supply unit 320. The terminal Tc3 is connected to a lens control system power supply Vc output terminal (terminal that outputs a voltage of the lens control system power supply Vc) of the adapter power supply unit 320. Thereby, the adapter power supply unit 320 supplies the voltage of the lens driving system power supply Vp to the terminal Tc2, and supplies the voltage of the lens control system power supply Vc to the terminal Tc3.
Further, the adapter power supply unit 320 supplies the voltage of the lens drive system power supply Vp to the optical system drive unit 230 of the interchangeable lens 200 via the terminal Tc2 and the terminal Td2.
Further, the adapter power supply unit 320 supplies the voltage of the lens control system power supply Vc to the lens control unit 210 of the interchangeable lens 200 via the terminal Tc3 and the terminal Td3.

As described above, the adapter power supply unit 320 can generate the voltage supplied to the optical system driving unit 230 and the lens control unit 210 of the interchangeable lens 200 from the voltage of the power system power supply PWR.
Accordingly, the adapter 300 can set the voltage of the control system power supply Vcc1 supplied from the camera body 100 to the voltage supplied to the adapter control unit 310 without using the voltage supplied to the interchangeable lens 200. The camera power supply unit 120 in the camera body 100 is configured to constantly supply the control system power supply Vcc1 (as long as there is a “supply request” from the connection destination) to the connection destination connected via the terminal Ta3. Has been. For this reason, the adapter controller 310 connected to the terminal Ta3 via the terminal Tb3 can always be activated even if the power switch on the camera body 100 side is turned off. By always starting the adapter control unit 310, the setting state on the adapter 300 side (for example, whether or not the initialization process of the aperture interlock lever 350 has been completed) can be stored. There is an advantage that when the power switch on the 100 side is turned on, unnecessary initialization processing is not required in the adapter 300. Although not described in the present embodiment, when a camera body activation switch that can be operated by the user (a switch for switching the power ON / OFF on the adapter 300 side) is provided on the adapter 300 side, the activation switch is turned on. Since the operation can be constantly monitored, it is possible to configure a system in which the camera body 100 is activated by an operation on the adapter 300 side. When the system configuration for transmitting to the unit 210 is adopted, even if an operation switch for activating the camera body 100 is provided on the interchangeable lens 200 side, the activated state is established between both the interchangeable lens 200 and the camera body 100. There is no adapter (because power is not supplied) Therefore, it is impossible to convey the operation of the operation switch of the interchangeable lens 200 to the camera body 100 side, it is not possible to activate the camera body 100).

  Further, the adapter power supply unit 320 supplies the voltage of the diaphragm driving power source Vm in the adapter 300 to the diaphragm interlocking lever driving unit 330. That is, the adapter 300 generates a voltage to be supplied to the aperture interlocking lever driving unit 330 from the voltage of the power system power supply PWR supplied from the camera body 100. Since the power system power supply PWR has a sufficiently larger power supply than the control system power supply Vcc1, the power system power supply PWR can be used for power supply to various circuits, and from the power system power supply PWR as in this embodiment. Even if a voltage to be supplied to the aperture interlocking lever driving unit 330 is created (also used as the power system power supply PWR), it adversely affects the operation of other circuits (for example, the operation of the lens control unit 210 described above). Never give

  The terminal Tb1 is connected to the terminal Ta1 of the camera body 100. Thereby, the power system ground PGND is connected to the terminal Tb1 via the terminal Ta1. Further, the terminal Tb1 and the terminal Tc1 are connected as a power system ground PGND in the adapter 300. Further, the terminal Tc1 is connected to the terminal Td1 of the interchangeable lens 200. Thereby, the power system ground PGND is connected to the terminal Td1 via the terminal Tc1 as a ground corresponding to the lens driving system power supply Vp. The power system ground PGND is also connected as a ground for the adapter power supply unit 320, the diaphragm interlocking lever driving unit 330, and the like.

  The terminal Tb12 is connected to the terminal Ta12 of the camera body 100. Thereby, the control system ground SGND is connected to the terminal Tb12 via the terminal Ta12. The terminal Tb12 and the terminal Tc9 are connected as a control system ground SGND in the adapter 300. Further, the terminal Tc9 is connected to the terminal Td9 of the interchangeable lens 200. Thus, the control system ground SGND is connected to the terminal Td9 via the terminal Tc9 as a ground corresponding to the lens control system power supply Vc. The control system ground SGND is also connected as a ground for the adapter control unit 310.

Thus, the power system ground PGND and the control system ground SGND are not connected to each other in the adapter 300 and are separated into two systems of ground.
That is, in the interchangeable lens 200 and the adapter 300, the power system ground PGND and the control system ground SGND are not connected to each other and are separated into two systems of ground. However, the power system ground PGND and the control system ground SGND that are separated into two systems are connected in the camera body 100 and are grounded at the same potential as the negative electrode of the battery 190. Accordingly, the grounds of the camera control unit 110, the lens control unit 210, and the adapter control unit 310 are connected to the control system ground SGND and have the same potential.
Therefore, it is possible to reduce the influence of noise generated in the power system ground PGND on the control system ground SGND.

In the interchangeable lens 200, the control system ground SGND may be connected to the conductive portion (interchangeable lens housing) of the lens side mount 201. Further, the terminal Td9 to which the control system ground SGND is connected in the interchangeable lens 200 may be included in the conductive portion of the lens side mount 201. Similarly, in the adapter 300, the control system ground SGND may be connected to the conductive portion of the second mount 302. In addition, the terminal Tc9 to which the control system ground SGND is connected in the adapter 300 may be included in the conductive portion of the second mount 302.
Further, similarly, the terminal Tb9 may be connected to the conductive portion of the first mount 301, and the terminal Tb9 may be included in the conductive portion of the first mount 301. Similarly, the terminal Ta9 may be connected to the conductive portion of the camera body side mount 101, and the terminal Ta9 may be included in the conductive portion of the camera body side mount 101.

  The aperture interlocking lever driving unit 330 moves the position of the aperture interlocking lever 350 under the control of the adapter control unit 310. The aperture interlocking lever driving unit 330 moves the aperture interlocking lever 350 to displace the aperture mechanism 251 of the interchangeable lens 200 via the aperture lever 252. Further, the aperture interlocking lever driving unit 330 detects the position of the aperture interlocking lever 350 and outputs the detection result to the adapter control unit 310.

  For example, the aperture interlocking lever driving unit 330 detects the position of an aperture driving actuator (for example, a stepping motor) that drives the aperture interlocking lever 350, a motor driving unit that drives and controls the aperture driving actuator, and the position of the aperture interlocking lever 350. A diaphragm interlocking lever position detection unit is provided. As a result, in the aperture interlocking lever driving unit 330, the motor driving unit drives the aperture driving actuator, so that the aperture driving actuator drives the aperture interlocking lever 350. In the aperture interlocking lever driving unit 330, an aperture interlocking lever position detection unit (for example, a photo interrupter) detects the position of the aperture interlocking lever 350 and supplies the detection result to the adapter control unit 310.

The adapter control unit 310 includes an adapter power supply control unit 311, a first adapter communication unit 312, a second adapter communication unit 313, and an aperture control unit 314. The adapter control unit 310 is controlled by periodic communication with the camera control unit 110 to control processing performed in each unit included in the adapter 300 and performs periodic communication with the lens control unit 210. . For example, the adapter control unit 310 performs regular periodic communication with the camera control unit 110. The adapter control unit 310 also performs regular periodic communication with the lens control unit 110.
The adapter control unit 310 controls the aperture interlocking lever driving unit 330 and the optical system driving unit 230 of the interchangeable lens 200 based on communication from the camera control unit 110 for controlling the photographing process. Therefore, communication with the lens control unit 210 is performed.
The adapter power supply control unit 311 controls the adapter power supply unit 320 according to the communication result with the camera control unit 110 or the lens control unit 210, the state of the adapter 300, or the like. For example, the adapter power supply control unit 311 controls the adapter power supply unit 320 according to the result of communication with the camera control unit 110 or the lens control unit 210, and the lens control system power supply Vc, the lens drive system power supply Vp, or the aperture drive It is controlled whether or not the voltage of the power source Vm is supplied.
The adapter power supply control unit 311 generates the voltage of the power supply system to which the voltage is supplied from the camera body 100 (in other words, the state of the voltage supplied from the camera body 100 side to the adapter 300) and the adapter 300 Then, the voltage of the power supply system that supplies the voltage (in other words, the state of the voltage supplied to the interchangeable lens 200 from the adapter 300 side) is monitored. The adapter power supply control unit 311 includes a voltage detection unit that detects the voltage of each power supply system. The adapter power supply control unit 311 monitors the voltage of each power supply system based on the detection result from the voltage detection unit, and the monitoring result is used as necessary. To the camera control unit 110. This operation will be described in detail later in “Processing at the time of instantaneous power interruption” (FIG. 16).

The aperture control unit 314 controls the aperture interlocking lever driving unit 330 according to the communication result with the camera control unit 110 or the lens control unit 210.
For example, the aperture control unit 314 determines that the aperture of the aperture 251 becomes an aperture according to a control instruction from the camera control unit 110 according to a communication result with the camera control unit 110. To control.
Further, the aperture control unit 314 controls the aperture interlocking lever driving unit 330 to move the position of the aperture interlocking lever 350 to the initial position according to the processing. For example, the aperture control unit 314 sets the aperture interlocking lever 350 to an initial position such as a position at which the aperture 251 is opened, a retracted position that does not interfere with the aperture lever 252 that moves according to a set aperture value of the aperture 251, and the like. The diaphragm interlocking lever driving unit 330 is controlled to move the aperture.
The aperture control unit 314 also acquires the position of the aperture interlocking lever 350 detected by the aperture interlocking lever driving unit 330.

The first adapter communication unit 312 performs communication of the first data communication system D1b with the first camera communication unit 112, and performs communication of the first data communication system D1L with the first lens communication unit 212. To do.
Specifically, the first adapter communication unit 312 relays communication between the first data communication system D1b and the first data communication system D1L, which are different communication standards. For example, the first adapter communication unit 312 receives data received from the first camera communication unit 112 according to the communication standard of the first data communication system D1b, which is serial interface full duplex communication, and uses serial interface half duplex communication. Is converted to data of the communication standard of the first data communication system D1L and is transmitted to the first lens communication unit 212. On the other hand, the first adapter communication unit 312 receives data received from the first lens communication unit 212 according to the communication standard of the first data communication system D1L, which is serial interface half duplex communication, and uses serial interface full duplex communication. Is converted to data of the communication standard of the first data communication system D1b and transmitted to the first camera communication unit 112.
The first adapter communication unit 312 relays communication between the first data communication system D1b and the first data communication system D1L that are communicated with each other at different periods.
In addition, the first adapter communication unit 312 performs a conversion process for ensuring the consistency of the format of data transmitted and received between the first data communication system D1b and the first data communication system D1L.
The adapter control unit 310 includes, for example, a storage unit (not shown). The first adapter communication unit 312 temporarily stores data generated based on received data, converted data, and the like in the storage unit. Then, the first adapter communication unit 312 reads the generated data from the storage unit and transmits it.

The first adapter communication unit 312 and the first camera communication unit 112 perform communication of the first data communication system D1b via four types of signal lines of signals RDY, CLK1, DATAB, and DATAL. The terminal Tb4 is connected to the first adapter communication unit 312 via the signal line of the signal RDY. The terminal Tb5 is connected to the first adapter communication unit 312 via the signal line of the signal CLK1, the terminal Tb6 is connected to the signal line of the signal DATAB, and the terminal Tb7 is connected to the signal line of the signal DATAL. The terminal Tb4 is connected to the terminal Ta4 of the camera body 100, the terminal Tb5 is connected to the terminal Ta5, the terminal Tb6 is connected to the terminal Ta6, and the terminal Tb7 is connected to the terminal Ta7.
That is, the four types of signal lines RDY, CLK1, DATAB, and DATAL for performing communication of the first data communication system D1b are connected to the first adapter communication unit 312 and the first via the terminals Tb4 to Tb7 and the terminals Ta4 to Ta7. The camera communication unit 112 is connected.

On the other hand, the first adapter communication unit 312 and the first lens communication unit 212 execute communication of the first data communication system D1L via three types of signal lines of signals R / W, CLK2, and DATA. The terminal Tc4 is connected to the first adapter communication unit 312 via a signal R / W signal line. The terminal Tc5 is connected to the first adapter communication unit 312 via the signal line of the signal CLK2, and the terminal Tc6 is connected to the signal line DATA. The terminal Tc4 is connected to the terminal Td4 of the interchangeable lens 200, the terminal Tc5 is connected to the terminal Td5, and the terminal Tc6 is connected to the terminal Td6.
That is, the three types of signal lines R / W, CLK2, and DATA for performing communication of the first data communication system D1L are connected to the first adapter communication unit 312 and the first via the terminals Tc4 to Tc6 and the terminals Td4 to Td6. The lens communication unit 212 is connected.

As described above, communication of the first data communication system D1b and communication of the first data communication system D1L are performed between the first camera communication unit 112 and the first lens communication unit 212 via the first adapter communication unit 312. Is called. In the communication of the first data communication system D1b and the communication of the first data communication system D1L, for example, between the first camera communication unit 112 and the first lens communication unit 212 via the first adapter communication unit 312. Information of the optical system 220, a request command such as a control instruction, response data to the request command, and the like are communicated. Here, communication in the first data communication system D1b and the first data communication system D1L is referred to as command data communication.
The information of the optical system 220 is information indicating the type of the optical system 220 (information indicating the specifications, functions, optical characteristics, etc. of the optical system 220) or information indicating the driving state of the optical system 220.
As described above, the first adapter communication unit 312 in the adapter control unit 310 receives the camera control command output from the first camera communication unit 112 of the camera control unit 110 (in other words, the first reception unit). ) And a function of transmitting a lens control command for driving and controlling the drive element of the interchangeable lens 200 to the first lens communication unit 212 of the interchangeable lens 200 according to the content received by the first receiver (in other words, A first transmission unit), a function of receiving state information indicating the driving state of the drive element from the first lens communication unit 212 of the interchangeable lens 200 (in other words, the second reception unit), and reception by the second reception unit. A function of transmitting state information indicating the driving state of the driving element to the first camera communication unit 112 of the camera body 100 based on the content (in other words, the second transmission unit).

The second adapter communication unit 313 receives the pulse signal of the second data communication system D2L from the second lens communication unit 213, and executes communication of the second data communication system D2b with the second camera communication unit 113. .
Specifically, the second adapter communication unit 313 detects information included in the pulse signal of the second data communication system D2L, and converts the detected information in accordance with the communication standard of the second data communication system D2b. For example, the second adapter communication unit 313 receives the pulse signal received from the second lens communication unit 213 according to the communication standard of the second data communication system D2L, which is a unidirectional communication of the pulse communication method, by the unidirectional communication of the serial interface method. The data is converted into communication standard data of a second data communication system D2b and transmitted to the second camera communication unit 113. In addition, the second adapter communication unit 313 converts the information included in the pulse signal received by the communication of the second data communication system D2L into the communication standard of the second data communication system D2b according to the control by the first adapter communication unit 312. The data is converted and transmitted to the second camera communication unit 113.

The second adapter communication unit 313 and the second camera communication unit 113 perform communication of the second data communication system D2b via four types of signal lines of signals HREQ, HANS, HCLK, and HDATA. The terminal Tb8 is connected to the second adapter communication unit 313 via the signal line of the signal HREQ. The terminal Tb9 is connected to the second adapter communication unit 313 via the signal HANS signal line, the terminal Tb10 is connected to the signal HCLK signal line, and the terminal Tb11 is connected to the signal HDATA signal line. The terminal Tb8 is connected to the terminal Ta8 of the camera body 100, the terminal Tb9 is connected to the terminal Ta9, the terminal Tb10 is connected to the terminal Ta10, and the terminal Tb11 is connected to the terminal Ta11.
In other words, the four types of signal lines HREQ, HANS, HCLK, and HDATA for performing communication of the second data communication system D2b are connected to the second adapter communication unit 313 and the second through the terminals Tb8 to Tb11 and the terminals Ta8 to Ta11. The camera communication unit 113 is connected.

On the other hand, the second adapter communication unit 313 and the second lens communication unit 213 execute communication of the second data communication system D2L via two types of signal lines, signals HLP1 and HLP2. The terminal Tc7 is connected to the second adapter communication unit 313 via the signal line of the signal HLP1. The terminal Tc8 is connected to the second adapter communication unit 313 via a signal line for the signal HLP2. The terminal Tc7 is connected to the terminal Td7 of the interchangeable lens 200, and the terminal Tc8 is connected to the terminal Td8.
That is, the two types of signal lines HLP1 and HLP2 for performing communication of the second data communication system D2L are connected to the second adapter communication unit 313 and the second lens communication unit 213 via the terminals Tc7 to Tc8 and the terminals Td7 to Td8. Connected between.

  As described above, the communication of the second data communication system D2b and the communication of the second data communication system D2L are performed between the second camera communication unit 113 and the second lens communication unit 213 via the second adapter communication unit 313. Is called. In the communication of the second data communication system D2b and the communication of the second data communication system D2L, the second lens communication unit 213 is connected via the second adapter communication unit 313 based on the communication request signal of the second camera communication unit 113. For example, data indicating the position of the focus lens 222 is communicated. Here, communication in the second data communication system D2b and the second data communication system D2L is referred to as hotline communication.

(Details of the adapter power supply and power system configuration)
Next, details of the configuration of the adapter power supply unit 320 and the power supply system in the adapter 300 will be described with reference to FIG.
FIG. 4 is a schematic block diagram showing an example of the configuration of the adapter power supply unit 320 and the power supply system. In the figure, the same reference numerals are given to portions corresponding to the respective portions in FIG. Further, the adapter control unit 310 shown in this figure shows only the configuration related to the adapter power supply control unit 311.

  The adapter power supply unit 320 includes a DC-DC converter unit 321 (voltage conversion unit), a first regulator unit 322, a second regulator unit 323, a Vc voltage detection unit 325 (voltage detection unit of the fourth power supply system), A Vp voltage detection unit 326 (voltage detection unit of the third power supply system), a PWR voltage detection unit 327 (voltage detection unit of the second power supply system), a fuse F1, and a fuse F2 are provided.

  The DC-DC converter unit 321 is connected to the power supply line of the power system power supply PWR and is supplied with the voltage of the power system power supply PWR. The DC-DC converter unit 321 generates a diaphragm drive power source Vm converted into a voltage that is stepped up or down from a voltage of the power system power source PWR to a predetermined voltage. The power line of the diaphragm driving power source Vm generated by the DC-DC converter section 321 is connected to the diaphragm interlocking lever driving section 330 and the input terminal of the first regulator section 322 via the fuse F1, and the diaphragm driving power is supplied. The voltage of the power source Vm is supplied.

  The first regulator unit 322 includes, for example, a first linear regulator, and generates a lens control system power supply Vc in which the voltage of the diaphragm driving power supply Vm is stepped down to stabilize the voltage. The power supply line of the lens control system power supply Vc is connected to the terminal Tc3 described with reference to FIG.

  Further, the power line of the power system power supply PWR is connected to the input terminal of the second regulator unit 323, and the voltage of the power system power supply PWR is supplied. The second regulator unit 323 includes, for example, a second linear regulator, and generates a lens driving system power supply Vp in which the voltage of the power system power supply PWR is stepped down to stabilize the voltage. The second regulator unit 323 is a regulator having a large amount of power supply that can be supplied as compared with the first regulator unit 322. The power line of the lens driving system power supply Vp is connected to the terminal Tc2 described with reference to FIG. 3 via the fuse F2.

The connection position of the fuse is not limited to the connection position of the fuse F1 and the fuse F2 shown in this figure. For example, a fuse connected in series to the power line of the diaphragm driving power source Vm is branched into a power line connected to the diaphragm interlocking lever driving unit 330 and a power line connected to the first regulator unit 322. It is good also as a structure connected to each subsequent power supply line in series. The fuse may be configured to be connected in series to the power line of the lens control power supply Vc. Further, the fuse F2 connected in series to the power line of the lens driving system power supply Vp is on the second regulator section 323 side with respect to the connection point between the power line of the lens driving system power supply Vp and the Vp voltage detection section 326. Although connected in series, it is good also as a structure connected in series by the terminal Tc2 side with respect to this connection point. Similarly, when the fuse is connected in series to the power supply line of the lens control system power supply Vc, the first regulator is connected to the connection point between the power supply line of the lens control system power supply Vc and the Vc voltage detection unit 325. It is good also as a structure connected in series in any side among the part 322 side and the terminal Tc3 side.
These fuses protect the electric circuit by interrupting the current when a large current exceeding the unintended rating flows through each power line.

The signal line of the control signal CTL1 includes a control signal output terminal of the adapter control unit 310, a DC-DC converter unit 321 (for example, a control terminal for output control included in the DC-DC converter unit 321), It is connected to the. Based on the control signal CTL1 supplied from the adapter control unit 310, the DC-DC converter unit 321 changes the supply state of the voltage of the diaphragm drive power source Vm to a power supply state (a state in which voltage is supplied) or a cutoff state. (The supply of voltage is stopped). For example, when the control signal CTL1 is in the H (high) state, the DC-DC converter unit 321 controls the voltage of the diaphragm driving power source Vm to the power supply state. Further, the DC-DC converter unit 321 controls the voltage of the diaphragm driving power source Vm to the cut-off state when the control signal CTL1 is in the L (low) state.
In the first regulator unit 322, the voltage of the lens control system power source Vc is in a power supply state in response to the supply of the voltage of the aperture driving power source Vm, and the supply of the voltage of the aperture driving power source Vm is stopped. In response to this, the voltage of the lens control system power supply Vc is cut off. That is, the voltage supply state of the lens control system power supply Vc generated in the first regulator unit 322 is controlled based on the control signal CTL1 in the same manner as the voltage supply state of the aperture driving power supply Vm.

  The signal line of the control signal CTL2 is connected to the control signal output terminal of the adapter control unit 310 and the second regulator unit 323 (for example, the output control control terminal included in the second regulator unit 323). Has been. Based on the control signal CTL2 supplied from the adapter control unit 310, the second regulator unit 323 sets the voltage supply state of the lens driving system power supply Vp to a power supply state (a state in which voltage is supplied) or a cutoff state ( Control that voltage supply is stopped). For example, when the control signal CTL2 is in the H (high) state, the second regulator unit 323 controls the voltage of the lens driving system power supply Vp to the power supply state. Further, the second regulator unit 323 controls the voltage of the lens driving system power supply Vp to be cut off when the control signal CTL2 is in the L (low) state.

The voltage detection terminal of the Vc voltage detection unit 325 is connected to the power supply line of the lens control system power supply Vc. Accordingly, the Vc voltage detection unit 325 detects the voltage of the lens control system power supply Vc and supplies the detection signal Vc_sen to the adapter control unit 310. For example, the signal line of the detection signal Vc_sen supplied from the Vc voltage detection unit 325 to the adapter control unit 310 is connected to an A / D conversion (analog / digital conversion) input terminal of the adapter control unit 310.
The voltage detection terminal of the Vp voltage detection unit 326 is connected to the power supply line of the lens driving system power supply Vp. Thus, the Vp voltage detection unit 326 detects the voltage of the lens driving system power supply Vp and supplies the detection signal Vp_sen to the adapter control unit 310. For example, the signal line of the detection signal Vp_sen supplied from the Vp voltage detection unit 326 to the adapter control unit 310 is connected to the A / D conversion input terminal of the adapter control unit 310.
The voltage detection terminal of the PWR voltage detection unit 327 is connected to the power supply line of the power system power supply PWR. Accordingly, the PWR voltage detection unit 327 detects the voltage of the power system power supply PWR and supplies the detection signal PWR_sen to the adapter control unit 310. For example, the signal line of the detection signal PWR_sen supplied from the PWR voltage detection unit 327 to the adapter control unit 310 is connected to the A / D conversion input terminal of the adapter control unit 310.

The aperture interlocking lever driving unit 330 includes a stepping motor 335 as an aperture driving actuator, a motor driving unit 331, and an aperture interlocking lever position detection unit 332.
The stepping motor 335 is a power source that drives the aperture interlocking lever 350 and is driven by the motor drive unit 331.
The motor driving unit 331 generates a pulse voltage and drives the stepping motor 335 under the control of the adapter control unit 310. The aperture interlocking lever position detection unit 332 includes a photo interrupter, for example, and detects the position of the aperture interlocking lever 350.

The power line of the diaphragm driving power source Vm generated by the DC-DC converter unit 321 is connected to the motor driving unit 331 and the diaphragm interlocking lever position detecting unit 332, and the voltage of the diaphragm driving power source Vm is supplied. The
The power supply line of the control system power supply Vcc1 is connected to the adapter control unit 310 and the motor drive unit 331, and the voltage of the control system power supply Vcc1 is supplied.

The control system ground SGND is connected to the adapter control unit 310, the motor drive unit 331, the first regulator unit 322, and the Vc voltage detection unit 325 as a ground corresponding to the control system power supply Vcc1.
In addition, the power system ground PGND is connected to the DC-DC converter unit 321, the second regulator unit 323, the Vp voltage detection unit 326, the PWR voltage detection unit 327, the motor drive unit 331, and the aperture interlocking lever position detection unit 332. It is connected as a ground corresponding to the power supply PWR.

  As described above, the adapter 300 uses the lens driving system power supply Vp supplied to the interchangeable lens 200 from the voltage of the power system power supply PWR among the voltage of the control system power supply Vcc1 and the voltage of the power system power supply PWR supplied from the camera body 100. The voltage and the voltage of the lens control system power supply Vc are generated. That is, the adapter control unit 310 is supplied with the voltage of the control system power supply Vcc1 from the camera body 100, and the lens control unit 210 of the interchangeable lens 200 is supplied with the lens control system power supply Vc generated from the power system power supply PWR in the adapter 300. Is supplied. The lens driving system power supply Vp generated from the power system power supply PWR in the adapter 300 is supplied to the optical system driving unit 230 of the interchangeable lens 200.

  Thereby, the adapter 300 can generate and supply a voltage for driving the interchangeable lens 200 from the power system power supply PWR supplied from the camera body 100. For example, even if the voltage of the control system power supply Vcc1 supplied from the camera body 100 is insufficient as compared with the voltage supplied to both the adapter control unit 310 and the lens control unit 210, the adapter 300 has a voltage of A voltage can be supplied to both the adapter control unit 310 and the lens control unit 210 without being insufficient, and a voltage can be supplied to the optical system driving unit 230. Therefore, by connecting the camera body 100 and the interchangeable lens 200 via the adapter 300, the interchangeable lens 200 can be driven and functioned by the camera body 100.

  The adapter 300 supplies the voltage of the lens driving system power supply Vp to a load that consumes more power than the power consumption of the load to which the voltage of the lens control system power supply Vc is supplied. That is, the adapter 300 generates the lens control system power supply Vc as a power supply system that supplies a voltage to the lens control unit 210, and optically supplies the lens drive system power supply Vp that can be supplied in comparison with the lens control system power supply Vc. It is generated as a power supply system that supplies a voltage to the system drive unit 230. Thereby, the adapter 300 can appropriately supply a voltage to the lens control unit 210 and the optical system driving unit 230. Therefore, the adapter 300 can appropriately supply a voltage for driving the interchangeable lens 200.

  In addition, the adapter 300 is stabilized by the DC-DC converter unit 321 because the voltage of the power system power supply PWR is converted from the voltage of the power system power supply PWR to a predetermined voltage to generate the voltage of the diaphragm drive power supply Vm. The supplied voltage can be supplied to the diaphragm interlocking lever driving unit 330. Further, the adapter 300 generates a lens control system power source Vc in which the voltage of the diaphragm driving power source Vm is stepped down to a predetermined voltage by the first regulator unit 322 to stabilize the voltage. A voltage with reduced influence of noise can be supplied to the lens controller 210. The adapter 300 converts the voltage of the power system power supply PWR from the voltage of the power system power supply PWR to a predetermined voltage by the second regulator unit 323 to generate the voltage of the lens drive system power supply Vp. Can be supplied to the optical system driving unit 230.

<Other forms of interchangeable lens>
Next, other forms of the interchangeable lens will be described.
A lens that can be connected to the camera body 100 via the adapter 300 to function is not limited to the interchangeable lens 200 described with reference to FIG. In addition to the interchangeable lens 200, various interchangeable lenses can be connected to the camera body 100 via the adapter 300 to function.
Note that the interchangeable lens 200 described with reference to FIG. 3 includes a communicable lens control unit 210, and the lens control unit 210 controls the optical system driving unit 230 based on a communication result. The interchangeable lens 200 is also referred to as a CPU (Central Processing Unit) lens in the following description.

(Non-CPU lens)
On the other hand, as shown in FIG. 5, an interchangeable lens 200 </ b> B that does not include a communicable lens control unit can be connected to the camera body 100 via the adapter 300 to function.
FIG. 5 is a schematic block diagram illustrating an example of a configuration of a camera system 1B including an interchangeable lens 200B that does not include a communicable lens control unit. In the figure, the same reference numerals are given to portions corresponding to the respective portions in FIG.
In this figure, the camera body 100 and the interchangeable lens 200B are mounted via an adapter 300.

For example, the interchangeable lens 200B is a lens having a specification that does not electrically drive the optical system, and includes a focus ring 260B that can adjust the position of the focus lens 222B by a user operation, and an opening degree of the aperture mechanism 251B by a user operation. It is a lens provided with the aperture ring 255B which can change. Further, the interchangeable lens 200B illustrated in FIG. 5 is different from the interchangeable lens 200 illustrated in FIG. 3 in that it does not include a lens control unit, an optical system driving unit, and an electrical connection terminal.
In the interchangeable lens 200B, the aperture diameter (opening, aperture value) of the aperture mechanism 251B is changed by operating the aperture ring 255B by the user. Therefore, the adapter control unit 310 does not interfere with the position of the aperture lever 252B whose position moves in response to the change in aperture diameter (opening, aperture value) of the aperture mechanism 251B (a position that does not hinder movement). The diaphragm interlocking lever 350 is controlled to the retracted position.
Thereby, the interchangeable lens 200B can be connected to the camera body 100 via the adapter 300, and can be made to function by manual operation according to the specifications of the interchangeable lens 200B.
This interchangeable lens 200B is also referred to as a non-CPU lens in the following description.

(Electromagnetic aperture CPU lens)
In addition, as shown in FIG. 6, an electromagnetic diaphragm type interchangeable lens 200 </ b> C that electrically drives the diaphragm mechanism 251 </ b> C can be connected to the camera body 100 via an adapter 300 to function.
FIG. 6 is a schematic block diagram illustrating an example of a configuration of a camera system 1C including the electromagnetic diaphragm type interchangeable lens 200C. In the figure, the same reference numerals are given to portions corresponding to the respective portions in FIG.
In this figure, the camera body 100 and the interchangeable lens 200C are attached via an adapter 300.
An interchangeable lens 200C shown in FIG. 6 differs in that the interchangeable lens 200 shown in FIG. 3 includes an aperture unit 250 having an aperture lever 252 and an electromagnetic aperture unit 250C having an aperture drive unit 233C. .

For example, the interchangeable lens 200C is a lens including an electromagnetic diaphragm unit 250C (EMD (Electro-magnetic Diaphragm). The electromagnetic diaphragm unit 250C includes a diaphragm mechanism 251C and a diaphragm driving unit 233C.
The aperture drive unit 233C electrically changes and changes the aperture diameter (opening and aperture value) of the aperture mechanism 251C under the control of the optical system control unit 211C included in the lens control unit 210C. The aperture driving unit 233C includes, for example, an aperture driving actuator.
When the adapter 300 controls the diaphragm mechanism 251C in the configuration shown in this figure, the adapter controller 310 drives the diaphragm by communicating with the lens controller 210C instead of controlling the diaphragm interlocking lever driver 330. The diaphragm mechanism 251C is controlled via the part 233C.
As a result, the interchangeable lens 200C can be connected to the camera body 100 via the adapter 300, and the camera control unit 110 communicates with the lens control unit 210C via the adapter control unit 310. 200C can function.
This interchangeable lens 200C is also referred to as an electromagnetic diaphragm type CPU lens in the following description.

(Standard-compliant lens)
FIG. 7 is a schematic block diagram showing an example of the configuration of the camera system 1A when the lens side mount 201A of the interchangeable lens 200A and the camera body side mount 101 of the camera body 100 are lens mounts having the same specifications. is there.
That is, the interchangeable lens 200 </ b> A is a lens that conforms to the lens mount specification and communication standard of the camera body 100 and can be directly connected to the camera body 100 and functioned without using the adapter 300.
In the figure, parts corresponding to those in FIG. 3 or FIG.

Each part of the optical system 220A and the optical system driving unit 230A in FIG. 7 has the same configuration as each part of the optical system 220 and the optical system driving unit 230 in FIG. 3 or FIG. Each part of the aperture unit 250A has the same configuration as the aperture unit 250C in FIG.
The specification of the lens side mount 201A of the interchangeable lens 200A is a specification that can be attached to the camera body side mount 101 of the camera body 100.
The connection part 201As of the lens side mount 201A includes twelve connection terminals Te1 to Te12 as connection terminals connected to the connection terminals of the connection part 101s included in the camera body 100. When the interchangeable lens 200A and the camera body 100 are connected via the connection part 201As and the connection part 101s, the terminals Te1 to Te12 of the connection part 201As are connected to the terminals Ta1 to Ta12 of the connection part 101s, respectively. It is connected to the corresponding connection terminal among the connection terminals. The connecting portion 201As and the connecting portion 101s are electrically connected.

The terminal Te2 is connected to the terminal Ta2 of the camera body 100, and the voltage of the power system power supply PWR is supplied from the camera body 100. The voltage of the power system power supply PWR supplied to the terminal Te2 is the voltage of the lens drive system power supply supplied to the optical system drive unit 230A of the interchangeable lens 200A (the voltage of the lens drive system power supply Vp supplied to the interchangeable lens 200). Equivalent voltage).
The terminal Te3 is connected to the terminal Ta3 of the camera body 100, and the voltage of the control system power supply Vcc is supplied from the camera body 100. The voltage of the control system power supply Vcc supplied to the terminal Te3 corresponds to the voltage of the lens control system power supply supplied to the lens control unit 210A of the interchangeable lens 200A (the voltage of the lens control system power supply Vc supplied to the interchangeable lens 200). Voltage).

The lens control unit 210A includes an optical system control unit 211A, a first lens communication unit 212A, and a second lens communication unit 213A. The optical system control unit 211A controls the optical system drive unit 230A and the aperture drive unit 233A of the aperture unit 250A.
The first lens communication unit 212A and the first camera communication unit 112 perform communication of the first data communication system D1b via four types of signal lines of signals RDY, CLK1, DATAB, and DATAL. In addition, the second lens communication unit 213A and the second camera communication unit 113 perform communication of the second data communication system D2b via four types of signal lines of signals HREQ, HANS, HCLK, and HDATA.

Thus, the interchangeable lens 200A is supplied with the voltage of the power system power supply PWR from the camera body 100 as the voltage of the lens drive system power supply and the voltage of the control system power supply Vcc as the voltage of the lens control system power supply. The first lens communication unit 212A and the first camera communication unit 112 have the same communication standard and perform command data communication. The second lens communication unit 213A and the second camera communication unit 113 have the same communication standard and perform hotline communication.
Thereby, the interchangeable lens 200A can be directly connected to the camera body 100 without using the adapter 300, and the camera control unit 110 causes the interchangeable lens 200A to function by communicating with the lens control unit 210A. be able to.
This interchangeable lens 200A is also referred to as a standard-compliant lens in the following description.

<Description of state transition>
Next, processing according to the present embodiment will be described.
First, the outline of the state transition according to the present embodiment will be described with reference to FIG.
FIG. 8 is a flowchart showing an overview of the state transition of the process related to the interchangeable lens according to the present embodiment.

First, when the main power of the camera body 100 is turned on with respect to the camera body 100, or when the adapter 300 is attached in a state where the main power of the camera body 100 is turned on, the adapter 300 is Under the control of the body 100, a “lens activation process” is executed (step S100).
Here, the “lens activation process” includes, for example, an attachment / detachment determination process of the camera body 100 with respect to the camera body side mount 101, an initialization process of the adapter 300 and the interchangeable lens 200 attached to the adapter 300, and power supply of each power supply system. Control processing, etc. Further, for example, in this lens activation process, the camera body 100 acquires information on the type and specification (function) of the interchangeable lens 200 attached to the camera body 100 via the adapter 300. This lens activation process will be described in detail in “Lens Activation Process” (FIG. 12) described later.

When the lens activation process is completed in step S100, the adapter 300 transitions to a “lens steady process” under the control of the camera body 100 (step S200).
The “lens steady process” is, for example, a state in which a photographing process after the lens activation process is completed is possible. In this lens steady process, the camera body 100 executes “steady communication” in which, for example, detection of the mounting state of the interchangeable lens 200 mounted via the adapter 300 and acquisition of information on the optical system are performed in a predetermined cycle. . This lens steady process will be described later with reference to FIGS.

Next, the camera body 100 or the adapter 300 determines whether or not an interrupt request is generated during the lens steady process (step S300). If it is determined in step S300 that there is no interrupt request, the adapter 300 continues the lens steady process under the control of the camera body 100. On the other hand, when it is determined in step S300 that there is an interrupt request, the camera body 100 or the adapter 300 transitions to the requested interrupt process (step S400). Here, the interrupt process is, for example, a shooting start process by a release operation, a process at the time of instantaneous power interruption, a shift to a low power consumption mode, or a power cut-off process by turning off the power. These processes will also be described later.
It should be noted that the process state transition when the standard-compliant lens (for example, the interchangeable lens 200A) is directly attached instead of the adapter 300 being attached to the camera body 100 is the same state transition as in FIG. .

(Explanation of command data communication in regular lens processing)
Next, command data communication executed in the lens steady process (step S200 in FIG. 8) will be described.
FIG. 9 is a diagram illustrating an example of a communication sequence of command data communication in the lens steady process.
This figure shows an example of command data communication taking the camera system 1 in which the interchangeable lens 200 (CPU lens) and the camera body 100 are connected via an adapter 300 as an example. The adapter control unit 310 can periodically perform periodic communication with the camera control unit 110, and by executing this periodic communication, lens control is performed in response to a request from the camera control unit 110. The lens information (such as information on the optical system 220) acquired from the unit 210 is transmitted to the camera control unit 110.

For example, in the “lens steady process” shown in FIG. 9, the first adapter communication unit 312 communicates with the lens control unit 210 included in the interchangeable lens 200 at a cycle Tf (first communication cycle). And the second periodic communication that communicates with the camera control unit 110 included in the camera body 100 at a cycle Tm (second communication cycle) in an asynchronous relationship.
The first adapter communication unit 312 performs communication (first periodic communication) of the first data communication system D1L with the first lens communication unit 212 at a cycle Tf (for example, every 64 msec) (steps S2010 and S2020). .
Here, the communication (first regular communication) of the first data communication system D1L in the lens steady process is referred to as “lens steady communication”. Through this lens steady communication, the first adapter communication unit 312 acquires lens information (information of the optical system 220 (first information)) from the first lens communication unit 212.

The first adapter communication unit 312 generates lens information (information of the optical system 220 (second information)) to be transmitted to the first camera communication unit 112 based on the lens information acquired in step S2010 (step 2). S2015). For example, the first adapter communication unit 312 converts the lens information (such as information on the optical system 220) acquired in step S2010 into data that conforms to the communication standard of the first data communication system D1b, and performs first conversion. Information to be transmitted to the camera communication unit 112 is generated.
Similarly, the first adapter communication unit 312 generates and converts the information to be transmitted to the first camera communication unit 112 based on the lens information (such as information on the optical system 220) acquired in step S2020 (step S2025). ).
That is, the first adapter communication unit 312 generates lens information (information of the optical system 220 and the like) to be transmitted to the first camera communication unit 112 according to the communication timing of the lens steady communication (communication timing of the cycle Tf).

The first adapter communication unit 312 is asynchronous with the communication (first regular communication) cycle Tf with the interchangeable lens 200 in the first data communication system D1L with respect to the communication of the first data communication system D1L described above. The communication (second periodic communication) of the first data communication system D1b is executed with the first camera communication unit 112 at a period Tm (for example, every 16 msec) (steps S1010, S1015, S1020, S1025). This communication cycle Tm is a communication cycle faster than the communication cycle Tf.
Here, communication (second regular communication) of the first data communication system D1b in the lens steady process is referred to as “steady communication”. This steady communication includes a lens attachment / detachment detection process (lens attachment / detachment detection) and a steady data communication process (hereinafter, “steady data communication”).
The lens attachment / detachment detection process in each step is a process in which the first adapter communication unit 312 responds a detection result in response to a lens attachment / detachment detection instruction command from the first camera communication unit 112. The first adapter communication unit 312 detects the attachment / detachment of the interchangeable lens 200 based on whether there is a response to the steady lens communication from the first lens communication unit 212 and transmits the detection result to the first camera communication unit 112. .

The steady data communication in each step is a communication process in which the first camera communication unit 112 acquires lens information (such as information on the optical system 220) generated by the first adapter communication unit 312. That is, in steady data communication, the first camera communication unit 112 transmits a request command for requesting transmission of lens information (information of the optical system 220, etc.) to the first adapter communication unit 312 and receives it. Based on a response from the first adapter communication unit 312 (transmission from the adapter to the camera side), lens information (information of the optical system 220, etc.) from the interchangeable lens 200 via the adapter 300 is received (acquired). Since this request command is periodically transmitted in the steady data communication, the first camera communication unit 112 repeatedly performs the lens information acquisition (reception) operation every time the steady data communication is performed.
For example, the first camera communication unit 112 obtains the lens information (information of the optical system 220 / first information) acquired by the first adapter communication unit 312 before the lens steady communication in step S2010 by the steady data communication in step S1010. The lens information (second information) generated based on the above is acquired. In addition, the first camera communication unit 112 obtains lens information (information of the optical system 220 / first information) acquired by the first adapter communication unit 312 in the lens steady communication in step S2010 through the steady data communication in steps S1015 and S1020. The lens information (second information) generated based on the above is acquired. In addition, the first camera communication unit 112 generates a lens based on the lens information (such as information on the optical system 220) acquired by the first adapter communication unit 312 in the lens steady communication in step S2020 through the steady data communication in step S1025. Get information.
That is, the first adapter communication unit 312 transmits (responds) the lens information generated as described above to the first camera communication unit 112 at the period Tm of steady data communication.

As described above, in the command data communication, the adapter control unit 310 uses the camera control unit based on the lens information (information of the optical system 220 / first information) from the interchangeable lens 200 acquired by the lens steady communication with the period Tf. Lens information (second information) to be transmitted to 110 is generated. In addition, the adapter control unit 310 transmits the generated lens information (second information) to the camera control unit 110 by steady data communication with a period Tm.
As a result, the adapter control unit 310 ensures that the lens information acquired by the lens steady communication with the cycle Tf is generated without delay in the camera control unit 110 through the steady data communication with the cycle Tm that is asynchronous with the cycle Tf. Can be sent to.
Therefore, the adapter control unit 310 can transmit the lens information acquired from the lens control unit 210 to the camera control unit 110 without delay in response to a request from the camera control unit 110 by communicating with the camera control unit 110. it can.

9, lens information (such as information on the optical system 220) to be transmitted to the first camera communication unit 112 in accordance with the communication timing of the lens steady communication (communication timing of the cycle Tf) is used as the first adapter communication. Although the process which the part 312 produces | generates was demonstrated, it is not restricted to this. For example, the first adapter communication unit 312 generates lens information (such as information on the optical system 220) to be transmitted to the first camera communication unit 112 according to the communication timing of regular data communication (communication timing of the cycle Tm). Also good.
As a result, the adapter control unit 310 determines the camera control unit according to the timing of the cycle Tm that is asynchronous with respect to the cycle Tf from the lens information (information of the optical system 220, etc.) acquired by the lens steady communication with the cycle Tf. The lens information to be transmitted to 110 can be generated, and the generated lens information can be transmitted to the camera control unit 110 by steady data communication.

  In addition, with reference to FIG. 9, the first adapter communication unit 312 has described a process in which the cycle Tf of communication with the lens control unit 210 and the cycle Tm of communication with the camera control unit 110 are in an asynchronous relationship. However, the cycle Tf and the cycle Tm may be synchronized.

(Explanation of regular lens communication)
Specifically, the “lens steady communication” communicated at the cycle Tf is, for example, a time required for a plurality of communications (for example, 8 communications / one communications) within about 8 ms within one period (eg, 64 ms period). ) To communicate. In this multiple communication, the first adapter communication unit 312 outputs information (setting instruction) from the first adapter communication unit 312 to the lens control unit 210 and communication for acquiring information from the lens control unit 210. Communication.
The first adapter communication unit 312 performs a plurality of times of communication with the first lens communication unit 212 in the steady lens communication, and the lens information (information on the optical system 220 and the aperture unit) from the first lens communication unit 212 each time. 250 information etc./first information). In addition, the first adapter communication unit 312 uses a plurality of lens information acquired at different times among the lens information acquired by a plurality of times of communication, and transmits the lens to the first camera communication unit 112 by steady data communication. Generate information. The first adapter communication unit 312 transmits the generated lens information (second information) to the first camera communication unit 112 in response to a request from the first camera communication unit 112.
FIG. 10 is a diagram illustrating an example of a communication command that is divided into a plurality of times of communication within one period of the regular lens communication.
As shown in this figure, the lens steady communication has, for example, communication commands D1 to D8 for transmitting and receiving communication data, and is sequentially communicated during one period of the lens steady communication. In the example shown in this figure, communication is performed eight times by sequentially communicating the communication commands D1 to D8 of the lens steady communication within a period of one cycle.

The communication commands D1 to D8 for transmitting or receiving communication data in the regular lens communication include a command for the adapter 300 to acquire lens information regarding the interchangeable lens 200 from the interchangeable lens 200 side, and an interchangeable lens 200 from the adapter 300 side. There is a command for sending information and instructions (setting instructions) to the side. Examples of commands for acquiring information related to the interchangeable lens 200 include communication commands D1, D4, and D5 for communicating information on the optical system 220 and information indicating a driving state, and a communication command D6 for acquiring information related to an electromagnetic diaphragm. Further, as a command for sending information or an instruction (setting instruction) to the interchangeable lens 200 side, information indicating the operation state of the camera body 100 (for example, information indicating whether or not a half-press operation has been performed on the release button) is communicated. Communication command D2 for communication, communication command D3 for communicating setting information (setting instruction) for hotline communication, and communication commands D7 and D8 for communicating instructions (setting instruction) for image stabilization control (control of VR lens 223). The functions of the interchangeable lens differ depending on the specifications of the interchangeable lens (the interchangeable lens 200 or other interchangeable lenses). A communication command selected from D8 is communicated.
For example, unnecessary communication commands are not communicated depending on the specifications (functions) of the interchangeable lens, such as the presence or absence of the VR lens 223 (presence or absence of an anti-vibration function) or the presence or absence of an electromagnetic diaphragm function.

That is, the first adapter communication unit 312 acquires the information of the optical system 220 by dividing the information of the optical system 220 into a plurality of pieces of information by a plurality of times of communication, and collects the information corresponding to the plurality of pieces of information acquired by the division. Information on the optical system 220 is generated.
Note that the information corresponding to a plurality of pieces of information is information obtained by data conversion of the plurality of pieces of information according to a communication standard or the like.
The first adapter communication unit 312 includes eight types of communication commands D1 to D8 within one cycle of the regular lens communication (as described above, four types of communication commands D2, D3, D7, and D8 are transmitted to the interchangeable lens 200 side. Are commands for communicating information and instructions, and the remaining four types of communication commands D1, D4, D5, and D6 are sequentially communicated information for obtaining information from the interchangeable lens 200) Information on the aperture unit 250 and other various lens information are acquired (received) by dividing them into four types of information (divided into four times), and at the same time, four types of information and instructions are divided into the interchangeable lens 200. To send. In addition, the first adapter communication unit 312 generates information of the optical system 220 to be transmitted to the first camera communication unit 112 based on information acquired by dividing every four communications within one cycle. Here, the information of the lens (for example, the optical system 220) generated by the first adapter communication unit 312 within one cycle (in other words, the information transmitted to the first camera communication unit 112) Instead of being generated and transmitted to the camera body 100 at each reception, based on all pieces of information divided and received within one cycle (all lens information divided and received in four steps in this embodiment). The lens information to be transmitted is generated, and the generated lens information is transmitted to the camera body 100. That is, the lens information transmitted to the camera body 100 is not only the pieces of information acquired in a divided manner, but all the received four types (four times) of information (one for the transmission to the camera body 100). (In other words, the adapter 300 does not transmit the lens information received from the interchangeable lens 200 in four times to the camera body 100 in four times, but transmits it to the camera body 100 in one time. 100). With this configuration, the communication frequency between the adapter 300 and the camera body 100 can be suppressed, and the processing burden on both control units (the adapter control unit 310 and the camera control unit 110) can be reduced.

The first adapter communication unit 312 is based on lens information (for example, information on the optical system 220) acquired by “lens steady communication” (see FIG. 9) based on a predetermined format. ”(See FIG. 9), lens information (information of the optical system 220) to be transmitted to the first camera communication unit 112 is generated.
Here, the predetermined format is a format determined in advance by the communication standard of command data communication in the first data communication system D1b between the first adapter communication unit 312 and the first camera communication unit 112. Thus, the format of the data structure for transmitting information of the optical system 220 is defined. For example, as the information of the optical system 220, data configuration rules such as information indicating the type of the optical system 220, information indicating the driving state of the focus lens 222, and information indicating the driving state of the VR lens 223 are defined.

As described above, the first adapter communication unit 312 divides the lens information (information of the optical system 220) obtained by dividing into a plurality of pieces of information by a plurality of communications in the “lens steady communication” based on a predetermined format. The information is converted into information (collected as one) and transmitted by one communication in “steady data communication”. That is, the first adapter communication unit 312 converts communication data transmitted / received in the “lens steady communication” communication format into communication data transmitted / received in the “steady data communication” communication format.
Therefore, the adapter 300 can acquire information of the optical system 220 of the interchangeable lens 200 and transmit it to the camera body 100 by being mounted between the camera body 100 and the interchangeable lens 200 having different communication standards. .
In the above-described embodiment, an example in which all pieces of lens information acquired in a plurality of times are collectively transmitted to the camera body 100 has been described. However, all of the lens information may not necessarily be used. For example, some (for example, two times or three times) received from a plurality of times (four times in the above) may be selected, and the selected information may be transmitted together.
In addition, the adapter 300 transmits the lens information acquired from the lens 200 in accordance with a request command from the camera body 100 (analyzing the request command), in addition to matching the communication format of “steady data communication”. Since it is configured to transmit in combination with the content to be transmitted (so as to meet the request from the camera body 100), various request commands from the camera body 100 can be handled.

(Communication processing for detecting the drive state of the drive element (or optical system drive unit) of the interchangeable lens)
Next, the communication process of the drive state of the drive element (the optical system 220 and the aperture unit 250) of the interchangeable lens 200 or the optical system drive unit 230 will be described.
The adapter control unit 310 receives a control command output from the camera control unit 110 (for example, received by the first receiving unit of the first adapter communication unit 312), and the content of the received control command (first receiving unit). Lens control command for controlling the driving of the optical system driving unit 230 (in other words, driving elements such as the optical system 220 and the diaphragm 250 in the interchangeable lens 200) in accordance with the received content at the lens control unit. 210 (for example, the first transmission unit of the first adapter communication unit 312 transmits). In addition, after transmitting the lens control command, the adapter control unit 310 receives state information indicating the driving state of the optical system driving unit 230 from the lens control unit 210 (for example, the second reception of the first adapter communication unit 312). And the state information indicating the driving state of the driving element is transmitted to the camera control unit 110 based on the received content (the content received by the second receiving unit) (for example, the first adapter communication unit 312). The second transmission unit transmits).
That is, the adapter control unit 310 transmits a lens control command for the optical system driving unit 230 to the lens control unit 210 and then receives state information indicating the driving state of the optical system driving unit 230 from the lens control unit 210. The state information is transmitted to the camera control unit 110.
However, when the adapter control unit 310 transmits a lens control command (first lens control command) for instructing the driving start of the drive element to the lens control unit 210 (for example, transmitted from the first transmission unit). In this case, the state information indicating that the drive element is being driven is transmitted to the camera control unit 110 (transmitted from the second transmission unit) regardless of reception by the second reception unit.

  For example, when the lens control unit 210 receives a lens control command for starting driving from the adapter control unit 310, the lens control unit 210 drives the optical system driving unit 230 according to the instruction of the control command. In addition, the lens control unit 210 transmits state information indicating that the drive element in the interchangeable lens 200 is “driven” to the adapter control unit 310 in response to the start of driving of the optical system drive unit 230.

Here, the adapter control unit 310 waits to receive this state information from the lens by lens steady communication, and then transmits the received state information to the camera control unit 110 by steady data communication. It takes time to transmit the status information indicating that the optical system driving unit 230 is being driven to the camera control unit 110 with respect to the timing at which the driving of the optical system driving unit 230 is started (that is, during driving). The reception timing may be delayed).
This is because the steady lens communication and the steady data communication are asynchronous with each other, and the communication is performed at different periods. Further, the adapter control unit 310 needs data conversion processing to relay communication between the lens steady communication and the steady data communication, which are different communication standards.
As described above, the adapter control unit 310 has a time lag between the timing when the driving of the optical system driving unit 230 is started and the timing when the camera control unit 110 receives the state information indicating “driving”. Occurs. That is, in the camera control unit 110, there is a period in which the status information indicating “driving” cannot be received even though the optical system driving unit 230 is already being driven.

In order to reduce the above-described time lag, the adapter control unit 310 transmits a lens control command (first lens control command) for starting driving to the optical system driving unit 230 to the lens control unit 210 (for example, the first transmission unit). (Without immediately waiting for reception at the second receiving unit) without waiting for a response from the lens control unit 210 (a response of state information indicating the driving state of the driving element). Status information indicating that the camera is in the driving state (status information indicating that the camera is being driven) is transmitted to the camera control unit 110.
The accessor control unit 310 according to the present embodiment is configured to transmit the state information indicating “driving” to the camera control unit 110 after transmitting the lens control command indicating the start of driving to the lens control unit 210. did. With regard to this order, for example, the operation sequence of the accessory control unit 310 is improved so that the above-described lens control command is transmitted to the lens control unit 210 and at the same time, the “driving” status information is transmitted to the camera control unit 110. Also good.
On the other hand, when the driving of the optical system driving unit 230 is stopped, the adapter control unit 310 obtains a response (state information) indicating that the optical system driving unit 230 is in a stopped state from the lens control unit 210. The state information indicating the “driving stop state” is transmitted to the camera control unit 110. That is, when stopping the optical system drive unit 230, the adapter control unit 310 confirms the actual stop state (after receiving a response indicating that from the lens control unit 210), and then the camera control unit. Response to 110 is made.

FIG. 11 is a diagram illustrating an example of a communication sequence for detecting the driving state of the optical system driving unit 230 (or the above-described driving element).
With reference to this figure, the process in which the adapter control part 310 communicates the drive state of the optical system drive part 230 (or the above-mentioned drive element) is demonstrated.
The first camera communication unit 112 performs steady data communication with the first adapter communication unit 312 at a cycle Tm (steps S1032, S1036, S1038, and S1040). The first adapter communication unit 312 performs lens steady communication with the first lens communication unit 212 at a cycle Tf (steps S2034 and S2038).

  First, when the camera control unit 110 controls the optical system drive unit 230 included in the interchangeable lens 200, the first camera communication unit 112 sends a lens control command for controlling the optical system drive unit 230 to the first adapter communication unit. It transmits to 312 (step S1030). For example, the first camera communication unit 112 transmits a lens control command (drive start command) for moving the position of the focus lens 222 to the target position.

  Next, the first adapter communication unit 312 converts the received lens control command (drive start command) into a lens control command (drive start command) transmitted to the first lens communication unit 212, and converts the converted lens control command. (Drive start command) is transmitted to the first lens communication unit 212 (step S2030). Further, the first adapter communication unit 312 sets the drive state to “driving” without detecting the drive state of the optical system drive unit 230 after transmitting the lens control command to the first lens communication unit 212 ( Step S2032). For example, the first adapter communication unit 312 sets the state information indicating the driving state of the focus lens 222 to “being driven” in response to a lens control command for moving the position of the focus lens 222 to the target position.

  The first adapter communication unit 312 responds to the first camera communication unit 112 with the state information set to “being driven” by steady data communication (step S1032). The first camera communication unit 112 detects that the state information is “driving” by the steady data communication in step S1032 (step S1035).

Also, the first lens communication unit 212 receives the lens control command transmitted from the first adapter communication unit 312 in step S2030. Based on the lens control command (drive start command), the optical system control unit 211 of the lens control unit 210 controls the optical system drive unit 230 to start driving (step S3030). For example, the optical system control unit 211 controls the optical system drive unit 230 to start driving the focus lens 222 in accordance with a lens control command for moving the position of the focus lens 222 to the target position.
In addition, the optical system control unit 211 controls the optical system driving unit 230 to start driving the focus lens 222, and the driving state of the focus lens 222 drives the state information included in the interchangeable lens 200. It is set to “Driving” indicating that it is in the middle (step S3032).

  Next, the first lens communication unit 212 responds to the “driving” state information set by the optical system control unit 211 in step S3032 through lens steady communication (step S2034). Then, the first adapter communication unit 312 acquires the “driving” state information responded by the lens steady communication (step S2036). Note that in step S2036, the first adapter communication unit 312 only acquires the “driving” status information, and does not transmit it to the first camera communication unit 112.

Subsequently, when the movement of the focus lens 222 to the target position is completed, the optical system control unit 211 controls the optical system drive unit 230 to stop driving the focus lens 222 (step S3034). Further, in response to stopping the driving, the optical system control unit 211 sets the state information included in the interchangeable lens 200 to “driving stop” indicating that the driving state of the focus lens 222 is the driving stop state. (Step S3036).
Next, the first lens communication unit 212 responds to the “drive stop” state information set by the optical system control unit 211 in step S3036 by lens steady communication (step S2038). Then, the first adapter communication unit 312 acquires the “drive stop” state information responded by the lens steady communication (step S2040).

  The first adapter communication unit 312 responds to the first camera communication unit 112 with the status information set to “stop driving” by steady data communication (step S1040). The first camera communication unit 112 detects that the state information is “driving stop” by the steady data communication in step S1040 (step S1045).

As described above, the first adapter communication unit 312 transmits the drive start control command to the optical system drive unit 230 to the first lens communication unit 212 and then waits for a response from the first lens communication unit 212 without driving. Status information indicating the status (status information indicating that the camera is being driven) is transmitted to the first camera communication unit 112.
In addition, when the driving of the optical system driving unit 230 is stopped, the first adapter communication unit 312 acquires the response indicating that the optical system driving unit 230 is in the stopped state from the first lens communication unit 212, and then drives. Status information indicating the status is transmitted to the first camera communication unit 112.
Thereby, the first adapter communication unit 312 is from the timing when the driving of the optical system driving unit 230 is started to the timing when the first camera communication unit 112 receives the state information indicating that the driving is in progress. Time lag can be reduced.
Therefore, in the first camera communication unit 112, it is possible to prevent a period during which the state information indicating that the optical system driving unit 230 is being driven cannot be received even though the optical system driving unit 230 is being driven. Further, when the driving of the optical system driving unit 230 is stopped, the first adapter communication unit 312 can transmit the state information to the first camera communication unit 112 after confirming that the driving is stopped.

(Lens activation process)
Next, the lens activation process (the process in step S100 in FIG. 8) will be described.
First, an outline of the lens activation process will be described.
When the supply of the voltage of the control system power supply Vcc1 is started from the camera body 100 (after power supply to the adapter control section 310 from the control system power supply Vcc1 is started), the adapter control unit 310 is the voltage of the power system power supply PWR. A power system power supply PWR request signal for requesting the start of supply is transmitted to the camera body 100. That is, after receiving the voltage of the control system power supply Vcc1 from the camera body 100, the adapter control unit 310 transmits to the camera body 100 a power system power supply PWR request signal for requesting the start of power supply from the power system power supply PWR. .
Further, the adapter control unit 310 controls the lens driving system power supply Vp that supplies a voltage to the interchangeable lens 200 from the voltage of the power system power supply PWR supplied from the camera body 100 in response to the power system power supply PWR request signal and the lens control. The adapter power supply 320 generates the voltage of the system power supply Vc. Note that the adapter control unit 310 causes the adapter power supply unit 320 to generate the voltage of the lens drive system power supply Vp and the voltage of the lens control system power supply Vc after the power supply from the power system power supply PWR is started. Supply.

For example, the adapter control unit 310 causes the adapter power supply unit 320 to supply the interchangeable lens 200 with the voltage of the lens control system power supply Vc after the power supply from the power system power supply PWR is started (lens control system power supply). Power supply from Vc is started). Subsequently, the adapter control unit 310 supplies the voltage of the lens control system power supply Vc from the adapter power supply unit 320 to the interchangeable lens 200 and then supplies the voltage of the lens drive system power supply Vp to the interchangeable lens 200.
Specifically, the adapter control unit 310 requests the interchangeable lens 200 to start supplying the voltage of the lens drive system power supply Vp in response to the supply of the voltage of the lens control system power supply Vc to the interchangeable lens 200. When the lens drive system power supply Vp request signal shown is received, the voltage of the lens drive system power supply Vp is supplied from the adapter power supply unit 320 to the interchangeable lens 200.

Further, after the supply of the voltage of the control system power supply Vcc1 is started from the camera body 100, the adapter control unit 310 executes an initialization process according to a control instruction from the camera control unit 110. For example, the adapter control unit 310 executes a process for initializing the state of the interchangeable lens 200 as an initialization process (requested from the interchangeable lens 200). That is, the adapter control unit 310 performs processing for initializing the state of the interchangeable lens 200 after supplying power to the interchangeable lens 200 (supplying power to the interchangeable lens 200 from the lens system power supply system). (Required for the interchangeable lens 200).
The process for initializing the state of the interchangeable lens 200 includes a lens control unit initialization process for initializing the lens control unit 210.
For example, the adapter control unit 310 detects whether or not the interchangeable lens 200 is attached to the adapter 300 by supplying power to the interchangeable lens 200 as an initialization process. Then, after detecting that the interchangeable lens 200 is attached to the adapter 300, the adapter control unit 310 executes a lens control unit initialization process for initializing the lens control unit 210.

Next, details of the lens activation process of the camera system 1 will be described.
FIG. 12 is a diagram illustrating an example of a processing sequence of lens activation processing. This figure shows an example of lens activation processing when the main power supply of the camera body 100 is turned on.
The lens activation process includes attachment / detachment determination (step S110), information exchange between the camera body 100 and the adapter 300 (step S120), initialization (step S130), lens information acquisition (step S160), and lens function start (step S170). ) In this order. In the initialization (step S130), as the processing performed by the adapter 300 for the interchangeable lens 200, the attachment determination processing (step S140) and the lens initialization processing (step S150) are sequentially executed.
In this activation process, the communication executed by the camera body 100 with the interchangeable lens 200 via the adapter 300 is command data communication.

First, attachment / detachment determination (step S110) is processing for determining whether or not the adapter 300 (or the interchangeable lens 200A) is attached when the camera body 100 starts to supply power to the adapter 300 from the control system power supply Vcc1. .
When the main power supply of the camera body 100 is turned on, the camera control unit 110 controls the camera power supply unit 120 to supply (power feed) the voltage of the control system power supply Vcc1 to the adapter 300 (step S1110). As a result, the adapter control unit 310 is supplied with the voltage of the control system power supply Vcc1. The adapter control unit 310 performs an adapter activation process in response to the supply of the voltage of the control system power supply Vcc1, and notifies the first camera communication unit 112 from the first adapter communication unit 312 that communication is possible (step S2110). ). For example, the first adapter communication unit 312 controls the signal RDY to H (high) level in response to the supply of the voltage of the control system power supply Vcc1, and controls the signal RDY to L (low) level by adapter activation processing. To do. And the 1st camera communication part 112 acquires mounting information by detecting the falling edge of the signal level of signal RDY (step S1112).

  Accordingly, the camera control unit 110 determines whether or not the adapter 300 is attached based on the attachment information acquired by the first camera communication unit 112 (step S1114). For example, the camera control unit 110 performs attachment / detachment determination based on attachment information indicating whether or not a falling edge of the signal level of the signal RDY is detected.

If it is determined in step S1114 that the adapter 300 is attached to the camera body 100, the camera control unit 110 advances the processing to information exchange (step S120) between the camera body 100 and the adapter 300.
Even when a standard-compliant lens (for example, the interchangeable lens 200A) is directly attached to the camera body 100 without the adapter 300, the camera control unit 110 similarly proceeds to step S120. In this case, the processing in step S120 is information exchange processing between the camera body 100 and the interchangeable lens 200A.
If it is determined in step S1114 that the camera body 100 is not attached, the camera control unit 110 determines that either the adapter 300 or the interchangeable lens 200A is not attached to the camera body 100.

In the information exchange between the camera body 100 and the adapter 300 in step S120, the following processing is performed.
The first camera communication unit 112 establishes communication (command data communication) with the first adapter communication unit 312. And the 1st camera communication part 112 and the 1st adapter communication part 312 mutually communicate and acquire information, such as identification ID of the camera body 100 and the adapter 300, a name, and a firmware version. The first adapter communication unit 312 transmits a power system power supply PWR request signal for requesting the start of supply of the voltage of the power system power supply PWR to the first camera communication unit 112 (steps S1120 and S2120).

Subsequently, initialization (step S130) is performed. This initialization process is a process in which the voltage of the power system power supply PWR is supplied from the camera body 100 and the adapter 300 and the interchangeable lens 200 are initialized.
First, when the power system power supply PWR request signal is received by the first camera communication unit 112, the camera control unit 110 controls the switch 125 to be in a conductive state and supplies the voltage of the power system power supply PWR from the battery 190 to the adapter 300. (Power feeding) is performed (step S1130).

Next, the first camera communication unit 112 transmits an initialization execution command as an initialization request to the first adapter communication unit 312 (step S1140).
When the initialization execution command is received by the first adapter communication unit 312, the adapter control unit 310 executes a mounting determination process (step S 140) and a lens initialization process (step S 150).

The attachment determination process (step S140) is an interchangeable lens attachment determination process for the adapter 300.
The adapter control unit 310 generates a voltage of the lens control system power supply Vc in the adapter power supply unit 320 and supplies (powers) the interchangeable lens 200 with it. Next, the first adapter communication unit 312 performs a lens mounting determination process through communication with the first lens communication unit 212, and determines whether or not an interchangeable lens is mounted. When the interchangeable lens 200 is attached, the first lens communication unit 212 transmits a lens driving system power supply Vp request signal to the first adapter communication unit 312 (steps S2140 and S3140). Then, the adapter controller 310 advances the process to the lens initialization process (step S150).

The lens initialization process (step S150) is an initialization process for the adapter 300 and the interchangeable lens 200.
When the first adapter communication unit 312 receives the lens drive system power supply Vp request signal, the adapter control unit 310 causes the adapter power supply unit 320 to generate the voltage of the lens drive system power supply Vp and supply (power supply) the interchangeable lens 200. Let Next, the first adapter communication unit 312 performs lens initialization processing through communication with the first lens communication unit 212 (steps S2150 and S3150). Here, the reason why the lens driving system power supply Vp is not supplied from the adapter 300 side to the interchangeable lens 200 side is as follows. Some interchangeable lenses do not require power supply (for example, manual focus lenses). Generating the lens driving system power supply Vp and performing the power supply operation when such an interchangeable lens is attached causes unnecessary work to the adapter 300 side. Therefore, in this embodiment, the power supply procedure is determined in order to prevent the adapter 300 from performing unnecessary work.

  Next, when the initialization of the adapter 300 and the interchangeable lens 200 is completed, the first camera communication unit 112 sets “initialization completed” as information indicating that the initialization is completed as a response result to the initialization confirmation command. Received from the first adapter communication unit 312. Thereby, the camera control unit 110 acquires initialization completion information (step S1150).

  When the initialization is completed, the camera control unit 110 determines whether or not the adapter 300 is attached based on the information acquired in the information exchange between the camera body 100 and the adapter 300 in step S1120 (step S1155). ). If it is determined in step S1155 that the adapter 300 is not attached, the camera control unit 110 attaches a standard conforming lens (for example, the interchangeable lens 200A) directly to the camera body 100 without using the adapter 300. It is determined that On the other hand, if it is determined in step S1155 that the adapter 300 is attached, the camera control unit 110 proceeds to the lens information acquisition (step S160) process.

The lens information acquisition (step S160) processing is processing for determining whether or not the interchangeable lens is attached to the adapter 300, and acquiring information about the interchangeable lens 200 attached to the adapter 300. The information of the interchangeable lens 200 is, for example, lens information such as a lens type, presence / absence of a hotline communication function, presence / absence of an anti-vibration function, presence / absence of an electromagnetic diaphragm, open F value, focal length information, and the like.
The first camera communication unit 112 transmits a lens information acquisition command to the first adapter communication unit 312, receives a lens information response from the first adapter communication unit 312, and acquires information of the interchangeable lens 200 ( Step S1160, Step S2160).

Next, the camera control unit 110 determines the type (type) of the interchangeable lens 200 based on the lens information acquired in the lens information acquisition (step S160) (step S1165). For example, the camera control unit 110 determines whether or not the CPU lens is mounted on the adapter 300 based on the determination result of the mounting determination process (step S140).
If it is determined in step S1165 that the CPU lens is not mounted, it is determined that the CPU lens is not mounted, and the process is terminated.
On the other hand, if it is determined in step S1165 that the CPU lens is attached, the process proceeds to lens function start (step S170).
Further, the camera control unit 110, for example, based on the acquired lens information, for example, a lens having an AF control (processing) function, a lens having a VR lens 223 control (processing) function (anti-vibration control function), or It is determined whether the lens is an electromagnetic diaphragm type lens.

The lens function start process (step S170) is a process for starting each function according to the type (function) of the interchangeable lens based on the lens information acquired in the lens information acquisition process (step S160). The first camera communication unit 112 communicates with the first lens communication unit 212 via the first adapter communication unit 312, for example, acquisition of a lens control table, hotline communication permission setting, image stabilization control start setting, etc. Processing is performed (step S1170, step S2170, step S3170).
Then, the camera control unit 110 is activated by determining that the CPU lens is attached, and ends the process.

  Thus, the adapter control unit 310 is activated in response to the supply of the voltage of the control system power supply Vcc1 from the camera body 100, and requests the camera body 100 to start supplying the voltage of the power system power supply PWR. Further, the adapter control unit 310 generates the voltage of the lens control system power supply Vc supplied from the power system power supply PWR to the interchangeable lens 200 in response to the supply of the power system power supply PWR voltage from the camera body 100. Further, the adapter control unit 310 supplies the lens control system power supply Vc voltage to the interchangeable lens 200, so that when the interchangeable lens 200 is requested to supply the lens drive system power supply Vp, the adapter control unit 310 receives the lens from the power system power supply PWR. A voltage of the driving system power supply Vp is generated and supplied to the interchangeable lens 200.

Accordingly, the adapter control unit 310 can generate a voltage to be supplied to the interchangeable lens 200 based on the voltage supplied from the camera body 100 and appropriately control the voltage supply start timing of each power supply system. it can.
Further, the adapter control unit 310 can determine the specification of the interchangeable lens 200 in the lens activation process, and supply a voltage to the interchangeable lens 200 based on the determined specification. Further, the adapter control unit 310 can stop the supply of voltage to the interchangeable lens in the case of an interchangeable lens that does not require voltage supply based on the determined specification of the interchangeable lens.

(Details of initialization processing in lens startup processing)
Next, the initialization (step S130) in the lens activation process described with reference to FIG. 12 will be described in detail with reference to FIG.
FIG. 13 is a diagram illustrating an example of a processing sequence of an initialization process in the lens activation process. In FIG. 13, processes corresponding to the processes in FIG. 12 are assigned the same reference numerals, and descriptions thereof are omitted.

  After supplying the voltage of the power system power supply PWR (step S1130), the first camera communication unit 112 transmits an initialization execution command to the first adapter communication unit 312 as an initialization request (step S1140). Thereafter, the first camera communication unit 112 sends an initialization completion confirmation command (steps S1145a, S1145b, S1145c,...) For detecting the completion of the initialization process by the adapter 300 to the first adapter communication unit 312. It transmits repeatedly and waits for the response of "initialization completion" from the 1st adapter communication part 312 (step S1145).

For example, the first camera communication unit 112 sends an initialization completion confirmation command to the first adapter communication unit 312 with a period Ts until a response of “initialization completion” is acquired (or in advance for time-out processing). (Same period) Send repeatedly. The communication cycle Ts of the initialization completion confirmation command is a time interval shorter than the cycle Tm of steady data communication described with reference to FIG. That is, the first adapter communication unit 312 performs a process of transmitting information indicating whether or not the initialization process has been completed (a process of responding to the initialization completion confirmation command) at a time interval shorter than the period Tm of steady data communication. It performs with respect to the control part 110. FIG. That is, whether or not the initialization process has been completed is detected by the camera control unit 110 at a time interval shorter than the period Tm of steady data communication. In this way, by speeding up the interval (cycle) for confirming completion of initialization, the processing to be performed after completion of initialization can be started at an early stage, and the time required for starting up the apparatus and system can be shortened. I can do it.
The first adapter communication unit 312 is information indicating that the initialization is not completed in response to the initialization completion confirmation command repeatedly transmitted from the first camera communication unit 112 until the initialization is completed. As “Initialization” as an initialization state.
In this figure, the first camera communication unit 112 obtains a “initialization complete” response from the response result to the initialization completion confirmation command in step S1145n.
As a result, the first camera communication unit 112 can detect whether or not the initialization process of the adapter 300 has been completed at a period of a time interval that is earlier than the period of the steady data communication.

  When the initialization execution command is received by the first adapter communication unit 312, the adapter control unit 310 performs an initialization process for each unit included in the adapter 300 (step S 2130). This is, for example, a process of resetting the memory in the adapter control unit 310 of the adapter 300. Next, the adapter control unit 310 controls the aperture interlocking lever driving unit to move the aperture interlocking lever 350 to the retracted position (step S2135).

Subsequently, the adapter control unit 310 advances the process to the lens attachment determination process (step S140). In this lens mounting determination process, the adapter control unit 310 first generates the voltage of the lens control system power supply Vc in the adapter power supply unit 320 and supplies (power feeds) the interchangeable lens 200 (step S2142). Next, the first adapter communication unit 312 determines whether or not there is a response from the first lens communication unit 212 of the interchangeable lens 200 in response to supplying (powering) the lens control system power supply Vc to the interchangeable lens 200. Based on the above, it is determined whether or not the interchangeable lens 200 is mounted, and a mounting determination is made (steps S2144 and S3144).
For example, when there is no response from the first lens communication unit 212, it is determined that the interchangeable lens 200 is not attached to the adapter 300 (the lens is not attached).
On the other hand, when there is a response from the first lens communication unit 212, the first adapter communication unit 312 determines that the interchangeable lens 200 is attached to the adapter 300, and between the adapter 300 and the interchangeable lens 200. In step S2146 and step S3146, information exchange is performed.

In the information exchange communication between the adapter 300 and the interchangeable lens 200, for example, the first adapter communication unit 312 and the first lens communication unit 212 communicate with each other to identify each other, and thus perform normal operation. Check whether communication is possible. In addition, the first adapter communication unit 312 is information indicating lens information for identifying the type of the interchangeable lens 200, and a state of a lens switch (for example, a switch for switching between AF and MF (Manual Focus)) provided in the interchangeable lens 200. Etc.
The first lens communication unit 212 transmits a lens drive system power supply Vp request signal to the first adapter communication unit 312. Then, the adapter controller 310 advances the process to the lens initialization process (step S150).

In the lens initialization process (step S150), when the first adapter communication unit 312 receives the lens drive system power supply Vp request signal, the adapter control unit 310 first converts the lens drive system power supply Vp voltage to the adapter power supply unit 320. And is supplied (powered) to the interchangeable lens 200 (step S2152). Next, the first adapter communication unit 312 transmits a lens initialization execution command for requesting execution of the lens initialization process to the first lens communication unit 212 (step S2154). When the lens initialization execution command is received by the first lens communication unit 212, the lens control unit 210 executes a lens initialization process in accordance with the lens initialization execution command from the first adapter communication unit 312 (step S3154). ).
The lens initialization processing includes processing such as initialization of the lens control unit 210, initialization of AF control (control of the focus lens 222), initialization of image stabilization control (control of the VR lens 223), and the like. In the case of an electromagnetic diaphragm type CPU lens, an initialization process of electromagnetic diaphragm control is also executed in this lens initialization process.
After the lens initialization process is completed, the first adapter communication unit 312 starts regular lens communication with the first lens communication unit 212 (step S2156).

  Next, the adapter control unit 310 executes initialization driving of the aperture interlocking lever 350 (step S2158). For example, the adapter control unit 310 controls the aperture interlocking lever driving unit 330 to execute a process of moving the position of the aperture interlocking lever 350 to a predetermined position. Note that the adapter control unit 310 moves the position of the aperture interlocking lever 350 to a retracted position, an open position, a position stored in the storage unit, or the like according to control conditions, for example.

  Subsequently, in response to the completion of the initialization drive of the aperture interlock lever 350 in step S2158, the first adapter communication unit 312 receives an initialization completion confirmation command (step S1145n) from the first camera communication unit 112. In response, “initialization complete” is returned as the initialization state (step S2159). The first camera communication unit 112 acquires a response of “initialization complete” from the response result to the initialization completion confirmation command in step S1145n (step S1150), and ends the initialization.

  As described above, the adapter control unit 310 initializes each unit included in the adapter 300, determines whether to attach to the adapter 300, and attaches to the adapter 300 according to the initialization execution command from the first camera communication unit 112. Initialization of the state of the interchangeable lens 200 being performed can be executed. Further, the first camera communication unit 112 confirms whether or not the initialization process of the adapter 300 has been completed at a period of time interval (for example, 10 msec) earlier than the period of steady data communication (the period Tm / for example, 16 msec). Can be detected. Therefore, the camera control unit 110 can appropriately detect whether or not the initialization process is completed at an early timing.

(Example of initialization completion response data)
As described with reference to FIG. 13, the adapter control unit 310 requests the interchangeable lens 200 to initialize the state of the interchangeable lens 200, and then initializes the aperture interlocking lever 350 (initialization). Process). In addition, after the lens initialization process for initializing the state of the interchangeable lens 200 is completed, the adapter control unit 310 completes the initialization process according to the initialization execution command transmitted by the first camera communication unit 112. . That is, the lens initialization process is completed before the adapter control unit 310 completes the initialization process (including the movement of the aperture interlock lever 350 to the retracted position).
As a result, the adapter control unit 310 can respond to the first camera communication unit 112 that the initialization is completed after the lens initialization process is completed.

FIG. 14 is a diagram illustrating an example of a data structure in an initialization state in response to an initialization completion confirmation command in command data communication.
For example, in the command data communication, the data in the initialization state that responds to the initialization completion confirmation command is 2-byte data. Of the 2-byte data, the lower 1 byte D10 (bits 0 to 7) is command data indicating that the data is a response to the initialization completion confirmation command. For example, as shown in this figure, “15H” (15H in hexadecimal) data is set in the lower 1 byte D10 as command data for identifying that the data is a response to the initialization completion confirmation command. An example is shown. Further, the upper 1 byte D20 (bits 8 to 15) is data in an initialization state that responds. In the upper 1 byte D20, a bit (aperture interlocking lever initialization completion information) indicating whether or not the initialization process of the aperture interlocking lever 350 in the adapter 300 is completed is set in bit8. In bit 9, a flag (lens initialization completion information) indicating whether or not the initialization processing of the focus lens 222 in the interchangeable lens 200 has been completed is set. In bit 10, a flag (lens initialization completion information) indicating whether or not the initialization process of the VR lens 223 in the interchangeable lens 200 is completed is set. Bits 11 to 15 are undefined and invalid data areas.

FIG. 14A shows the completion of initialization set in the first adapter communication unit 312 in response to the first camera communication unit 112 sending an initialization execution command to the first adapter communication unit 312 as an initialization request. This is data in an initialization state in response to the confirmation command (data set in step S2130 in FIG. 13). In other words, the first adapter communication unit 312 responds to the initialization completion confirmation command with data shown in FIG. 14A as data indicating that it is in an initialization state indicating “initializing”.
At this timing (step S2130 in FIG. 13), all initialization processes of the focus lens 222 initialization process, the VR lens 223 initialization process, and the aperture interlocking lever 350 initialization process are not completed ( The process of initializing the state of the interchangeable lens 200 has not been completed). However, the first adapter communication unit 312 sets a flag “0” indicating that the initialization process has been completed for each of bits 9 to 10 indicating the initialization state on the interchangeable lens 200 side. On the other hand, a flag “1” indicating that the initialization process has not been completed is set in bit 8 indicating the initialization state data of the aperture interlock lever 350. That is, the adapter 300 always sets the completion flag “0” indicating that the initialization has been completed to bits 9 to 10 regardless of the state of the initialization process on the interchangeable lens 200 side (the progress state of the initialization process). By configuring the initialization flag in the adapter 300 in this way, even when an interchangeable lens of a type that cannot output the initialization completion flag to the adapter 300 is attached to the camera body 100 via the adapter 300, There is an advantage that the types of interchangeable lenses that can be used can be expanded without stopping the operation (camera system) at the stage of the initialization processing sequence described above.

  At the time when the lens initialization process (step S150 in FIG. 13) is completed, the initialization process of the aperture interlock lever 350 on the adapter 300 side has not been completed yet.

FIG. 14B shows data in an initialization state in response to an initialization completion confirmation command set when the initialization process of the initialization driving of the aperture interlock lever 350 (step S2158 in FIG. 13) is completed. At this point (step S2158 in FIG. 13), the lens-side initialization process (step S150 in FIG. 13) is normally completed.
When the initialization process of the aperture interlock lever 350 is completed, the first adapter communication unit 312 sets a flag “0” indicating that the initialization process is completed in bit 8 of the data in the initialization state. As a result, the flag “0” indicating that the initialization process has been completed is set in all the bits 8 to 10 of the data in the initialization state. That is, the first adapter communication unit 312 responds to the initialization completion confirmation command with data shown in FIG. 14B as initialization state data indicating “initialization completion”.

That is, in the initialization completion information indicating whether or not the initialization process has been completed, lens initialization completion information that always indicates whether or not the lens initialization process (the process of initializing the state of the interchangeable lens 200) has been completed. (Bits 9 and 10 in FIG. 14) and information indicating whether or not initialization processing of the aperture interlock lever 350 (aperture interlock lever initialization processing) has been completed (diaphragm interlock lever initialization completion information) (bit 8 in FIG. 14) And are included.
Then, the first adapter communication unit 312 instructs the interchangeable lens 200 to initialize, and at the same time, sets the value of the lens initialization completion information to a value indicating the completion of initialization, and the aperture-linked lever initialization process is completed. Accordingly, the aperture interlock lever initialization completion information value is set to a value indicating completion of initialization.
That is, the adapter control unit 310 sets the value of the lens initialization completion information to a value indicating the completion of initialization regardless of the progress state of the process for initializing the state of the interchangeable lens 200. Further, the adapter controller 310 sets the value of the aperture interlock lever initialization completion information to a value indicating the completion of initialization in response to the completion of the aperture interlock lever initialization process, and the camera controller 110 initially Send complete information.
The adapter control unit 310 responds (transmits) initialization completion information to the camera control unit 110 in accordance with the timing of the initialization completion confirmation command by the camera control unit 110 (detection timing of initialization processing).

As described above, the adapter control unit 310 updates the information (flag) indicating whether or not the initialization is completed at the completion timing of the initialization process of the aperture interlock lever 350 and responds to the camera control unit 110.
Therefore, the adapter control unit 310 displays an initialization completion state indicating that all initialization including initialization on the interchangeable lens 200 side is completed at the timing when the initialization process of the aperture interlock lever 350 is completed. 110 can be responded to.

(Initialization when a standard-compliant lens is attached)
In the above embodiment, the initialization process when the adapter 300 is connected to the camera body 100 has been described. However, the present invention is not limited to this. For example, in an initialization process when an accessory other than the adapter 300 is connected to the camera body 100, whether the accessory has been initialized by the camera body 100 may be detected. For example, in an accessory that is detachably fixed to the camera body 100, the accessory control unit included in the accessory periodically communicates with the camera control unit 110 included in the camera body 100 (steady periodic communication). Is controlled by. In the initialization process in this case, the accessory control unit performs the initialization process according to the control instruction from the camera control unit 110, and whether or not the initialization process is completed is shorter than the periodic communication cycle. Processing detected by the camera control unit 110 may be performed at intervals.
As an example, a case where the accessory that is detachably fixed to the camera body 100 is a standard-compliant lens will be described below.
When a standard-compliant lens (for example, interchangeable lens 200A) is directly connected to the camera body 100 without using the adapter 300, in the lens steady process, for example, the first lens communication unit 212A (the above-described accessory control). The first lens communication unit 212A provided in the lens control unit 210A corresponding to the unit performs steady data communication with the first camera communication unit 112 at a cycle Tm (first adapter communication shown in FIG. 9). The steady data communication is executed at the same cycle Tm as the steady data communication between the unit 312 and the first camera communication unit 112).
Further, in the lens activation process, the first camera communication unit 112 transmits an initialization execution command to the first lens communication unit 212A in the same manner as the initialization request process in step S1140 shown in FIG. That is, the first camera communication unit 112 transmits an initialization execution command to the first lens communication unit 212 </ b> A instead of the first adapter communication unit 312. After that, the first camera communication unit 112 repeatedly transmits an initialization completion confirmation command to the first lens communication unit 212A at the cycle Ts in the same manner as the initialization completion confirmation process in step S1145, and the first camera communication unit 212A receives the initialization completion confirmation command. Wait for a response of "Initialization complete".
Further, when the initialization execution command is received by the first lens communication unit 212A, the lens control unit 210A executes a lens initialization process for the interchangeable lens 200A. Then, in response to the completion of the lens initialization process by the lens control unit 210A, the first lens communication unit 212A responds “initialization complete”.
As described above, the processes from the initialization request to the initialization completion confirmation in the camera control unit 110 are performed when the interchangeable lens 200 is connected to the camera body 100 via the adapter 300 and when the interchangeable lens 200A is directly connected. The same processing is performed in both cases of being connected to the network.
That is, the first lens communication unit 212A performs a process of transmitting information indicating whether or not the initialization process has been completed (a process of responding to the initialization completion confirmation command) at a time interval shorter than the period Tm of steady data communication. It performs with respect to the control part 110. FIG. That is, even when the interchangeable lens 200A is directly connected to the camera body 100, whether or not the initialization process is completed is confirmed by the camera control unit 110 at a time interval shorter than the period Tm of steady data communication. Detected by.
Thereby, the first camera communication unit 112 can detect whether or not the initialization process of the interchangeable lens 200A has been completed at a period of a time interval earlier than the period of the steady data communication. Thereby, the camera control unit 110 can appropriately detect whether or not the initialization process is completed at an early timing.

(Power shutdown processing and low power consumption processing)
Next, power shutdown processing and low power consumption processing will be described.
Here, the low power consumption processing refers to shooting in which the power consumption is reduced in the operation state (operation mode) of the camera body 100 compared to the operation mode (first operation mode) in which shooting processing can be performed. This is a process for switching to an operation mode (second operation mode / low power consumption mode / sleep mode) that cannot be performed.
Here, in the following description, the low power consumption process is referred to as a sleep process, and the operation state (operation mode) changed by the sleep process is referred to as a sleep mode.
For example, in response to an interrupt request due to power-off in the camera body 100, power-off processing is executed. In addition, the sleep process is executed when no operation continues for a predetermined time or more.
The power shutdown process and the sleep process include a lens shutdown process that stops (shuts down) the functions of the adapter 300 and the interchangeable lens 200 and stops (shuts down) the supply of the power system power supply PWR from the camera body 100. It is. That is, the power shutdown process and the sleep process are processes for stopping the voltage supplied to the interchangeable lens 200 and stopping (cutting off) the supply of the voltage of the power system power supply PWR.

  Further, when the operation mode of the camera body 100 is changed to the sleep mode, the supply of the power system power supply PWR from the camera body 100 is stopped, and the supply of the control system power supply Vcc1 is continued. For example, when the operation mode of the camera body 100 transitions to the sleep mode, the camera body 100 continues to supply the voltage of the control system power supply Vcc1 for a predetermined period. Here, the predetermined period is, for example, a period determined to return to the operation mode in which the photographing process can be performed by detecting an operation on the camera body 100, or a no-operation state. This is a period or the like set for shifting to the power-off process of the camera body 100 when the operation is further continued.

In addition, when the operation mode of the camera body 100 transitions to the sleep mode, an instruction signal (shutdown execution command) indicating that the camera is shut off or transition to the sleep mode is sent from the camera control unit 110 to the adapter control unit 310. The adapter control unit 310 receives the instruction signal, and executes a lens shutdown process for stopping the power supply to the interchangeable lens 200.
Next, when the lens shutdown process ends, the adapter control unit 310 transmits to the camera body 100 a permission signal (shutdown preparation completion response) indicating permission to enter the power-off state or the sleep mode. Subsequently, in response to the permission signal transmitted from the adapter control unit 310, the supply of the voltage of the power system power supply PWR from the camera body 100 is stopped.

FIG. 15 is a diagram illustrating an example of a processing sequence of a power shutdown process and a sleep process.
With reference to this figure, the power-off process and the sleep process of the camera system 1 will be described.
The power shutdown process and the sleep process are performed in the order of lens function end (step S410), shutdown (step S420), and sleep mode transition (step S430). In the power shut-off process and the sleep process, communication performed by the camera body 100 with the interchangeable lens 200 via the adapter 300 is command data communication.

When the power cut-off process or the sleep process is started, first, a lens function end process (step S410) is performed.
The first camera communication unit 112 stops the functional operation of the interchangeable lens 200 by communicating with the first lens communication unit 212 via the first adapter communication unit 312 (step S1210, step S2210, step S3210). Thereby, the lens control unit 210 stops the functional operation of the interchangeable lens 200. For example, processing such as termination of anti-vibration control of the interchangeable lens 200 or prohibition of hotline communication is performed by processing for termination of the lens function.

Next, a shutdown (step S420) process is performed.
The first camera communication unit 112 transmits a shutdown execution command to the first adapter communication unit 312 as a shutdown request (step S1220). Thereafter, the first camera communication unit 112 repeatedly transmits a shutdown completion confirmation command, and waits for a response for completion of shutdown preparation from the first adapter communication unit 312.

  When the first adapter communication unit 312 receives a shutdown execution command, the adapter control unit 310 starts lens shutdown processing. First, the first adapter communication unit 312 transmits to the first lens communication unit 212 a command that instructs the lens control system power supply Vc to be unable to supply power. In response to this command being received by the first lens communication unit 212, the lens control unit 210 stops the supply (power supply) of the voltage of the lens control system power supply Vc in the interchangeable lens 200 (step S3220). Next, the first adapter communication unit 312 stops regular lens communication with the first lens communication unit 212. Then, the adapter control unit 310 stops the supply of the lens drive system power supply Vp from the adapter power supply unit 320, and then stops the supply of the lens control system power supply Vc (step S2220).

  Next, the adapter control unit 310 moves the aperture interlocking lever 350 to the retracted position (step S2230), and executes a shutdown process for each unit included in the adapter 300 (step S2235). Subsequently, when the shutdown process is completed, the first adapter communication unit 312 completes the shutdown process in the adapter 300 (the adapter 300 and the interchangeable lens 200) according to the shutdown completion confirmation command received from the first camera communication unit 112. “Shutdown preparation complete” is returned to the first camera communication unit 112 as information indicating that it has been performed. Further, the first adapter communication unit 312 responds to the first camera communication unit 112 with or without a sleep process request (step S2240).

The first camera communication unit 112 acquires a “shutdown preparation complete” response from the first adapter communication unit 312 as a response result of the shutdown completion confirmation command (step S1240).
When the first adapter communication unit 312 receives a response indicating that the shutdown preparation is complete, the camera control unit 110 controls the switch 125 to the cutoff state to stop the supply of the voltage of the power system power supply PWR (step S1250).

  Next, the camera control unit 110 determines whether there is a sleep mode transition request in the response result of the shutdown completion confirmation command (step S1255). If it is determined in step S1255 that there is no sleep mode transition request, the camera control unit 110 controls the camera power supply unit 120 to stop supplying the voltage of the control system power supply Vcc1 (step S1270).

On the other hand, if it is determined in step S1255 that there is a request for shifting to the sleep mode, processing for shifting to the sleep mode (step S430) is performed. First, the first camera communication unit 112 transmits an instruction to transition to the sleep mode to the first adapter communication unit 312. As a result, the adapter control unit 310 transitions to the sleep mode. For example, the first adapter communication unit 312 controls the signal RDY to H (high) level before the start of the process of transitioning to the sleep mode, and after the process of transitioning to the sleep mode is completed, the signal RDY is set to L (low). ) Control to level. The first camera communication unit 112 detects the falling edge of the signal level of the signal RDY to detect that the process of transitioning to the sleep mode of the adapter 300 is completed, and supplies the voltage of the control system power supply Vcc1. Switching to the small power supply state (steps S1260 and S2260).
As a result, a transition is made to the power-off state or the sleep mode.

As described above, when the camera body 100 transitions to the sleep mode, the camera control unit 110 stops the supply of the voltage of the power system power supply PWR to the adapter 300 and continues the supply of the voltage of the control system power supply Vcc1. That is, when the adapter 300 transitions to the sleep mode, the supply of the voltage of the power system power supply PWR from the camera body 100 is stopped, and the supply of the voltage of the control system power supply Vcc1 is continued.
Thereby, power consumption can be reduced in the sleep mode. Further, the supply of the voltage of the control system power supply Vcc1 is continued and the processing of the adapter control unit 310 is not completely stopped (the adapter control unit 310 is operated with the minimum power necessary for the return processing). Therefore, the adapter control unit 310 can return (start up) in a shorter time than when the process is completely stopped when returning (starting up) from the sleep mode to the steady state.

(Processing at the moment of power interruption)
The power system power supply PWR, the lens drive system power supply Vp, and the lens control system power supply Vc each have a predetermined voltage range.
The voltage of the power system power supply PWR, the lens driving system power supply Vp, and the lens control system power supply Vc is detected by the Vc voltage detection unit 325, the Vp voltage detection unit 326, and the PWR voltage detection unit 327, and is detected by the adapter control unit 310. Results are supplied. When the voltage of any one of the detected power system power supply PWR, lens drive system power supply Vp, and lens control system power supply Vc falls below a predetermined voltage range, the adapter control unit 310 The detection result is supplied (notified) to the camera body 100.
For example, the adapter control unit 310 supplies the voltage (voltage value) of the power system power supply PWR supplied from the camera body 100 and the voltage (voltage) of the lens drive system power supply Vp that supplies power to the interchangeable lens 200 from the adapter power supply unit 320. Value), and any voltage (voltage value) of the lens control system power supply Vc that supplies power to the interchangeable lens 200 from the adapter power supply unit 320 is a predetermined voltage range defined for each of them. In the case of lowering, the lens initialization process is executed in order to initialize the interchangeable lens 200 (the state thereof).

  Specifically, an initialization request signal that instructs the camera control unit 110 included in the camera body 100 of the adapter control unit 310 to execute initialization processing including lens initialization processing is sent to the first adapter communication unit. The data is transmitted from 312 to the first camera communication unit 112 and supplied (notified) to the camera body 100. Further, the adapter control unit 310, when any of the detected voltages of the lens drive system power supply Vp and the lens control system power supply Vc falls below a predetermined voltage range, respectively, The supply of the voltages of Vp and the lens control system power supply Vc is stopped, and an initialization request signal is transmitted to the camera body 100.

This initialization process is a process for temporarily stopping the supply of the voltage of the power system power supply PWR in accordance with the initialization request signal and starting the supply again. This initialization process is a process for temporarily stopping the supply of the voltage of the control system power supply Vcc1 in response to the initialization request signal and starting the supply again.
Note that the adapter control unit 310 starts supplying the voltages of the lens driving system power supply Vp and the lens control system power supply Vc in accordance with the initialization process by the camera body 100. That is, the adapter control unit 310 initializes the lens control unit 210 according to the initialization process by the camera body 100.

That is, when the adapter control unit 310 detects a decrease in the power supply voltage, the adapter control unit 310 first stops the supply of voltage to the interchangeable lens 200. Next, the adapter control unit 310 transmits an initialization request signal to the camera control unit 110 to temporarily stop the supply of the power supply voltage supplied from the camera body 100 and then execute the process of starting the supply again. . As a result, when the lens activation process is executed again, the initialization process is performed, and the adapter control unit 310 supplies the interchangeable lens 200 with a voltage.
Therefore, the adapter control unit 310, when any one of the voltages of the power system power supply PWR, the lens drive system power supply Vp, and the lens control system power supply Vc falls below a predetermined voltage range, Initialization of the adapter 300 and the interchangeable lens 200 can be executed. For this reason, it is possible to prevent a problem that the operation on the interchangeable lens 200 side is continued in an unstable power supply state.
In addition, among the voltage values of the power system power supply PWR, the lens drive system power supply Vp, and the lens control system power supply Vc, the judgment may be given superiority (importance or priority). From the viewpoint of maintaining stable power supply, it is highly necessary that the voltage value supplied to supply the supply voltage (power supplied to the adapter power supply unit 320) first falls within a predetermined range. Otherwise, the voltage value generated thereafter may also fluctuate. Therefore, it is determined first whether or not there is an abnormality in the voltage value of the power system power supply PWR. Next, what is important is that the lens control unit 210 needs to be driven stably in order for the interchangeable lens 200 side to perform correct control. For this purpose, a second determination is made as to whether or not there is an abnormality in the lens control system power supply Vc that supplies power to the lens control unit 210. That is, it is only necessary to determine whether or not there is an abnormality in each voltage value with the priorities of the power system power supply PWR, the lens control system power supply Vc, and the lens drive system power supply Vp. By giving superiority to inferiority in this way, for example, even when the voltage value of the lens driving system power supply Vp is abnormal, the voltage value of the lens control system power supply Vc is normal and the lens control unit 210 is normal. Are operating (normally communicating with the adapter control unit 310), the reset lens (initialization process) is not executed on the interchangeable lens 200 side, and other error processing (lens It is also possible to recover by re-driving / retrying the driving element on the side. Thereby, an easy (unnecessary) initialization process can be prevented.

Next, with reference to FIG. 16, as an example of processing when the power supply voltage decreases, processing at the time of instantaneous power interruption will be described.
FIG. 16 is a diagram illustrating an example of a processing sequence at the time of instantaneous power interruption.

  In the lens steady state, the first camera communication unit 112 and the first adapter communication unit 312 perform steady data communication at a cycle Tm (steps S1310, S1312, and S1314). The adapter power supply control unit 311 of the adapter control unit 310 includes a lens control system power supply Vc, a lens drive system power supply Vp, and a power system based on the detection results of the Vc voltage detection unit 325, the Vp voltage detection unit 326, and the PWR voltage detection unit 327. It is detected that the voltage of the power supply PWR is temporarily lowered (step S2310). The example shown in FIG. 16 is an example in the case where the voltage of the lens control system power supply Vc, the lens drive system power supply Vp, and the power system power supply PWR is temporarily reduced and then recovered (when a power supply interruption occurs). is there. The adapter power supply control unit 311 executes a process of shutting off the power to be supplied to the interchangeable lens 200 in response to detecting that the voltage has temporarily decreased (a state where an instantaneous power supply interruption has occurred). . For example, the adapter power supply control unit 311 causes the adapter power supply unit 320 to execute a control for stopping the supply of the voltage in the order of the lens drive system power supply Vp and the lens control system power supply Vc as the power shutoff process (step S2320).

Next, after the adapter power supply unit 320 stops the supply of the voltages of the lens driving system power supply Vp and the lens control system power supply Vc, the first adapter communication unit 312 displays information indicating that a power supply interruption is detected. It responds to the 1st camera communication part 112 by regular data communication (step S1314) (step S2330). For example, the first adapter communication unit 312 transmits a “power supply interruption detected initialization signal” (initialization request signal) to the first camera communication unit 112 as a signal indicating that a power supply interruption has been detected. .
Subsequently, the camera control unit 110 controls the switch 125 to the cutoff state in response to the reception of the “initialization request signal with instantaneous power interruption detection” received by the first camera communication unit 112, so that the power system power supply PWR The supply of voltage is stopped (step S1330). Further, after stopping the supply of the voltage of the power system power supply PWR, the camera control unit 110 controls the camera power supply unit 120 to stop the supply of the voltage of the control system power supply Vcc1 (step S1340).
Subsequently, the camera control unit 110 executes a lens activation process (step S100 in FIG. 8), and again executes a voltage supply process and an initialization process.

  As described above, when an instantaneous interruption of the power supplied to the interchangeable lens 200 occurs, the adapter control unit 310 detects the occurrence of the instantaneous interruption and is supplied from the camera body 100 with a voltage to be supplied to the interchangeable lens. The voltage is temporarily stopped to turn off the power, and then restart is executed to execute the initialization process. As a result, even when a power interruption occurs, the adapter control unit 310 can initialize the adapter 300 and the interchangeable lens 200 to transition to a normal operation state.

In the above embodiment, the adapter power supply control unit 311 determines the lens control system power supply Vc, the lens drive system power supply Vp, and the power system from the detection results of the Vc voltage detection unit 325, the Vp voltage detection unit 326, and the PWR voltage detection unit 327. When it is detected that the voltage of the power supply PWR is temporarily lowered, the power supplied to the interchangeable lens 200 is shut off, and the lens is initialized. However, when only the detection result of the Vp voltage detection unit 326 is determined to be a voltage drop (when the detection results of the Vc voltage detection unit 325 and the PWR voltage detection unit 327 are not determined to be a voltage drop), the adapter control unit 310 and Since the communication with the lens control unit 210 itself is normally executed, the initialization process in the interchangeable lens 200 may not be executed.
In the above embodiment, an example in which the camera control unit 110 initializes the interchangeable lens 200 in response to the detection result of the instantaneous power interruption being transmitted from the adapter control unit 310 to the camera control unit 110 (adapter control). Although the example in which the unit 310 performs initialization while looking for an instruction from the camera control unit 110 has been described, the present invention is not limited to this. For example, the adapter control unit 310 may cause the interchangeable lens 200 to perform initialization without determining an instruction from the camera control unit 110 and determining the necessity of initialization.
In the present embodiment, the configuration including all the three voltage detection units 325 to 327 described above has been described. However, the same effect as that of the present embodiment can be obtained even in a configuration having only one or two of these three voltage detection units. In this case, the PWR voltage detection unit 327 is particularly effective (priority) as a part for performing voltage detection. Hereinafter, the priority order in terms of its effect is the order of the Vc voltage detection unit 325 and the Vp voltage detection unit 326. It is. The effect of this is as described above.

  As described above, according to the present embodiment, various types of optical systems can be appropriately functioned in the interchangeable lens camera system.

The interchangeable lens 200 and the camera body 100 shown in FIGS. 3, 5, and 6 are not limited to the configuration in which only the adapter 300 is connected.
For example, the interchangeable lens 200 and the camera body 100 may be configured to be connected to the interchangeable lens 200 via an adapter 300 and another conversion adapter (such as a teleconverter).
Moreover, although the adapter 300 of the said embodiment is a structure which is not provided with an optical system, it is good also as a structure provided with the optical system.

  Note that the camera control unit 110, the lens control unit 210, or the adapter control unit 310 in FIG. 1 may be realized by dedicated hardware, and is configured by a memory and a CPU (Central Processing Unit). The functions may be realized by loading a program for realizing the functions of the camera control unit 110, the lens control unit 210, and the adapter control unit 310 into the memory and executing them. .

  In addition, a program for realizing the functions of the camera control unit 110, the lens control unit 210, or the adapter control unit 310 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in the computer. The processing of each unit described above may be performed by reading and executing the system. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it also includes those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within a scope not departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 Camera system, 100 Camera body, 110 Camera control part, 200 Interchangeable lens, 210 Lens control part, 220 Optical system, 230 Optical system drive part, 251 Aperture mechanism (aperture), 300 Adapter, 301 1st mount (1st mount) Part), 302 second mount (second mount part), 310 adapter control part, 312 first adapter communication part, 313 second adapter communication part, 320 adapter power supply part, 321 DC-DC converter part, 322 first regulator part 323 Second regulator unit, 325 Vc voltage detection unit, 326 Vp voltage detection unit, 327 PWR voltage detection unit, 330 aperture interlock lever drive unit, 350 aperture interlock lever

Claims (9)

A first mount part to which the camera body can be attached and detached;
A second mount part that is provided separately from the first mount part and to which the interchangeable lens can be attached and detached;
A camera in the camera body mounted on the first mount unit that performs first periodic communication with a lens control unit in the interchangeable lens mounted on the second mount unit in a first communication cycle. An adapter control unit that executes the second regular communication with the control unit in the second communication cycle,
The adapter controller is
In the first periodic communication, communication is performed a plurality of times with the lens control unit, the first information is acquired from the lens control unit every time, and the plurality of the first information acquired through the plurality of communication is performed. An adapter that generates second information to be transmitted to the camera control unit by the second regular communication using a plurality of the first information acquired at different times among the information. The adapter controller is
The adapter according to claim 1, wherein the second information is transmitted to the camera control unit in response to a request from the camera control unit. The adapter controller is
3. The adapter according to claim 1, wherein the second information is generated by combining the plurality of first information acquired by dividing the plurality of times into one. 4. The adapter controller is
The adapter according to any one of claims 1 to 3, wherein the second information is generated from a plurality of the first information based on a predetermined format. The adapter controller is
The adapter according to any one of claims 1 to 4, wherein the first periodic communication and the second periodic communication are performed in an asynchronous relationship. The adapter controller is
The adapter according to claim 5, wherein the second information is generated according to a communication timing of the first regular communication. The adapter controller is
The adapter according to claim 5, wherein the second information is generated according to a communication timing of the second regular communication. The adapter according to any one of claims 1 to 7, and
The camera body attached to the first mount;
The interchangeable lens mounted on the second mount part;
A camera system comprising: Controls the operation of an adapter control unit provided in an adapter that is provided separately from the first mount unit to which the camera body can be attached and detached and the second mount unit from which the interchangeable lens can be attached and detached. An adapter control program,
A first step of performing a first periodic communication with a lens control unit in the interchangeable lens mounted on the second mount unit at a first communication cycle;
A second step of executing a second regular communication with a camera control unit in the camera body mounted on the first mount unit in a second communication cycle;
A third step of performing a plurality of communications with the lens control unit in the first regular communication and obtaining first information from the lens control unit each time;
Of the plurality of first information acquired by the plurality of times of communication in the third step, the plurality of first information acquired at different times is used to transmit to the camera control unit by the second periodical communication. An adapter control program comprising: a fourth step of generating second information.

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