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JPS5719710A - Zoom lens system capable of macrofocusing - Google Patents

Zoom lens system capable of macrofocusing

Info

Publication number
JPS5719710A
JPS5719710A JP9426080A JP9426080A JPS5719710A JP S5719710 A JPS5719710 A JP S5719710A JP 9426080 A JP9426080 A JP 9426080A JP 9426080 A JP9426080 A JP 9426080A JP S5719710 A JPS5719710 A JP S5719710A
Authority
JP
Japan
Prior art keywords
group
macrofocusing
extending
positive
moves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9426080A
Other languages
Japanese (ja)
Inventor
Mitsuaki Horimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP9426080A priority Critical patent/JPS5719710A/en
Priority to US06/254,409 priority patent/US4465343A/en
Publication of JPS5719710A publication Critical patent/JPS5719710A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
    • G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
    • G02B15/143507—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -++
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/105—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens with movable lens means specially adapted for focusing at close distances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To make possible macrophotography of reduced shortest object distance, large mgnifications and good aberration performance by dividing the rear group of a two element lens to two positive refracting power groups, and performing macrofocusing by extending the 3rd group. CONSTITUTION:This system has the negative 1st group (I), the positive 2nd group (II), and the positive 3rd group (III) from the object size. In zooming, the lens group relatively moves like (A)-(B)-(C) in such a way that the air space between the 1st and 2nd groups widens on the telephoto side. In focusing, the 1st group (I) moves to the object side like (C)-(D) and the 3rd group (III) moves to the object side like (D)-(E) from the state on the long focal length side, thereby making macrofocusing possible. In an embodiment, the macro state of 0.5m (D) object distance is realized by extending the 1st group 3.22mm. and that of 0.25m (E) object distance by extending the 3rd group 13.05mm., with EFL=24-50, and F value 4.
JP9426080A 1980-05-10 1980-07-09 Zoom lens system capable of macrofocusing Pending JPS5719710A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9426080A JPS5719710A (en) 1980-07-09 1980-07-09 Zoom lens system capable of macrofocusing
US06/254,409 US4465343A (en) 1980-05-10 1981-04-15 Zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9426080A JPS5719710A (en) 1980-07-09 1980-07-09 Zoom lens system capable of macrofocusing

Publications (1)

Publication Number Publication Date
JPS5719710A true JPS5719710A (en) 1982-02-02

Family

ID=14105306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9426080A Pending JPS5719710A (en) 1980-05-10 1980-07-09 Zoom lens system capable of macrofocusing

Country Status (1)

Country Link
JP (1) JPS5719710A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592235U (en) * 1982-06-30 1984-01-09 中川　盛雄 Drawer handle fixture
JPS5952214A (en) * 1982-09-18 1984-03-26 Tamuron:Kk Focusing method of zoom lens
JPS5973705U (en) * 1982-11-09 1984-05-18 キヤノン株式会社 Camera with close focus mechanism
JPS602662A (en) * 1983-06-21 1985-01-08 Agency Of Ind Science & Technol Formation of ceramics coated layer
US5909318A (en) * 1997-04-18 1999-06-01 Fuji Photo Optical Co., Ltd. Three-group zoom lens
JP2007155887A (en) * 2005-12-01 2007-06-21 Fujinon Corp Objective for endoscope
CN108604001A (en) * 2016-02-24 2018-09-28 松下知识产权经营株式会社 Zoom-lens system, the photographic device with zoom-lens system and the vehicle with photographic device
WO2022172821A1 (en) * 2021-02-12 2022-08-18 株式会社ニコン Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592235U (en) * 1982-06-30 1984-01-09 中川　盛雄 Drawer handle fixture
JPS5952214A (en) * 1982-09-18 1984-03-26 Tamuron:Kk Focusing method of zoom lens
JPS5973705U (en) * 1982-11-09 1984-05-18 キヤノン株式会社 Camera with close focus mechanism
JPH019937Y2 (en) * 1982-11-09 1989-03-20
JPS602662A (en) * 1983-06-21 1985-01-08 Agency Of Ind Science & Technol Formation of ceramics coated layer
US5909318A (en) * 1997-04-18 1999-06-01 Fuji Photo Optical Co., Ltd. Three-group zoom lens
JP2007155887A (en) * 2005-12-01 2007-06-21 Fujinon Corp Objective for endoscope
CN108604001A (en) * 2016-02-24 2018-09-28 松下知识产权经营株式会社 Zoom-lens system, the photographic device with zoom-lens system and the vehicle with photographic device
WO2022172821A1 (en) * 2021-02-12 2022-08-18 株式会社ニコン Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system

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