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JPS57164710A - Compact and high variable magnification zoom lens - Google Patents

Compact and high variable magnification zoom lens

Info

Publication number
JPS57164710A
JPS57164710A JP56049347A JP4934781A JPS57164710A JP S57164710 A JPS57164710 A JP S57164710A JP 56049347 A JP56049347 A JP 56049347A JP 4934781 A JP4934781 A JP 4934781A JP S57164710 A JPS57164710 A JP S57164710A
Authority
JP
Japan
Prior art keywords
lens
lens elements
positive
negative
compact
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.)
Granted
Application number
JP56049347A
Other languages
Japanese (ja)
Other versions
JPS6237365B2 (en
Inventor
Shozo Ishiyama
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56049347A priority Critical patent/JPS57164710A/en
Priority to US06/364,257 priority patent/US4498741A/en
Publication of JPS57164710A publication Critical patent/JPS57164710A/en
Publication of JPS6237365B2 publication Critical patent/JPS6237365B2/ja
Granted 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
    • G02B15/143—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
    • G02B15/1431—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 positive
    • G02B15/143105—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 positive arranged +-+

Landscapes

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

Abstract

PURPOSE:To obtain a zoom lens of large zoom ratios having compact and simple lens frame construction by satisfying prescribed conditions in a lens system consisting of positive, negative, positive, negative and positive five lens elements successively from the object side. CONSTITUTION:In a lens system consisting of positive, negative, positive, negative and positive five lens elements successively from the object side, (1) in the entire area of zooming the partial system of the 1st and 2nd lens elements has a negative combined focal length, and the partial system consisting of the 3rd-5th lens elements has a positive combined focal length; (2) the 1st and 3rd lens elements are moved as one body, and (3) to zoom the lens from the wide angle end to the telephoto end, the respective lens elements move in such a way that the space between the 1st and 2nd lens elements and the space between the 3rd and 4th lens elements increase and the space between the 2nd and 3rd lens elements and the space between the 4th and 5th lens elements decrease. When these conditions are satisfied, the zoom lens of large zoom ratios having the compact and simple lens frame construction is obtained.
JP56049347A 1981-04-03 1981-04-03 Compact and high variable magnification zoom lens Granted JPS57164710A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56049347A JPS57164710A (en) 1981-04-03 1981-04-03 Compact and high variable magnification zoom lens
US06/364,257 US4498741A (en) 1981-04-03 1982-04-01 Compact, wide magnification-variable zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56049347A JPS57164710A (en) 1981-04-03 1981-04-03 Compact and high variable magnification zoom lens

Publications (2)

Publication Number Publication Date
JPS57164710A true JPS57164710A (en) 1982-10-09
JPS6237365B2 JPS6237365B2 (en) 1987-08-12

Family

ID=12828472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56049347A Granted JPS57164710A (en) 1981-04-03 1981-04-03 Compact and high variable magnification zoom lens

Country Status (1)

Country Link
JP (1) JPS57164710A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039613A (en) * 1983-08-12 1985-03-01 Minolta Camera Co Ltd Zoom lens system of high variable magnification including wide angle range
US5189557A (en) * 1990-11-20 1993-02-23 Canon Kabushiki Kaisha High variable magnification range zoom lens
US5956184A (en) * 1996-09-04 1999-09-21 Nikon Corporation Zoom lens system having high zoom ratio

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039613A (en) * 1983-08-12 1985-03-01 Minolta Camera Co Ltd Zoom lens system of high variable magnification including wide angle range
JPH0544645B2 (en) * 1983-08-12 1993-07-07 Minolta Camera Kk
US5189557A (en) * 1990-11-20 1993-02-23 Canon Kabushiki Kaisha High variable magnification range zoom lens
US5956184A (en) * 1996-09-04 1999-09-21 Nikon Corporation Zoom lens system having high zoom ratio

Also Published As

Publication number Publication date
JPS6237365B2 (en) 1987-08-12

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