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JPS57154205A - Compact zoom lens of high variable magnification - Google Patents

Compact zoom lens of high variable magnification

Info

Publication number
JPS57154205A
JPS57154205A JP56037915A JP3791581A JPS57154205A JP S57154205 A JPS57154205 A JP S57154205A JP 56037915 A JP56037915 A JP 56037915A JP 3791581 A JP3791581 A JP 3791581A JP S57154205 A JPS57154205 A JP S57154205A
Authority
JP
Japan
Prior art keywords
positive
lens
lens components
negative
space
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
JP56037915A
Other languages
Japanese (ja)
Other versions
JPS6151291B2 (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 JP56037915A priority Critical patent/JPS57154205A/en
Publication of JPS57154205A publication Critical patent/JPS57154205A/en
Publication of JPS6151291B2 publication Critical patent/JPS6151291B2/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
    • G02B15/145—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 five groups only
    • G02B15/1451—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 five groups only the first group being positive
    • G02B15/145121—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 five 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 which has a compact and simple body frame structure, and a large zoom ratio, by satisfying the prescribed conditions, in a lens system consisting of lens components of positive, negative, positive, negative and positive in order from the side of an object. CONSTITUTION:In a lens system consisting of 5 lens components having power of positive, negative, positive, negative and positive, in order from the side of an object, it is constituted so that the partial system of the first and second lens components has a negative composite focus, the partial system of the third through fifth lens components has a positive composite focal distance, and when the first, third and fifth lens components move in one body and zoom to the telephoto end from the wide angle end, the space between the first and second lens components and the space between the third and fourth lens components are increased, and the space between the second and third lens components and the space between the fourth and fifth lens components are decreased. In this way, it is possible to obtain a zoom lens which has a compact and simple body frame structure, and a large zoom ratio.
JP56037915A 1981-03-18 1981-03-18 Compact zoom lens of high variable magnification Granted JPS57154205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56037915A JPS57154205A (en) 1981-03-18 1981-03-18 Compact zoom lens of high variable magnification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56037915A JPS57154205A (en) 1981-03-18 1981-03-18 Compact zoom lens of high variable magnification

Publications (2)

Publication Number Publication Date
JPS57154205A true JPS57154205A (en) 1982-09-24
JPS6151291B2 JPS6151291B2 (en) 1986-11-08

Family

ID=12510834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56037915A Granted JPS57154205A (en) 1981-03-18 1981-03-18 Compact zoom lens of high variable magnification

Country Status (1)

Country Link
JP (1) JPS57154205A (en)

Cited By (2)

* 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
US5956184A (en) * 1996-09-04 1999-09-21 Nikon Corporation Zoom lens system having high zoom ratio

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
JPH0544645B2 (en) * 1983-08-12 1993-07-07 Minolta Camera Kk
US5956184A (en) * 1996-09-04 1999-09-21 Nikon Corporation Zoom lens system having high zoom ratio

Also Published As

Publication number Publication date
JPS6151291B2 (en) 1986-11-08

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