GB1304470A - - Google Patents

Info

Publication number
GB1304470A
GB1304470A GB1804371A GB1804371A GB1304470A GB 1304470 A GB1304470 A GB 1304470A GB 1804371 A GB1804371 A GB 1804371A GB 1804371 A GB1804371 A GB 1804371A GB 1304470 A GB1304470 A GB 1304470A
Authority
GB
United Kingdom
Prior art keywords
focal length
positive
negative
iii
lens
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.)
Expired
Application number
GB1804371A
Other languages
English (en)
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 filed Critical
Publication of GB1304470A publication Critical patent/GB1304470A/en
Expired 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
    • G02B15/145125—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)
  • Viewfinders (AREA)
GB1804371A 1970-07-01 1971-05-28 Expired GB1304470A (US07696358-20100413-C00002.png)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702032573 DE2032573A1 (de) 1970-07-01 1970-07-01 Lichtstarkes Objektiv mit veränderbarer Brennweite

Publications (1)

Publication Number Publication Date
GB1304470A true GB1304470A (US07696358-20100413-C00002.png) 1973-01-24

Family

ID=5775495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1804371A Expired GB1304470A (US07696358-20100413-C00002.png) 1970-07-01 1971-05-28

Country Status (5)

Country Link
US (1) US3707324A (US07696358-20100413-C00002.png)
AT (1) AT309099B (US07696358-20100413-C00002.png)
DE (1) DE2032573A1 (US07696358-20100413-C00002.png)
FR (1) FR2097093B3 (US07696358-20100413-C00002.png)
GB (1) GB1304470A (US07696358-20100413-C00002.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316500A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2350829A1 (de) * 1973-10-10 1975-04-24 Schneider Co Optische Werke Lichtstarkes vario-objektiv
JPS5832686B2 (ja) * 1976-04-20 1983-07-14 オリンパス光学工業株式会社 高変倍ズ−ムレンズ
JPH0642018B2 (ja) * 1984-10-11 1994-06-01 キヤノン株式会社 ズ−ムレンズ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264094B (de) * 1963-10-16 1968-03-21 Schneider Co Optische Werke Lichtstarkes Vario-Objektiv
DE1497590C3 (de) * 1966-04-05 1974-10-17 Jos. Schneider & Co, Optische Werke, 6550 Bad Kreuznach Lichtstarkes Objektiv mit veränderbarer Brennweite
DE1647001A1 (de) * 1968-01-05 1971-01-14 Schneider Co Optische Werke Lichtstarkes Objektiv mit veraenderbarer Brennweite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316500A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio
US5815322A (en) * 1996-08-12 1998-09-29 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens system having high zoom ratio
GB2316500B (en) * 1996-08-12 2000-10-11 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio

Also Published As

Publication number Publication date
US3707324A (en) 1972-12-26
FR2097093A3 (US07696358-20100413-C00002.png) 1972-03-03
FR2097093B3 (US07696358-20100413-C00002.png) 1974-03-08
DE2032573A1 (de) 1972-01-05
AT309099B (de) 1973-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees