JPS5023814B1 - - Google Patents

Info

Publication number
JPS5023814B1
JPS5023814B1 JP45064707A JP6470770A JPS5023814B1 JP S5023814 B1 JPS5023814 B1 JP S5023814B1 JP 45064707 A JP45064707 A JP 45064707A JP 6470770 A JP6470770 A JP 6470770A JP S5023814 B1 JPS5023814 B1 JP S5023814B1
Authority
JP
Japan
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
JP45064707A
Other languages
Japanese (ja)
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
Priority to JP45064707A priority Critical patent/JPS5023814B1/ja
Priority to GB3406771A priority patent/GB1303620A/en
Priority to US00165169A priority patent/US3784284A/en
Priority to DE19712137033 priority patent/DE2137033B2/de
Publication of JPS5023814B1 publication Critical patent/JPS5023814B1/ja
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
    • G02B15/22—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 movable lens means specially adapted for focusing at close distances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)
  • Viewfinders (AREA)
JP45064707A 1970-07-25 1970-07-25 Pending JPS5023814B1 ( )

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP45064707A JPS5023814B1 ( ) 1970-07-25 1970-07-25
GB3406771A GB1303620A ( ) 1970-07-25 1971-07-20
US00165169A US3784284A (en) 1970-07-25 1971-07-22 Zoom lens system for close up photography
DE19712137033 DE2137033B2 (de) 1970-07-25 1971-07-23 Linsensystem mit veraenderbarer brennweite und extremer naheinstellung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45064707A JPS5023814B1 ( ) 1970-07-25 1970-07-25

Publications (1)

Publication Number Publication Date
JPS5023814B1 true JPS5023814B1 ( ) 1975-08-11

Family

ID=13265872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP45064707A Pending JPS5023814B1 ( ) 1970-07-25 1970-07-25

Country Status (4)

Country Link
US (1) US3784284A ( )
JP (1) JPS5023814B1 ( )
DE (1) DE2137033B2 ( )
GB (1) GB1303620A ( )

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342370B2 ( ) * 1973-07-02 1978-11-10
JPS5712967B2 ( ) * 1973-12-07 1982-03-13
JPS50125755A ( ) * 1974-03-19 1975-10-03
JPS588481B2 (ja) * 1974-06-18 1983-02-16 キヤノン株式会社 ズ−ムレンズの広角化方式
JPS6034732B2 (ja) * 1975-11-05 1985-08-10 キヤノン株式会社 至近距離の短いズームレンズ
JPS6018043B2 (ja) * 1975-11-18 1985-05-08 キヤノン株式会社 ズームレンズの望遠化方法
JPS52145051A (en) * 1976-05-27 1977-12-02 Minolta Camera Co Ltd Zoom lens system permitting extra-close-up photographing
US4307943A (en) * 1978-09-11 1981-12-29 Vivitar Corporation Close focusing zoom lens
FR2459988A1 (fr) * 1979-06-26 1981-01-16 Angenieux P Ets Dispositif d'objectif a focale variable
US5268790A (en) * 1991-12-20 1993-12-07 Hughes Aircraft Company Zoom lens employing refractive and diffractive optical elements
GB9226806D0 (en) * 1991-12-25 1993-02-17 Asahi Optical Co Ltd Zoom lens system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120271A (fr) * 1955-01-24 1956-07-03 Objectif à longueur focale variable
CH381878A (fr) * 1962-11-15 1964-09-15 Paillard Sa Objectif à focale variable
US3507555A (en) * 1967-04-03 1970-04-21 Nippon Kogaku Kk Zoom lens optical system
US3584935A (en) * 1968-06-03 1971-06-15 Konishiroku Photo Ind Improved wide angle zoom objective lens system
JPS4841903B1 ( ) * 1969-07-12 1973-12-10
JPS4832387B1 ( ) * 1969-07-26 1973-10-05

Also Published As

Publication number Publication date
DE2137033B2 (de) 1973-03-15
US3784284A (en) 1974-01-08
DE2137033A1 (de) 1972-02-17
GB1303620A ( ) 1973-01-17
DE2137033C3 ( ) 1973-10-11

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