FR2346733B1 - - Google Patents

Info

Publication number
FR2346733B1
FR2346733B1 FR7518957A FR7518957A FR2346733B1 FR 2346733 B1 FR2346733 B1 FR 2346733B1 FR 7518957 A FR7518957 A FR 7518957A FR 7518957 A FR7518957 A FR 7518957A FR 2346733 B1 FR2346733 B1 FR 2346733B1
Authority
FR
France
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
FR7518957A
Other versions
FR2346733A1 (fr
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of FR2346733A1 publication Critical patent/FR2346733A1/fr
Application granted granted Critical
Publication of FR2346733B1 publication Critical patent/FR2346733B1/fr
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
    • G02B15/22—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
FR7518957A 1974-06-18 1975-06-17 Procede et appareil pour augmenter le champ d'un objectif photographique Granted FR2346733A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49069399A JPS588481B2 (ja) 1974-06-18 1974-06-18 ズ−ムレンズの広角化方式

Publications (2)

Publication Number Publication Date
FR2346733A1 FR2346733A1 (fr) 1977-10-28
FR2346733B1 true FR2346733B1 (fr) 1978-09-01

Family

ID=13401474

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7518957A Granted FR2346733A1 (fr) 1974-06-18 1975-06-17 Procede et appareil pour augmenter le champ d'un objectif photographique

Country Status (4)

Country Link
US (1) US4518227A (fr)
JP (1) JPS588481B2 (fr)
DE (1) DE2527105C2 (fr)
FR (1) FR2346733A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2660536C2 (de) * 1975-08-06 1982-09-02 Bolex International S.A., Sainte-Croix, Vaud Negatives Vorsatzglied für ein abbildendes optisches System
JPS5833527B2 (ja) * 1978-01-30 1983-07-20 富士写真フイルム株式会社 超広角コンバ−タ−に変換可能なズ−ムアフォ−カルレンズ
CH632345A5 (fr) * 1979-08-14 1982-09-30 Eric Campiche Dispositif optique afocal.
DE3150077C2 (de) * 1981-12-17 1985-03-14 Elmo Co. Ltd., Nagoya, Aichi Varioobjektiv
JPH0531782U (ja) * 1991-10-02 1993-04-27 シヤープ株式会社 水槽の懸架構造
JP3346622B2 (ja) * 1992-10-15 2002-11-18 オリンパス光学工業株式会社 ズームレンズ
US6222681B1 (en) 1996-08-30 2001-04-24 Minolta, Co., Ltd. Zoom lens system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1169731A (en) * 1915-08-04 1916-01-25 Zeiss Carl Fa Lens for placing before a photographic objective.
DE1897655U (de) * 1964-05-29 1964-07-30 Zeiss Carl Fa Photographisches objektiv veraenderbarer brennweite.
DE1962694U (de) * 1967-04-06 1967-06-22 Guenter Friebe Bildwinkel-vorsatz fuer projektoren und kameras.
JPS5023814B1 (fr) * 1970-07-25 1975-08-11
JPS4920221B1 (fr) * 1970-09-30 1974-05-23
US3748022A (en) * 1971-03-11 1973-07-24 Canon Kk Reverse telephoto type lens prevented from the deterioration of image at the time of close shot
FR2137598B1 (fr) * 1971-05-08 1975-03-21 Canon Kk
JPH0115843B2 (fr) * 1972-09-22 1989-03-20 Canon Kk
US3848968A (en) * 1972-12-26 1974-11-19 Polaroid Corp Compact eight element zoom lens with optical compensation

Also Published As

Publication number Publication date
DE2527105C2 (de) 1982-04-08
DE2527105A1 (de) 1976-02-12
JPS50161229A (fr) 1975-12-27
FR2346733A1 (fr) 1977-10-28
JPS588481B2 (ja) 1983-02-16
US4518227A (en) 1985-05-21

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