FR2373804A1 - Objectif zoom pour appareils de prise de vues - Google Patents

Objectif zoom pour appareils de prise de vues

Info

Publication number
FR2373804A1
FR2373804A1 FR7736830A FR7736830A FR2373804A1 FR 2373804 A1 FR2373804 A1 FR 2373804A1 FR 7736830 A FR7736830 A FR 7736830A FR 7736830 A FR7736830 A FR 7736830A FR 2373804 A1 FR2373804 A1 FR 2373804A1
Authority
FR
France
Prior art keywords
focal length
zoom lens
image sharpness
relative distance
lens groups
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
FR7736830A
Other languages
English (en)
French (fr)
Other versions
FR2373804B1 (OSRAM
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical Co Ltd
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
Priority claimed from JP15795676A external-priority patent/JPS5382371A/ja
Application filed by Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Publication of FR2373804A1 publication Critical patent/FR2373804A1/fr
Application granted granted Critical
Publication of FR2373804B1 publication Critical patent/FR2373804B1/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
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Lenses (AREA)
FR7736830A 1976-12-09 1977-12-07 Objectif zoom pour appareils de prise de vues Granted FR2373804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16511476 1976-12-09
JP15795676A JPS5382371A (en) 1976-12-28 1976-12-28 Zoom lens barrel permitting close distance photographing

Publications (2)

Publication Number Publication Date
FR2373804A1 true FR2373804A1 (fr) 1978-07-07
FR2373804B1 FR2373804B1 (OSRAM) 1982-08-06

Family

ID=26485229

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7736830A Granted FR2373804A1 (fr) 1976-12-09 1977-12-07 Objectif zoom pour appareils de prise de vues

Country Status (2)

Country Link
DE (2) DE2754713C3 (OSRAM)
FR (1) FR2373804A1 (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637989A1 (fr) * 1988-10-15 1990-04-20 Asahi Optical Co Ltd Ensemble d'objectif zoom pour appareil photographique et procede de commande de l'ensemble d'objectif zoom
US5233472A (en) * 1988-10-15 1993-08-03 Asahi Kogaku Kogyo Kabushiki Kaisha Method of controlling a zoom lens assembly
US5434714A (en) * 1989-03-31 1995-07-18 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57116309A (en) * 1981-01-12 1982-07-20 Canon Inc Zoom lens barrel
JPS58145902A (ja) * 1982-02-25 1983-08-31 Yabe Kogaku Kiki Seisakusho:Kk マクロ機能付リアコンバ−タレンズ
JPH07119872B2 (ja) * 1985-12-02 1995-12-20 旭光学工業株式会社 ズ−ムレンズ鏡筒
DE3730572C2 (de) * 1987-09-11 1996-08-22 Leica Industrieverwaltung Fotografisches Objektiv

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141204A1 (de) * 1970-08-18 1972-02-24 Nippon Kogaku K.K., Tokio Varioobjektiv für Kamera
US3752565A (en) * 1972-02-18 1973-08-14 Shima Kogaku Kk Zoom lens apparatus
FR2193986A1 (OSRAM) * 1971-11-10 1974-02-22 Mito Hiroshi
US3841735A (en) * 1972-07-17 1974-10-15 Sanko Kogaku Kogyo Kk Zoom lens system operable for extremely short distance photography
US3915557A (en) * 1974-04-19 1975-10-28 Optigon Res & Dev Corp Zoom lens
US4002402A (en) * 1974-02-27 1977-01-11 Hiroshi Mito Lens hood for zoom lenses
FR2331043A1 (fr) * 1975-12-19 1977-06-03 Nippon Kogaku Kk Monture d'objectif a distance focale variable permettant la macrophotographie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059533A (en) * 1959-11-23 1962-10-23 Bell & Howell Co Zoom lens
DE1812964U (de) * 1960-02-12 1960-06-09 Zeiss Carl Fa Einstellfassung fuer photographische objektive mit entfernungs- und brennweitenverstellung.
US3784285A (en) * 1972-06-01 1974-01-08 Ponder & Best Zoom lens
US3765748A (en) * 1972-09-01 1973-10-16 H Mito Mechanism for relative adjustment of axially spaced lens components

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141204A1 (de) * 1970-08-18 1972-02-24 Nippon Kogaku K.K., Tokio Varioobjektiv für Kamera
FR2193986A1 (OSRAM) * 1971-11-10 1974-02-22 Mito Hiroshi
US3752565A (en) * 1972-02-18 1973-08-14 Shima Kogaku Kk Zoom lens apparatus
US3841735A (en) * 1972-07-17 1974-10-15 Sanko Kogaku Kogyo Kk Zoom lens system operable for extremely short distance photography
US4002402A (en) * 1974-02-27 1977-01-11 Hiroshi Mito Lens hood for zoom lenses
US3915557A (en) * 1974-04-19 1975-10-28 Optigon Res & Dev Corp Zoom lens
FR2331043A1 (fr) * 1975-12-19 1977-06-03 Nippon Kogaku Kk Monture d'objectif a distance focale variable permettant la macrophotographie

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637989A1 (fr) * 1988-10-15 1990-04-20 Asahi Optical Co Ltd Ensemble d'objectif zoom pour appareil photographique et procede de commande de l'ensemble d'objectif zoom
US5170294A (en) * 1988-10-15 1992-12-08 Asahi Kogaku Kabushiki Kaisha Method of controlling the zoom lens assembly
US5233472A (en) * 1988-10-15 1993-08-03 Asahi Kogaku Kogyo Kabushiki Kaisha Method of controlling a zoom lens assembly
US5434714A (en) * 1989-03-31 1995-07-18 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel
US5450242A (en) * 1989-03-31 1995-09-12 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel
US5636063A (en) * 1989-03-31 1997-06-03 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel
US5646790A (en) * 1989-03-31 1997-07-08 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel

Also Published As

Publication number Publication date
DE2754713B2 (de) 1979-03-08
DE2754713A1 (de) 1978-06-22
FR2373804B1 (OSRAM) 1982-08-06
DE7737467U1 (de) 1979-02-08
DE2754713C3 (de) 1982-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse