FR2641621B1 - Systeme optique destine a etre utilise avec un viseur d'appareil photographique reflex a un seul objectif - Google Patents

Systeme optique destine a etre utilise avec un viseur d'appareil photographique reflex a un seul objectif

Info

Publication number
FR2641621B1
FR2641621B1 FR9000180A FR9000180A FR2641621B1 FR 2641621 B1 FR2641621 B1 FR 2641621B1 FR 9000180 A FR9000180 A FR 9000180A FR 9000180 A FR9000180 A FR 9000180A FR 2641621 B1 FR2641621 B1 FR 2641621B1
Authority
FR
France
Prior art keywords
optical system
lens reflex
reflex camera
camera sight
sight
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 - Fee Related
Application number
FR9000180A
Other languages
English (en)
French (fr)
Other versions
FR2641621A1 (fr
Inventor
Saburo Sugawara
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2641621A1 publication Critical patent/FR2641621A1/fr
Application granted granted Critical
Publication of FR2641621B1 publication Critical patent/FR2641621B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Viewfinders (AREA)
FR9000180A 1989-01-09 1990-01-09 Systeme optique destine a etre utilise avec un viseur d'appareil photographique reflex a un seul objectif Expired - Fee Related FR2641621B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1002331A JPH0758368B2 (ja) 1989-01-09 1989-01-09 ペンタミラーを用いた一眼レフカメラのファインダー光学系

Publications (2)

Publication Number Publication Date
FR2641621A1 FR2641621A1 (fr) 1990-07-13
FR2641621B1 true FR2641621B1 (fr) 1993-04-23

Family

ID=11526331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9000180A Expired - Fee Related FR2641621B1 (fr) 1989-01-09 1990-01-09 Systeme optique destine a etre utilise avec un viseur d'appareil photographique reflex a un seul objectif

Country Status (4)

Country Link
JP (1) JPH0758368B2 (de)
DE (1) DE4000448C2 (de)
FR (1) FR2641621B1 (de)
GB (1) GB2227104B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3072157B2 (ja) * 1991-09-10 2000-07-31 旭光学工業株式会社 変倍ファインダー
GB2261744B (en) * 1991-11-25 1996-07-03 Asahi Optical Co Ltd Variable power view finder with aspheric lens surfaces
GB2282459B (en) * 1991-11-25 1996-07-03 Asahi Optical Co Ltd Optical system having a biaspheric lens and an aspheric lens
JP4439608B2 (ja) * 1997-12-24 2010-03-24 キヤノン株式会社 ファインダ光学系
JP6447124B2 (ja) * 2014-12-26 2019-01-09 株式会社ニコン 接眼レンズ、光学装置、及び接眼レンズの製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983342A (en) * 1962-12-19 1965-02-17 Ednalite Corp Improvements in or relating to lens systems
GB1269529A (en) * 1968-06-04 1972-04-06 Ricoh Kk Improvements in and relating to viewfinder systems
DE1800365B2 (de) * 1968-10-01 1976-09-16 Ausscheidung in: 18 17 991 KJC. Ricoh, Tokio Einaeugige spiegelreflexkamera
GB1483116A (en) * 1974-10-29 1977-08-17 Rank Organisation Ltd Optical objectives
GB1500495A (en) * 1975-04-04 1978-02-08 Harwood G Photographic lens
JPS6048013B2 (ja) * 1978-03-09 1985-10-24 キヤノン株式会社 フアインダ−光学系
JPS5529833A (en) * 1978-08-22 1980-03-03 Minolta Camera Co Ltd Finder for single-lens reflex camera
JPH0241613Y2 (de) * 1979-02-01 1990-11-06
JPS5754931A (en) * 1980-09-19 1982-04-01 Nippon Kogaku Kk <Nikon> View finder for single-lens reflex camera

Also Published As

Publication number Publication date
GB9000066D0 (en) 1990-03-07
GB2227104B (en) 1993-03-31
JPH02181713A (ja) 1990-07-16
JPH0758368B2 (ja) 1995-06-21
GB2227104A (en) 1990-07-18
DE4000448A1 (de) 1990-07-12
DE4000448C2 (de) 1993-12-02
FR2641621A1 (fr) 1990-07-13

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Legal Events

Date Code Title Description
ST Notification of lapse