GB1498976A - Camera viewfinder including an information indicating device - Google Patents

Camera viewfinder including an information indicating device

Info

Publication number
GB1498976A
GB1498976A GB22120/75A GB2212075A GB1498976A GB 1498976 A GB1498976 A GB 1498976A GB 22120/75 A GB22120/75 A GB 22120/75A GB 2212075 A GB2212075 A GB 2212075A GB 1498976 A GB1498976 A GB 1498976A
Authority
GB
United Kingdom
Prior art keywords
pentaprism
face
prism
camera viewfinder
information indicating
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
GB22120/75A
Other languages
English (en)
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 GB1498976A publication Critical patent/GB1498976A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Optical Elements Other Than Lenses (AREA)
GB22120/75A 1974-05-30 1975-05-22 Camera viewfinder including an information indicating device Expired GB1498976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6111174A JPS547461B2 (enExample) 1974-05-30 1974-05-30

Publications (1)

Publication Number Publication Date
GB1498976A true GB1498976A (en) 1978-01-25

Family

ID=13161630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22120/75A Expired GB1498976A (en) 1974-05-30 1975-05-22 Camera viewfinder including an information indicating device

Country Status (5)

Country Link
US (1) US4021830A (enExample)
JP (1) JPS547461B2 (enExample)
FR (1) FR2280100A1 (enExample)
GB (1) GB1498976A (enExample)
ZA (1) ZA753092B (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52143937U (enExample) * 1976-04-27 1977-10-31
US4251146A (en) * 1979-01-29 1981-02-17 Polaroid Corporation Photographic apparatus for providing a signal visible in a camera viewfinder
JPS55105239A (en) * 1979-02-07 1980-08-12 Canon Inc Finder of single-lens reflex camera
JP3676524B2 (ja) * 1996-10-25 2005-07-27 ペンタックス株式会社 プリズム
US7046925B2 (en) 2003-01-17 2006-05-16 Pentax Corporation Superimpose-plate for view finder
JP3920781B2 (ja) 2003-01-17 2007-05-30 ペンタックス株式会社 ファインダの投光装置
US6941069B2 (en) * 2003-01-17 2005-09-06 Pentax Corporation Light-projecting device
JP2004219908A (ja) * 2003-01-17 2004-08-05 Pentax Corp ファインダの投光装置
US7225548B2 (en) * 2004-05-17 2007-06-05 Sr2 Group, Llc System and method for aligning multiple sighting devices

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128684A (en) * 1959-12-28 1964-04-14 Kamera & Kinowerke Dresden Veb Camera data device
DE1214080B (de) * 1961-11-11 1966-04-07 Zeiss Ikon Ag Spiegelreflexsucher mit Penta-Dachkantprisma
US3657985A (en) * 1969-12-03 1972-04-25 Asahi Optical Co Ltd Single lens reflex camera
US3757656A (en) * 1970-11-17 1973-09-11 Minolta Camera Kk Single lens reflex camera
JPS524926Y2 (enExample) * 1971-12-20 1977-02-01
US3840298A (en) * 1972-02-07 1974-10-08 Canon Kk Mirror reflex viewfinder providing indications of photographing information
JPS48113936U (enExample) * 1972-04-05 1973-12-26

Also Published As

Publication number Publication date
DE2523680A1 (de) 1975-12-11
JPS50153634A (enExample) 1975-12-10
ZA753092B (en) 1976-04-28
FR2280100A1 (fr) 1976-02-20
FR2280100B1 (enExample) 1977-12-02
DE2523680B2 (de) 1977-06-08
JPS547461B2 (enExample) 1979-04-06
US4021830A (en) 1977-05-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee