GB9204886D0 - Exposure control apparatus in single lens reflex camera - Google Patents

Exposure control apparatus in single lens reflex camera

Info

Publication number
GB9204886D0
GB9204886D0 GB929204886A GB9204886A GB9204886D0 GB 9204886 D0 GB9204886 D0 GB 9204886D0 GB 929204886 A GB929204886 A GB 929204886A GB 9204886 A GB9204886 A GB 9204886A GB 9204886 D0 GB9204886 D0 GB 9204886D0
Authority
GB
United Kingdom
Prior art keywords
control apparatus
exposure control
single lens
lens reflex
reflex camera
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.)
Withdrawn
Application number
GB929204886A
Other versions
GB2253491A (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 GB9204886D0 publication Critical patent/GB9204886D0/en
Publication of GB2253491A publication Critical patent/GB2253491A/en
Withdrawn legal-status Critical Current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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/24—Focusing screens
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09976—Through the lens [TTL] measuring in mirror-reflex cameras the sensor being mounted in, before, or behind the porro-prism
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09979—Multi-zone light measuring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)
  • Exposure Control For Cameras (AREA)
  • Cameras In General (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB9204886A 1991-03-07 1992-03-05 Exposure control apparatus in single lens reflex camera Withdrawn GB2253491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3125673A JP3045808B2 (en) 1991-03-07 1991-03-07 Exposure control device for single-lens reflex camera

Publications (2)

Publication Number Publication Date
GB9204886D0 true GB9204886D0 (en) 1992-04-22
GB2253491A GB2253491A (en) 1992-09-09

Family

ID=14915831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9204886A Withdrawn GB2253491A (en) 1991-03-07 1992-03-05 Exposure control apparatus in single lens reflex camera

Country Status (4)

Country Link
JP (1) JP3045808B2 (en)
DE (1) DE4207135A1 (en)
FR (1) FR2673732A1 (en)
GB (1) GB2253491A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642221A (en) * 1979-09-14 1981-04-20 Konishiroku Photo Ind Co Ltd Liquid crystal focal plate
JPS63241531A (en) * 1987-03-30 1988-10-06 Canon Inc Finder of camera
US4977424A (en) * 1987-10-14 1990-12-11 Minolta Camera Kabushiki Kaisha Light measuring device for camera

Also Published As

Publication number Publication date
JPH04280240A (en) 1992-10-06
FR2673732A1 (en) 1992-09-11
JP3045808B2 (en) 2000-05-29
GB2253491A (en) 1992-09-09
DE4207135A1 (en) 1992-09-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)