CA1013988A - Electronic shutter device for a single lens reflex camera - Google Patents

Electronic shutter device for a single lens reflex camera

Info

Publication number
CA1013988A
CA1013988A CA208,127A CA208127A CA1013988A CA 1013988 A CA1013988 A CA 1013988A CA 208127 A CA208127 A CA 208127A CA 1013988 A CA1013988 A CA 1013988A
Authority
CA
Canada
Prior art keywords
single lens
shutter device
electronic shutter
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.)
Expired
Application number
CA208,127A
Other versions
CA208127S (en
Inventor
Akira Takahashi
Mikio Kobayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 JP9672373A external-priority patent/JPS5321647B2/ja
Priority claimed from JP48096724A external-priority patent/JPS5135854B2/ja
Priority claimed from JP48114739A external-priority patent/JPS5067137A/ja
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of CA1013988A publication Critical patent/CA1013988A/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
    • 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
    • G03B7/081—Analogue circuits
    • G03B7/089—Analogue circuits for storage of exposure value in mirror reflex cameras
    • 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
    • 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
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time
    • 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
    • G03B7/091—Digital circuits
    • G03B7/093—Digital circuits for control of exposure time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)
CA208,127A 1973-08-30 1974-08-29 Electronic shutter device for a single lens reflex camera Expired CA1013988A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9672373A JPS5321647B2 (en) 1973-08-30 1973-08-30
JP48096724A JPS5135854B2 (en) 1973-08-30 1973-08-30
JP48114739A JPS5067137A (en) 1973-10-15 1973-10-15
JP194874 1973-12-27

Publications (1)

Publication Number Publication Date
CA1013988A true CA1013988A (en) 1977-07-19

Family

ID=27453514

Family Applications (1)

Application Number Title Priority Date Filing Date
CA208,127A Expired CA1013988A (en) 1973-08-30 1974-08-29 Electronic shutter device for a single lens reflex camera

Country Status (3)

Country Link
CA (1) CA1013988A (en)
DE (4) DE2462589A1 (en)
IT (1) IT1020312B (en)

Also Published As

Publication number Publication date
DE2462589A1 (en) 1977-10-13
DE2462512B1 (en) 1979-06-21
DE2462512C2 (en) 1980-02-21
DE2441620B2 (en) 1977-07-07
DE2441620A1 (en) 1975-03-27
DE2462587A1 (en) 1977-10-13
DE2462219A1 (en) 1976-09-23
IT1020312B (en) 1977-12-20

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