JPS56117220A - Photometric device of single-lens reflex camera - Google Patents

Photometric device of single-lens reflex camera

Info

Publication number
JPS56117220A
JPS56117220A JP2064380A JP2064380A JPS56117220A JP S56117220 A JPS56117220 A JP S56117220A JP 2064380 A JP2064380 A JP 2064380A JP 2064380 A JP2064380 A JP 2064380A JP S56117220 A JPS56117220 A JP S56117220A
Authority
JP
Japan
Prior art keywords
photographing
photodetector
exposure
observation
exposure control
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.)
Pending
Application number
JP2064380A
Other languages
Japanese (ja)
Inventor
Hiroshi Hasegawa
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP2064380A priority Critical patent/JPS56117220A/en
Priority to US06/215,345 priority patent/US4359275A/en
Priority to GB8040664A priority patent/GB2067773A/en
Priority to DE19803048136 priority patent/DE3048136A1/en
Priority to FR8027083A priority patent/FR2472202A1/fr
Publication of JPS56117220A publication Critical patent/JPS56117220A/en
Pending 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
    • G03B7/099—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
    • G03B7/09972—Through the lens [TTL] measuring in mirror-reflex cameras using the mirror as sensor light reflecting or transmitting member

Abstract

PURPOSE:To reduce a trouble of adjustment and the cost by equalizing exposure information before photographing to an exposure control value in photographing, by equalizing the quantity of photodetection of a photodetector for exposure control in photographing to that in observation. CONSTITUTION:In observation, light from an object passes through photographic lens 3 and the 1st mirror 5 and is reflected by the 2nd mirror 6 to strike photodetector 2. In photographing, the light passed through photographic lens 3 is reflected by film 8 or shutter blind 7 with a reflection coefficient close to that of the film to strike photodetector 2. So that the quantity of photodetection of photodetector 2 in observation will be equal to that in photographing, transmission factors and reflection factors of photometric mirrors 5 and 6 are fixed. Consequently, exposure information before photographing becomes equal to an exposure control value in photographing and because only one photodetector 2 is in use, the trouble and cost are reduced. In addition, the exposure is determined by previously flashing the speed light device.
JP2064380A 1979-12-21 1980-02-22 Photometric device of single-lens reflex camera Pending JPS56117220A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2064380A JPS56117220A (en) 1980-02-22 1980-02-22 Photometric device of single-lens reflex camera
US06/215,345 US4359275A (en) 1979-12-21 1980-12-11 Single lens reflex camera system capable of TTL flash output control
GB8040664A GB2067773A (en) 1979-12-21 1980-12-18 Single lens reflex camera system capable of ttl flash output control
DE19803048136 DE3048136A1 (en) 1979-12-21 1980-12-19 CAMERA SYSTEM WITH TTL CONTROL OF THE FLASH LIGHT
FR8027083A FR2472202A1 (en) 1979-12-21 1980-12-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2064380A JPS56117220A (en) 1980-02-22 1980-02-22 Photometric device of single-lens reflex camera

Publications (1)

Publication Number Publication Date
JPS56117220A true JPS56117220A (en) 1981-09-14

Family

ID=12032899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2064380A Pending JPS56117220A (en) 1979-12-21 1980-02-22 Photometric device of single-lens reflex camera

Country Status (1)

Country Link
JP (1) JPS56117220A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5398821A (en) * 1977-02-09 1978-08-29 Leitz Ernst Gmbh Photographic camera having device for measuring exposure through photographic lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5398821A (en) * 1977-02-09 1978-08-29 Leitz Ernst Gmbh Photographic camera having device for measuring exposure through photographic lens

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