JPS57172330A - Automatic dimming system using focusing detector - Google Patents

Automatic dimming system using focusing detector

Info

Publication number
JPS57172330A
JPS57172330A JP56058174A JP5817481A JPS57172330A JP S57172330 A JPS57172330 A JP S57172330A JP 56058174 A JP56058174 A JP 56058174A JP 5817481 A JP5817481 A JP 5817481A JP S57172330 A JPS57172330 A JP S57172330A
Authority
JP
Japan
Prior art keywords
unit
automatic dimming
light
focusing
detection
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
JP56058174A
Other languages
Japanese (ja)
Inventor
Mitsuya Hosoe
Takao Kinoshita
Masayoshi Yamamichi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56058174A priority Critical patent/JPS57172330A/en
Priority to US06/368,433 priority patent/US4429966A/en
Priority to DE19823214063 priority patent/DE3214063A1/en
Publication of JPS57172330A publication Critical patent/JPS57172330A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

PURPOSE:To perform automatic dimming, by leading a part of the luminous flux, which comes from an object during the exposure of a film, onto a photoelectric converter of a focusing detector and stopping the operation of an illuminating means when a proper exposure is obtained. CONSTITUTION:For example, a single-lens reflex camera main body 25 is provided with a photodetecting unit 31, and the unit 31 receives the incident luminous flux of a lens 24 through a quick return mirror 27a and is used for detection of the focusing state. Further, the unit 31 is constituted so as to receive the reflection light from a film 34 through a small mirror 39 at an exposure time. When the automatic dimming mode is set and a flash 40 emits the light, an electric charge corresponding to the quantity of light emission is integrated in a signal processing circuit 32 in respect to the detection light of the unit 31; and when it reaches a predetermined voltage, light emission of the flash 40 is stopped. Thus, the photodetecting unit for focusing detection is switched and used to perform the automatic dimming for a proper exposure.
JP56058174A 1981-04-16 1981-04-17 Automatic dimming system using focusing detector Pending JPS57172330A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56058174A JPS57172330A (en) 1981-04-17 1981-04-17 Automatic dimming system using focusing detector
US06/368,433 US4429966A (en) 1981-04-16 1982-04-14 Camera with photoelectric focus detecting device
DE19823214063 DE3214063A1 (en) 1981-04-16 1982-04-16 CAMERA WITH A PHOTOELECTRIC FOCUS DETECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058174A JPS57172330A (en) 1981-04-17 1981-04-17 Automatic dimming system using focusing detector

Publications (1)

Publication Number Publication Date
JPS57172330A true JPS57172330A (en) 1982-10-23

Family

ID=13076629

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058174A Pending JPS57172330A (en) 1981-04-16 1981-04-17 Automatic dimming system using focusing detector

Country Status (1)

Country Link
JP (1) JPS57172330A (en)

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