JPS5532082A - Exposure control device for camera - Google Patents

Exposure control device for camera

Info

Publication number
JPS5532082A
JPS5532082A JP10580578A JP10580578A JPS5532082A JP S5532082 A JPS5532082 A JP S5532082A JP 10580578 A JP10580578 A JP 10580578A JP 10580578 A JP10580578 A JP 10580578A JP S5532082 A JPS5532082 A JP S5532082A
Authority
JP
Japan
Prior art keywords
control device
output
time measuring
exposure control
photometry
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
JP10580578A
Other languages
Japanese (ja)
Inventor
Ryoichi Suzuki
Tetsuya Taguchi
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 JP10580578A priority Critical patent/JPS5532082A/en
Publication of JPS5532082A publication Critical patent/JPS5532082A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To obtain appropriate time measuring start signal without chattering phenomenon, by controlling the start of operation of time constant circuit of the exposure control device with the output of photo detector for photometry.
CONSTITUTION: A photoelectric element 31 is provided in a position capable of detecting the transmitted light from the main aperture or sub-aperture of the shutter, and a transistor TR7 to constitute the time measuring circuit for measuring the output of the photoelectric element 31, a switching transistor TR6 for time measuring start, etc. are provided to control the exposure with the output signal from the time measuring means. Since the start of operation of the time constant circuit of the exposure control device is controlled by the output of the photo detector 31 for photometry, and mechanical switches are not used, the start of count can be controlled securely and safely without encountering problem of chattering.
COPYRIGHT: (C)1980,JPO&Japio
JP10580578A 1978-08-30 1978-08-30 Exposure control device for camera Pending JPS5532082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10580578A JPS5532082A (en) 1978-08-30 1978-08-30 Exposure control device for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10580578A JPS5532082A (en) 1978-08-30 1978-08-30 Exposure control device for camera

Publications (1)

Publication Number Publication Date
JPS5532082A true JPS5532082A (en) 1980-03-06

Family

ID=14417318

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10580578A Pending JPS5532082A (en) 1978-08-30 1978-08-30 Exposure control device for camera

Country Status (1)

Country Link
JP (1) JPS5532082A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI401527B (en) * 2009-07-29 2013-07-11 Altek Corp Personalized safety shutter value setting method and recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI401527B (en) * 2009-07-29 2013-07-11 Altek Corp Personalized safety shutter value setting method and recording medium

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