JPS57132121A - Camera system - Google Patents

Camera system

Info

Publication number
JPS57132121A
JPS57132121A JP20890181A JP20890181A JPS57132121A JP S57132121 A JPS57132121 A JP S57132121A JP 20890181 A JP20890181 A JP 20890181A JP 20890181 A JP20890181 A JP 20890181A JP S57132121 A JPS57132121 A JP S57132121A
Authority
JP
Japan
Prior art keywords
gate
photometry
circuit
end signal
output
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
JP20890181A
Other languages
Japanese (ja)
Inventor
Yukio Mashita
Fumio Ito
Tadashi Ito
Masanori Uchitoi
Masayoshi Yamamichi
Tokuichi Tsunekawa
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 JP20890181A priority Critical patent/JPS57132121A/en
Publication of JPS57132121A publication Critical patent/JPS57132121A/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
    • G03B7/091—Digital circuits

Landscapes

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

Abstract

PURPOSE:To ensure the accurate measurement of light even though a subject is dark, by securing an automatic start of the internal mechanism of a camera when the luminance of the subject is detected through a photographic lens and the result of this detection is held. CONSTITUTION:The clock pulse which is applied to a gate G16 is consecutively supplied to a gate circuit GL0 until the output of the circuit GL0, i.e., the photometry end signal is applied to the gate G16 via an inverter 17'. At the same time, an inverted output is supplied to the circuit GL0 from a comparator C2. The photometry end signal given from the circuit GL0 is applied to a gate 17 via a monostable multivibrator M2 which functions as a delaying circuit. The contents of a counter CC2 are reset by the output of the gate 17 to start the next photometry. Thus the photometry is consecutively carried out. When both the photometry end signal and the photometry stop signal are applied to the gate G15, the contents of the counter CC2 are preserved. Then an electromanet forming an electromagnetic releasing mechanism is controlled to start the internal mechanism of a camera.
JP20890181A 1981-12-23 1981-12-23 Camera system Pending JPS57132121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20890181A JPS57132121A (en) 1981-12-23 1981-12-23 Camera system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20890181A JPS57132121A (en) 1981-12-23 1981-12-23 Camera system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49147842A Division JPS5173439A (en) 1974-10-07 1974-12-23

Publications (1)

Publication Number Publication Date
JPS57132121A true JPS57132121A (en) 1982-08-16

Family

ID=16563998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20890181A Pending JPS57132121A (en) 1981-12-23 1981-12-23 Camera system

Country Status (1)

Country Link
JP (1) JPS57132121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4875699B2 (en) * 2006-04-11 2012-02-15 パナソニック株式会社 Air conditioner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110337A (en) * 1973-02-20 1974-10-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110337A (en) * 1973-02-20 1974-10-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4875699B2 (en) * 2006-04-11 2012-02-15 パナソニック株式会社 Air conditioner

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