JPH0447775B2 - - Google Patents

Info

Publication number
JPH0447775B2
JPH0447775B2 JP58195617A JP19561783A JPH0447775B2 JP H0447775 B2 JPH0447775 B2 JP H0447775B2 JP 58195617 A JP58195617 A JP 58195617A JP 19561783 A JP19561783 A JP 19561783A JP H0447775 B2 JPH0447775 B2 JP H0447775B2
Authority
JP
Japan
Prior art keywords
circuit
output
capacitor
voltage
light
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 - Lifetime
Application number
JP58195617A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6088329A (ja
Inventor
Tadashi Okino
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 JP58195617A priority Critical patent/JPS6088329A/ja
Publication of JPS6088329A publication Critical patent/JPS6088329A/ja
Priority to US06/894,384 priority patent/US4711546A/en
Publication of JPH0447775B2 publication Critical patent/JPH0447775B2/ja
Granted 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
    • G03B7/083—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
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)
JP58195617A 1983-10-19 1983-10-19 測光回路 Granted JPS6088329A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP58195617A JPS6088329A (ja) 1983-10-19 1983-10-19 測光回路
US06/894,384 US4711546A (en) 1983-10-19 1986-08-07 Photometric circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58195617A JPS6088329A (ja) 1983-10-19 1983-10-19 測光回路

Publications (2)

Publication Number Publication Date
JPS6088329A JPS6088329A (ja) 1985-05-18
JPH0447775B2 true JPH0447775B2 (enExample) 1992-08-04

Family

ID=16344143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58195617A Granted JPS6088329A (ja) 1983-10-19 1983-10-19 測光回路

Country Status (1)

Country Link
JP (1) JPS6088329A (enExample)

Also Published As

Publication number Publication date
JPS6088329A (ja) 1985-05-18

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