JPS58107521A - Flash photographing device - Google Patents

Flash photographing device

Info

Publication number
JPS58107521A
JPS58107521A JP56207685A JP20768581A JPS58107521A JP S58107521 A JPS58107521 A JP S58107521A JP 56207685 A JP56207685 A JP 56207685A JP 20768581 A JP20768581 A JP 20768581A JP S58107521 A JPS58107521 A JP S58107521A
Authority
JP
Japan
Prior art keywords
flash
photography
output
outside
range
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
JP56207685A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kataoka
Masanori Yamada
Nobuyuki Suzuki
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 JP56207685A priority Critical patent/JPS58107521A/en
Priority claimed from US06/444,214 external-priority patent/US4501481A/en
Publication of JPS58107521A publication Critical patent/JPS58107521A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2215/00Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05Combinations of cameras with electronic flash units

Abstract

PURPOSE:To enable the flash photography with proper exposure value, by controlling the switching of shooting modes after detecting that an object to be photographed (object) is outside a range of flash photography. CONSTITUTION:The output of a comparator of a photometric circuit is not inverted and kept at a low level in case an object is outside a range of flash photograhpy in response to the distance, brightness, etc. of the object. Then a warning display is given via an LED, etc. after detecting that the object is outside the range of falsh photography. At the same time, a transistor at the side of a flash light emitting device is turned off. As a result, a terminal (a) is released from its earth state and no current flows to a flash device from the camera side. Thus the output of an operational amplifier AR9 is set at the same level as the voltage of a constant voltage source 301. Therefore the output of a comparator CP5 is not inerted and kept at a low level, and a switch 302 is not switched to secure a natural light photography mode not a flash light photography mode. In such a way, the flash photography is always possible with proper exposure value.
JP56207685A 1981-12-21 1981-12-21 Flash photographing device Pending JPS58107521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56207685A JPS58107521A (en) 1981-12-21 1981-12-21 Flash photographing device

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP56207685A JPS58107521A (en) 1981-12-21 1981-12-21 Flash photographing device
US06/444,214 US4501481A (en) 1981-12-04 1982-11-24 Flash photographing system
DE3244650A DE3244650C2 (en) 1981-12-04 1982-12-02 Flash photography system
US06/723,331 US4615599A (en) 1981-12-04 1985-04-15 Flash photographing system
US06/734,757 US4569580A (en) 1981-12-04 1985-05-15 Flash photographing system

Publications (1)

Publication Number Publication Date
JPS58107521A true JPS58107521A (en) 1983-06-27

Family

ID=16543875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56207685A Pending JPS58107521A (en) 1981-12-21 1981-12-21 Flash photographing device

Country Status (1)

Country Link
JP (1) JPS58107521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6193437A (en) * 1985-04-05 1986-05-12 Minolta Camera Co Ltd Exposure corrector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6193437A (en) * 1985-04-05 1986-05-12 Minolta Camera Co Ltd Exposure corrector

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