JPS5753735A - Mode switching device of camera - Google Patents

Mode switching device of camera

Info

Publication number
JPS5753735A
JPS5753735A JP55128238A JP12823880A JPS5753735A JP S5753735 A JPS5753735 A JP S5753735A JP 55128238 A JP55128238 A JP 55128238A JP 12823880 A JP12823880 A JP 12823880A JP S5753735 A JPS5753735 A JP S5753735A
Authority
JP
Japan
Prior art keywords
shutter
speed
output
capacitor
turns
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
JP55128238A
Other languages
Japanese (ja)
Inventor
Nobuyuki Suzuki
Masami Shimizu
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 JP55128238A priority Critical patent/JPS5753735A/en
Priority to US06/301,535 priority patent/US4428655A/en
Publication of JPS5753735A publication Critical patent/JPS5753735A/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
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time

Abstract

PURPOSE:To eliminate the need for a mechanical switch by performing the auto/ manual mode switching of shutter second speeds by discriminating the level of a setting signal which corresponds to the setting of a shutter-speed setting member. CONSTITUTION:When a shutter dial is set at the position of auto mode, the potential of the variable terminal 3a of a variable resistance 3 for speed information is maximized and the output of a voltage comparator 8 goes up to a high level. Consequently, a switching circuit 27 turns on and on the basis of brightness information obtained by a photodetecting element 13 and another photographic information, a shutter speed is calculated and then stored in a capacitor 29 for storage. When manual mode is set, on the other hand, the output of the comparator 8 goes down to a low level and a switching circuit 26 turns on, thereby storing the capacitor 29 for storage with the set-speed corresponding output of an operational amplifier 10 which corresponds to the resistance value of the variable resistance 3.
JP55128238A 1980-09-16 1980-09-16 Mode switching device of camera Pending JPS5753735A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55128238A JPS5753735A (en) 1980-09-16 1980-09-16 Mode switching device of camera
US06/301,535 US4428655A (en) 1980-09-16 1981-09-14 Mode selector device for a camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55128238A JPS5753735A (en) 1980-09-16 1980-09-16 Mode switching device of camera

Publications (1)

Publication Number Publication Date
JPS5753735A true JPS5753735A (en) 1982-03-30

Family

ID=14979901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55128238A Pending JPS5753735A (en) 1980-09-16 1980-09-16 Mode switching device of camera

Country Status (1)

Country Link
JP (1) JPS5753735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133460U (en) * 1983-02-24 1984-09-06 大日本印刷株式会社 container

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298525A (en) * 1976-02-13 1977-08-18 Yashica Co Ltd Digital shutter circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298525A (en) * 1976-02-13 1977-08-18 Yashica Co Ltd Digital shutter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133460U (en) * 1983-02-24 1984-09-06 大日本印刷株式会社 container

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