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JPS56116022A - Aperture controller of camera - Google Patents

Aperture controller of camera

Info

Publication number
JPS56116022A
JPS56116022A JP1918380A JP1918380A JPS56116022A JP S56116022 A JPS56116022 A JP S56116022A JP 1918380 A JP1918380 A JP 1918380A JP 1918380 A JP1918380 A JP 1918380A JP S56116022 A JPS56116022 A JP S56116022A
Authority
JP
Japan
Prior art keywords
aperture
preset
counter
value
driver
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
JP1918380A
Other languages
Japanese (ja)
Inventor
Minoru Kawada
Koji Tanaka
Kazuhiro Okada
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.)
Mamiya OP Co Ltd
Original Assignee
Mamiya Camera Co Ltd
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 Mamiya Camera Co Ltd filed Critical Mamiya Camera Co Ltd
Priority to JP1918380A priority Critical patent/JPS56116022A/en
Publication of JPS56116022A publication Critical patent/JPS56116022A/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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • G03B9/07—Diaphragms with means for presetting the diaphragm

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cameras In General (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

PURPOSE:To operate an aperture remotely by driving aperture blades through the reciprocal vibration of an electromagnetic driver, by supplying the driver with a pulse signal corresponding to a preset aperture value. CONSTITUTION:An aperture value is preset in preset counter 22 by aperture setter 21. When switch 4 is turned on with the release button, counter 22 starts operation with a signal from operation timing circuit 24 and generates an output of ''1'' and a pulse input is supplied from oscillator 23 for subtraction counting operation. Then, when the substraction value becomes zero, ''0'' is outputted. Therefore, counter 22 outputs ''1'' only for the time that corresponds to the preset value and during the period, AND gate 25 is opened to drive electromagnetic driver 9. Next, blade feed pawl 10 is made to reciprocate as many times as the number of pulses and ratchet wheel 6a is driven to rotate aperture operation ring 6, stopping down aperture blades 8. Thus, the aperture is operated remotely.
JP1918380A 1980-02-20 1980-02-20 Aperture controller of camera Pending JPS56116022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1918380A JPS56116022A (en) 1980-02-20 1980-02-20 Aperture controller of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1918380A JPS56116022A (en) 1980-02-20 1980-02-20 Aperture controller of camera

Publications (1)

Publication Number Publication Date
JPS56116022A true JPS56116022A (en) 1981-09-11

Family

ID=11992216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1918380A Pending JPS56116022A (en) 1980-02-20 1980-02-20 Aperture controller of camera

Country Status (1)

Country Link
JP (1) JPS56116022A (en)

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