JPS5543508A - Composite type digital electric shutter which automates shutter starting - Google Patents

Composite type digital electric shutter which automates shutter starting

Info

Publication number
JPS5543508A
JPS5543508A JP11510478A JP11510478A JPS5543508A JP S5543508 A JPS5543508 A JP S5543508A JP 11510478 A JP11510478 A JP 11510478A JP 11510478 A JP11510478 A JP 11510478A JP S5543508 A JPS5543508 A JP S5543508A
Authority
JP
Japan
Prior art keywords
shutter
photo response
restoring device
speed fixing
time
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
JP11510478A
Other languages
Japanese (ja)
Inventor
Tsukumo Nobusawa
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP11510478A priority Critical patent/JPS5543508A/en
Publication of JPS5543508A publication Critical patent/JPS5543508A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To let starting of the shutter to be automatically accomplished when iris is regulated to a correct value by providing a photo response shutter time restoring device and a low speed fixing and high speed fixing shutter time restoring device.
CONSTITUTION: When the camera is directed to the subject and a switch is closed, a photo response timer 1 emits the signal of the time length corresponding to the intehsity of photographing light, during which time the reference pulses being outputted from a reference pulse generator 2 are counted and stored in a photo response pulse counter 3. A photo response shutter time restoring device M outputs the shutter close signal when the number of the reference pulses being applied through shutter release assumes a fixed relation with the storage value in the photo response pulse counter 3. When the photographic light is of low luminance, a low speed fixing shutter time restoring time L is operated after the correction of the iris corresponding to its inadequateness and when it is of high luminance, a high speed fixing shutter time restoring device H is operated after the correction of the iris corresponding to its inadequateness.
COPYRIGHT: (C)1980,JPO&Japio
JP11510478A 1978-09-21 1978-09-21 Composite type digital electric shutter which automates shutter starting Pending JPS5543508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11510478A JPS5543508A (en) 1978-09-21 1978-09-21 Composite type digital electric shutter which automates shutter starting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11510478A JPS5543508A (en) 1978-09-21 1978-09-21 Composite type digital electric shutter which automates shutter starting

Publications (1)

Publication Number Publication Date
JPS5543508A true JPS5543508A (en) 1980-03-27

Family

ID=14654316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11510478A Pending JPS5543508A (en) 1978-09-21 1978-09-21 Composite type digital electric shutter which automates shutter starting

Country Status (1)

Country Link
JP (1) JPS5543508A (en)

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