JPS552260A - Automatic digital exposure control unit of both shutter and aperture control - Google Patents

Automatic digital exposure control unit of both shutter and aperture control

Info

Publication number
JPS552260A
JPS552260A JP7496078A JP7496078A JPS552260A JP S552260 A JPS552260 A JP S552260A JP 7496078 A JP7496078 A JP 7496078A JP 7496078 A JP7496078 A JP 7496078A JP S552260 A JPS552260 A JP S552260A
Authority
JP
Japan
Prior art keywords
aperture
shutter
shutter time
light
control unit
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
JP7496078A
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 JP7496078A priority Critical patent/JPS552260A/en
Publication of JPS552260A publication Critical patent/JPS552260A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE: To widen the range where shutter time and aperture value may be used by automatically setting the aperture in correspondence to field high then determining the shutter time corresponding pulse based on the field light having passed through the aperture.
CONSTITUTION: A light response pulse generator 1 receives the field light incident through aperture 2 and outputs the light response pulses of the same wave number corresponding to its intensity. An aperture value signal forming circuit 18 receives the light response pulses for the time having been set in a timer 12 and forms an aperture value signal, so that the aperture is automatically set by an aperture driving device 32. A shutter time corresponding pulse signal forming circuit 34 forms the shutter time corresponding pulse signal based on the field light having passed through the aperture 2, restores the shutter time based on this pulse after shutter release and emits the shutter close signal.
COPYRIGHT: (C)1980,JPO&Japio
JP7496078A 1978-06-21 1978-06-21 Automatic digital exposure control unit of both shutter and aperture control Pending JPS552260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7496078A JPS552260A (en) 1978-06-21 1978-06-21 Automatic digital exposure control unit of both shutter and aperture control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7496078A JPS552260A (en) 1978-06-21 1978-06-21 Automatic digital exposure control unit of both shutter and aperture control

Publications (1)

Publication Number Publication Date
JPS552260A true JPS552260A (en) 1980-01-09

Family

ID=13562381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7496078A Pending JPS552260A (en) 1978-06-21 1978-06-21 Automatic digital exposure control unit of both shutter and aperture control

Country Status (1)

Country Link
JP (1) JPS552260A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398813A (en) * 1980-09-29 1983-08-16 Agfa-Gevaert Ag Photographic camera
JPS6064328A (en) * 1983-09-20 1985-04-12 Nippon Kogaku Kk <Nikon> Exposure controller of camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398813A (en) * 1980-09-29 1983-08-16 Agfa-Gevaert Ag Photographic camera
JPS6064328A (en) * 1983-09-20 1985-04-12 Nippon Kogaku Kk <Nikon> Exposure controller of camera

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