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JPS5538551A - Memory hold device of automatic exposure control type camera - Google Patents

Memory hold device of automatic exposure control type camera

Info

Publication number
JPS5538551A
JPS5538551A JP11177778A JP11177778A JPS5538551A JP S5538551 A JPS5538551 A JP S5538551A JP 11177778 A JP11177778 A JP 11177778A JP 11177778 A JP11177778 A JP 11177778A JP S5538551 A JPS5538551 A JP S5538551A
Authority
JP
Japan
Prior art keywords
memory
capacitor
exposure control
control type
automatic exposure
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.)
Granted
Application number
JP11177778A
Other languages
Japanese (ja)
Other versions
JPS6231333B2 (en
Inventor
Ryuzo Mototsugu
Yoshiaki Otsubo
Sakuji Watanabe
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP11177778A priority Critical patent/JPS5538551A/en
Priority to US06/074,919 priority patent/US4264164A/en
Priority to DE19792937145 priority patent/DE2937145A1/en
Publication of JPS5538551A publication Critical patent/JPS5538551A/en
Publication of JPS6231333B2 publication Critical patent/JPS6231333B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE: To prevent voltage drop due to current leakage of memory capacitor and decrease exposure control error, by providing a means to block supply of capacitor terminal voltage to display circuit in response to memory action between the capacitor and display circuit.
CONSTITUTION: A mirror is elevated when a release button of a camera is depressed. Since a memory control switch 9 is turned on just before the mirror is elevated, an analog switch 4 is set in OFF state, so that a memory capacitor 5 stores the operational output just before the analog switch 4 becomes OFF. An exposure control circuit 8 controls the exposure depending on the operational output stored in the memory capacitor 5. At this time, the memory capacitor 5 is electrically insulated from operational circuit 3 and meter 7 by means of analog switches 4, 6, so that drop of charged voltage may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP11177778A 1978-09-13 1978-09-13 Memory hold device of automatic exposure control type camera Granted JPS5538551A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11177778A JPS5538551A (en) 1978-09-13 1978-09-13 Memory hold device of automatic exposure control type camera
US06/074,919 US4264164A (en) 1978-09-13 1979-09-13 Memory holding device in a single lens reflex camera
DE19792937145 DE2937145A1 (en) 1978-09-13 1979-09-13 One-eyed mirror reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11177778A JPS5538551A (en) 1978-09-13 1978-09-13 Memory hold device of automatic exposure control type camera

Publications (2)

Publication Number Publication Date
JPS5538551A true JPS5538551A (en) 1980-03-18
JPS6231333B2 JPS6231333B2 (en) 1987-07-08

Family

ID=14569895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11177778A Granted JPS5538551A (en) 1978-09-13 1978-09-13 Memory hold device of automatic exposure control type camera

Country Status (1)

Country Link
JP (1) JPS5538551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112237U (en) * 1991-03-15 1992-09-30 株式会社ニコン Camera with focus display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112237U (en) * 1991-03-15 1992-09-30 株式会社ニコン Camera with focus display device

Also Published As

Publication number Publication date
JPS6231333B2 (en) 1987-07-08

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