JPS5540438A - Camera having automatic focus adjusting device - Google Patents

Camera having automatic focus adjusting device

Info

Publication number
JPS5540438A
JPS5540438A JP11304878A JP11304878A JPS5540438A JP S5540438 A JPS5540438 A JP S5540438A JP 11304878 A JP11304878 A JP 11304878A JP 11304878 A JP11304878 A JP 11304878A JP S5540438 A JPS5540438 A JP S5540438A
Authority
JP
Japan
Prior art keywords
signal
shutter
output
timer
adjusting device
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
JP11304878A
Other languages
Japanese (ja)
Inventor
Tetsuya Taguchi
Shuichi Tamura
Ryuji Tokuda
Masahiko Ogawa
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 JP11304878A priority Critical patent/JPS5540438A/en
Priority to US06/074,313 priority patent/US4350418A/en
Priority to DE2937288A priority patent/DE2937288C2/en
Publication of JPS5540438A publication Critical patent/JPS5540438A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To prevent waste of film by prohibiting shutter release while in-focus signal is not given, by releasing the shutter with the AND output of range measuring signal and timer signal.
CONSTITUTION: An in-focus signal according to the output of a phtometric element 23 of a range measuring circuit A is inputted into an AND gate D255. A timer circuit composed of capacitor 52 starts to operate. The delay time of the timer circuit is a duration sufficient to allow the mechanism of the range finder to be stabilized. When the output of the AND gate 55 becomes high level, a transistor 57 becomes ON, and a charge collected in a capacitor 59 flows into a magnet Mg1 to unlock the detent level, so that the shutter is released. Since the shutter is released by the range measuring completion signal from the automatic focus adjusting device and the timer signal, failure in focal adjustment may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP11304878A 1978-09-14 1978-09-14 Camera having automatic focus adjusting device Pending JPS5540438A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11304878A JPS5540438A (en) 1978-09-14 1978-09-14 Camera having automatic focus adjusting device
US06/074,313 US4350418A (en) 1978-09-14 1979-09-11 Camera provided with automatic focus adjusting device
DE2937288A DE2937288C2 (en) 1978-09-14 1979-09-14 Camera with an automatic focusing device for a lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11304878A JPS5540438A (en) 1978-09-14 1978-09-14 Camera having automatic focus adjusting device

Publications (1)

Publication Number Publication Date
JPS5540438A true JPS5540438A (en) 1980-03-21

Family

ID=14602163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11304878A Pending JPS5540438A (en) 1978-09-14 1978-09-14 Camera having automatic focus adjusting device

Country Status (1)

Country Link
JP (1) JPS5540438A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456360A (en) * 1980-07-03 1984-06-26 Canon Kabushiki Kaisha Camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456360A (en) * 1980-07-03 1984-06-26 Canon Kabushiki Kaisha Camera

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