JPS5576335A - Automatic exposure control unit permitting automatic fading - Google Patents

Automatic exposure control unit permitting automatic fading

Info

Publication number
JPS5576335A
JPS5576335A JP14955878A JP14955878A JPS5576335A JP S5576335 A JPS5576335 A JP S5576335A JP 14955878 A JP14955878 A JP 14955878A JP 14955878 A JP14955878 A JP 14955878A JP S5576335 A JPS5576335 A JP S5576335A
Authority
JP
Japan
Prior art keywords
driven
automatic
fading
aperture member
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.)
Granted
Application number
JP14955878A
Other languages
Japanese (ja)
Other versions
JPS6227368B2 (en
Inventor
Tatsuya Natori
Kazuharu Takizawa
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.)
Fujinon Corp
Nippon Seimitsu Kogyo KK
Original Assignee
Nippon Seimitsu Kogyo KK
Fuji Photo Optical 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 Nippon Seimitsu Kogyo KK, Fuji Photo Optical Co Ltd filed Critical Nippon Seimitsu Kogyo KK
Priority to JP14955878A priority Critical patent/JPS5576335A/en
Publication of JPS5576335A publication Critical patent/JPS5576335A/en
Publication of JPS6227368B2 publication Critical patent/JPS6227368B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To make possible automatic fading by comparing the time required for stopping-down and the time required for a certain step number from a correct exposure aperture value state and changing over the speed of a stepping motor.
CONSTITUTION: After the 1st, 2nd mode changeover switches SW1, SW2 are set in a fade-in photographable state, so-called EE operation is accomplished by the first-stage operation of shutter release. Thereafter, an aperture member 10 is driven at a high speed up to closing by the second-stage operation of shutter release. As a photographing operation timing switch is substantially turned ON, the aperture member 10 is driven to the open side at a high speed during the specified time determined by a memory capacitor C0 and resistor R0. Thereafter the aperture member 10 is so operated as to be driven up to the correct exposure aperture value state at a low speed during the time determined by monostable multivibrators Tr1, Tr2.
COPYRIGHT: (C)1980,JPO&Japio
JP14955878A 1978-12-01 1978-12-01 Automatic exposure control unit permitting automatic fading Granted JPS5576335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14955878A JPS5576335A (en) 1978-12-01 1978-12-01 Automatic exposure control unit permitting automatic fading

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14955878A JPS5576335A (en) 1978-12-01 1978-12-01 Automatic exposure control unit permitting automatic fading

Publications (2)

Publication Number Publication Date
JPS5576335A true JPS5576335A (en) 1980-06-09
JPS6227368B2 JPS6227368B2 (en) 1987-06-15

Family

ID=15477788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14955878A Granted JPS5576335A (en) 1978-12-01 1978-12-01 Automatic exposure control unit permitting automatic fading

Country Status (1)

Country Link
JP (1) JPS5576335A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4965810B2 (en) * 2005-03-31 2012-07-04 キヤノン株式会社 Imaging apparatus and control method thereof

Also Published As

Publication number Publication date
JPS6227368B2 (en) 1987-06-15

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