JPS5576335A - Automatic exposure control unit permitting automatic fading - Google Patents
Automatic exposure control unit permitting automatic fadingInfo
- 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
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
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)
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 |
-
1978
- 1978-12-01 JP JP14955878A patent/JPS5576335A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6227368B2 (en) | 1987-06-15 |
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