JPS564125A - Aperture control unit of camera - Google Patents
Aperture control unit of cameraInfo
- Publication number
- JPS564125A JPS564125A JP7866479A JP7866479A JPS564125A JP S564125 A JPS564125 A JP S564125A JP 7866479 A JP7866479 A JP 7866479A JP 7866479 A JP7866479 A JP 7866479A JP S564125 A JPS564125 A JP S564125A
- Authority
- JP
- Japan
- Prior art keywords
- stopping
- aperture
- comparator
- output corresponding
- time
- 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
Links
Landscapes
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To enable accurate aperture controlling even in the case when stopping- down metering output contains fluctuating components by applying the correction output corresponding to stopping-down errors to one input of a comparator when it is detected that the lapse time from the start of stopping-down has corresponded to the specified aperture value.
CONSTITUTION: This comprises comparing both outputs of a photometric circuit 2 which generates the stopping-down metering output corresponding to the light past the stop which is stopped down from a full-aperture state toward the minimum stop aperture prior to starting of exposure and a setting circuit 1 which generates the output corresponding to the preset shutter second timer or aperture value in a comparator 4, wherein when it is detected that the lapse time from the instantaneous stopping-down start time has corresponded to the preset aperture time the stopping-down inhibit signal of the comparator 4 is output slightly earlier to permit the actual stoppling-down inhibition by a stopping-down inhibiting device 5 at a desired aperture value.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7866479A JPS564125A (en) | 1979-06-23 | 1979-06-23 | Aperture control unit of camera |
US06/158,307 US4307948A (en) | 1979-06-13 | 1980-06-10 | Diaphragm control apparatus for camera |
DE3022081A DE3022081A1 (en) | 1979-06-13 | 1980-06-12 | DEVICE FOR CONTROLLING THE PANEL FOR A CAMERA |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7866479A JPS564125A (en) | 1979-06-23 | 1979-06-23 | Aperture control unit of camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS564125A true JPS564125A (en) | 1981-01-17 |
Family
ID=13668121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7866479A Pending JPS564125A (en) | 1979-06-13 | 1979-06-23 | Aperture control unit of camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS564125A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02191923A (en) * | 1989-12-19 | 1990-07-27 | Nikon Corp | Stop controller |
JPH02232311A (en) * | 1989-03-03 | 1990-09-14 | Honda Motor Co Ltd | Automatic inoculating apparatus |
-
1979
- 1979-06-23 JP JP7866479A patent/JPS564125A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02232311A (en) * | 1989-03-03 | 1990-09-14 | Honda Motor Co Ltd | Automatic inoculating apparatus |
JPH02191923A (en) * | 1989-12-19 | 1990-07-27 | Nikon Corp | Stop controller |
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