JPS5552035A - Exposure control device - Google Patents
Exposure control deviceInfo
- Publication number
- JPS5552035A JPS5552035A JP12654478A JP12654478A JPS5552035A JP S5552035 A JPS5552035 A JP S5552035A JP 12654478 A JP12654478 A JP 12654478A JP 12654478 A JP12654478 A JP 12654478A JP S5552035 A JPS5552035 A JP S5552035A
- Authority
- JP
- Japan
- Prior art keywords
- photometry
- mean
- step difference
- difference number
- spot
- 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
Abstract
PURPOSE: To perform automatic exposure control of intermediate mode by providing an arithmetic circuit of photometric values, etc. and performing the exposure controlling of not only two modes of mean photometry and spot photometry but also by giving weighting of arbitrary ratios to these two modes.
CONSTITUTION: By the first push of the shutter button, power source is supplied and photometry and display are started. When the subject positioned in the central part of the finder visual field is brighter than the surrounding parts, the output voltage level of the spot photometry becomes higher than mean photometry and the step difference number thereof is displayed as a positive value by a meter 11. IN such a case when the mean photometric value and spot photometric value coincide and the step difference number becomes 0, the same exposure is accomplished even if any of the contacts 16aW16e of a switch 16 is selected. When the step difference number such as +3 or -3 steps is indicated by the meter 11, any of the contacts 16aW16e is selected based on the intended composition. In this way, the automatic exposure controlling for the intermediate mode may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12654478A JPS5552035A (en) | 1978-10-13 | 1978-10-13 | Exposure control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12654478A JPS5552035A (en) | 1978-10-13 | 1978-10-13 | Exposure control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552035A true JPS5552035A (en) | 1980-04-16 |
Family
ID=14937803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12654478A Pending JPS5552035A (en) | 1978-10-13 | 1978-10-13 | Exposure control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552035A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57122367U (en) * | 1981-01-20 | 1982-07-30 | ||
JPS57169734A (en) * | 1981-04-14 | 1982-10-19 | Canon Inc | Photometric system using focus detecting optical system |
US4391500A (en) * | 1980-11-25 | 1983-07-05 | Canon Kabushiki Kaisha | Camera with exposure measuring system |
US4937610A (en) * | 1985-09-09 | 1990-06-26 | Minolta Camera Kabushiki Kaisha | Exposure control device for a camera |
US5017957A (en) * | 1985-09-09 | 1991-05-21 | Minolta Camera Kabushiki Kaisha | Exposure control device for a camera |
US5023649A (en) * | 1988-04-20 | 1991-06-11 | Minolta Camera Kabushiki Kaisha | Exposure controlling apparatus of a camera having a plurality of areas for measuring brightness |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5317725A (en) * | 1976-08-03 | 1978-02-18 | Minolta Camera Co Ltd | Exposure meter |
JPS5319027A (en) * | 1976-08-04 | 1978-02-21 | Minolta Camera Co Ltd | Exposure meter |
JPS5336229A (en) * | 1976-09-16 | 1978-04-04 | Asahi Optical Co Ltd | Exposure measuring system for singleelens reflex camera |
-
1978
- 1978-10-13 JP JP12654478A patent/JPS5552035A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5317725A (en) * | 1976-08-03 | 1978-02-18 | Minolta Camera Co Ltd | Exposure meter |
JPS5319027A (en) * | 1976-08-04 | 1978-02-21 | Minolta Camera Co Ltd | Exposure meter |
JPS5336229A (en) * | 1976-09-16 | 1978-04-04 | Asahi Optical Co Ltd | Exposure measuring system for singleelens reflex camera |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4391500A (en) * | 1980-11-25 | 1983-07-05 | Canon Kabushiki Kaisha | Camera with exposure measuring system |
JPS57122367U (en) * | 1981-01-20 | 1982-07-30 | ||
JPS57169734A (en) * | 1981-04-14 | 1982-10-19 | Canon Inc | Photometric system using focus detecting optical system |
JPS6250809B2 (en) * | 1981-04-14 | 1987-10-27 | Canon Kk | |
US4937610A (en) * | 1985-09-09 | 1990-06-26 | Minolta Camera Kabushiki Kaisha | Exposure control device for a camera |
US5017957A (en) * | 1985-09-09 | 1991-05-21 | Minolta Camera Kabushiki Kaisha | Exposure control device for a camera |
US5311244A (en) * | 1985-09-09 | 1994-05-10 | Minolta Camera Kabushiki Kaisha | Exposure control device for a camera |
US5023649A (en) * | 1988-04-20 | 1991-06-11 | Minolta Camera Kabushiki Kaisha | Exposure controlling apparatus of a camera having a plurality of areas for measuring brightness |
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