FR842513A - Improvements to cameras - Google Patents
Improvements to camerasInfo
- Publication number
- FR842513A FR842513A FR842513DA FR842513A FR 842513 A FR842513 A FR 842513A FR 842513D A FR842513D A FR 842513DA FR 842513 A FR842513 A FR 842513A
- Authority
- FR
- France
- Prior art keywords
- cameras
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US842513XA | 1937-08-24 | 1937-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR842513A true FR842513A (en) | 1939-06-14 |
Family
ID=22183766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR842513D Expired FR842513A (en) | 1937-08-24 | 1938-08-23 | Improvements to cameras |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR842513A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1188931B (en) * | 1957-06-22 | 1965-03-11 | Agfa Ag | Photoelectric device for the automatic control of a diaphragm arranged in the objective beam path of a photographic device |
-
1938
- 1938-08-23 FR FR842513D patent/FR842513A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1188931B (en) * | 1957-06-22 | 1965-03-11 | Agfa Ag | Photoelectric device for the automatic control of a diaphragm arranged in the objective beam path of a photographic device |
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