Exposure control apparatus
US4160588A · kind A · utility
9Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Mar 30, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an aperture preferred exposure control apparatus for a photographic camera, scene light is received by an exposure time determining photocell and a low light determining photocell. The received light is attenuated at different rates respectively for the two photocells to change the shutter speed at which a low light signal will result as a function of the particular size exposure aperture selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.