Exposure control apparatus of a camera
US5325147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1993 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Jul 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An exposure control apparatus of a camera having a photometer, a film sensitivity detector, a calculator which calculates an exposure value, a diaphragm value and a shutter speed in accordance with a measurement by the photometer and the film sensitivity, an object distance detector, a strobe, a limit diaphragm value calculator that calculates a first limit diaphragm value, which varies with the film sensitivity, and a second limit diaphragm value, which varies with the object distance, when strobe light is emitted, and a minimum limit diaphragm value setting device which compares the first and second limit diaphragm values and selects the larger diaphragm value as the minimum limit diaphragm value to be used in the exposure control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.