Camera having a variable photographing aperture and control method thereof
US5305051A · kind A · utility
13Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1993 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Feb 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/248
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera having a variable photographing aperture, including a photographing aperture size changing device that changes the size of the photographing aperture, and an exposure calculating device for calculating exposure factors including a diaphragm value and a shutter speed in accordance with the brightness of an object to be photographed. The camera further includes an exposure adjusting device which modifies the exposure factors when the photographing aperture is changed. The invention is also directed to a control method of a variable photographing aperture camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.