TTL exposure control apparatus in an interchangeable lens camera
US5713053A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A TTL exposure control apparatus having a camera body to which different interchangeable lenses can be detachably attached is disclosed. At least one of the interchangeable lenses is an interchangeable wide-angle lens having a distortion. The wide-angle lens has a memory for storing an exposure correction value corresponding to the distortion. The camera body includes a photometering device which measures photometering data using light transmitted through the interchangeable lenses, and a photometering data correcting device for correcting the measurements by the photometering device in accordance with the exposure correction value read from the memory when the interchangeable wide-angle lens is attached to the camera body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.