Flash-assisted photographing system and a device for use in the same
US5815743A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/09979
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A flash-assisted photographing system including a camera having a taking lens capable of varying the focal length and a flash is provided with a light receiving unit having a plurality of receiving areas operable to separately receive light reflected by different areas of a photographic view, a detector operable to detect a focal length of the taking lens, and a controller operable to set weights for the receiving areas based on a detected focal length. Proper weights are set for the receiving areas even in the case of close-up photography which is highly influenced by camera shake. A main subject can be reliably exposed at a proper light emission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.