Camera with night photography apparatus
US4933702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A controller recognizes the requirement for taking a scenic picture when a scenic picture-taking button is operated to indicate that a scene to be photographed is at infinity rather than at the longest focusable distance of an automatic focusing device, and then sets a taking lens system at an infinity focusing lens position, overriding the automatic focusing device. At the same time, when the scene at infinity is darker than a predetermined brightness level, the controller sets a shutter to open for a predetermined night photography exposure time which is greater than the maximum exposure time that could be set by an automatic exposure control device. When taking a night photograph, light emission from a strobe is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.