Exposure mode selecting device
US5895133A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1997 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Oct 1, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An exposure mode selecting device uses an A-position AE mode code, an M-position AE mode code, and a no-aperture-ring AE mode code, so that a proper exposure mode is selected. When an interchangeable lens, having an aperture ring being set to an A-position, is attached to a camera body, the A-position AE mode code is set to 0 or 1 so that a program mode or a shutter speed priority mode can be selected. If the aperture ring is set to one of the M-positions, the M-position AE mode code is set to 0, 1 or 2 so that an aperture priority mode, a manual mode or a bulb mode can be selected. When an interchangeable lens having no aperture ring is attached to the camera body, the no-aperture-ring AE mode code is set to 0, 1, 2, 3 or 4 so that the program mode, the shutter speed priority mode, the aperture priority mode, the manual mode or the bulb mode can be selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.