| 摘要 |
<p>PURPOSE:To maintain the same exposure by increasing either of an exposure time and an aperture value determined by a program diagram selected between program diagrams for natural light photography and flash light photography by a manual operation means and decreasing the other by the same extent. CONSTITUTION:A photographic lens 19 and an electronic flash device 20 are mounted detachably on a camera body 1. A light measurement part 13 is equipped with a photodetecting element 16 for averaged light measurement and a photodetecting element 17 for spot light measurement. Switches So, Su, Sd, and Sa are operated with a main switch 2, an up key 4, a down key 5, and an AE lock switch 6. The camera is operated selectively in program modes for natural light photography and flash light photography and the combination of an exposure time and an aperture value determined on the basis of the program mode of a selected program mode is computed by a microcomputer 11 so that one of the exposure time and stop value is increased or decreased with keys 4 and 5 and the other is decreased by the same extent. Thus, an exposure control part 14 performs control while maintaining the same exposure.</p> |
