| 摘要 |
PURPOSE:To control exposure within the limit of exposure control by decreasing exposure at the prescribed rate by exposure control means as well as increasing sensitivity only at the prescribed rate out of limit of exposure control. CONSTITUTION:An arithmetic control circuit 8 operates photographing conditions from output condition of a photometric circuit 12, a shutter second time set circuit 13, a stop set circuit 14, a mode selection circuit 15, and integration circuit 17, etc. The integration circuit 17 is for the purpose of integrating a video signal through a gain control circuit 6. The arithmetic control circuit indicates exposure information in the input terminal of a gate circuit 23 as well as controlling stop driving circuit 9 for driving stop 2 based on the photographic condition operated, a shutter driving circuit 10 for driving shutter, a clock driver 11 for driving an image pickup element, a gain control circuit 6, an oscillator 19 and a switch circuit 21. |
