| 摘要 |
PURPOSE:To adjust rapidly by detecting latitude information applied to a film to be used automatically and changing the displayed contents of a display device. CONSTITUTION:ASA information SVA applied to the film 2 or ASA information SVM set up manually is inputted to an arithmetic processing circuit OP1. Comparators C1-C4 compare exposure information from the arithmeric processing circuit OP1 with reference voltage of networks NW1-NW5 respectively, and when exposure is excessive, all the outputs of the comparators C1-C4 are turned to the H level, so that only the output of a gate G2 is turned to the L level and only an LED L2 is turned on. When the exposure is slightly excessive, but is close to proper state, only the output of the comparator C4 is turned to the L level and all the outputs of the comparators C1-C3 are turned to the H level, so that both the LEDs L1, L2 are turned on. When the exposure is proper, the outputs of the comparators C1, C2 are turned to the H level and only the LED L1 is turned on in the same manner. When the exposure is slightly insufficient, but is close to proper state, only the output of the comparator C1 is turned to the H level and both the LEDs L1, L3 are turned on. When the exposure is insufficient, only the LED L3 is turned on. Thus, an exposure range is expanded and rapid photographing is attained. |
