| 摘要 |
<p>PURPOSE:To provide both functions for synchronizing the frame speed of a motor drive and flash emission and automatic dimming by stopping the flash emission at every supply of the energy of a main capacitor at a specified rate and to inhibit photographing by flash emission when the times of the flash emission attain set times. CONSTITUTION:Prescribed number of pulses are generated from a detecting circuit 5 in accordance with charging of a main capacitor CM, and times of flash emission are set in a shift register SR1 via an AND gate G4 and are displayed by diodes D1, D2... etc. When the flash is emitted at every closing of synchronizing contacts Sx in synchronization with the frame feeding of a motor drive, a transistor TR1 is turned off by the photometric pulses of a low level from the terminal (f) of a detecting circuit 3, and the emission of flash is stopped automatically with a comparator CP after the prescribed time synchronized with the frame feeding. On the other hand, the flash photographing is inhibitied by the output of a register SR1 responding to the flash emission trigger after the end of the set times.</p> |
