| 摘要 |
<p>PURPOSE:To facilitate the operation of the device by providing a boosting circuit and a voltage check circuit. CONSTITUTION:Boosting circuit consisting of oscillation circuit and boosting transformer, etc. which boosts the voltage of electric cell E, and voltage check circuit 3 which checks the charged voltage of capacitor C1 which supplies the voltage to automatic focus control device are provided. Thus, at the time of common photographing where switches S3, S4 are in contact with the side of the contact, when shutter button is depressed, switch S1 is closed to energize exposure control circuit 1 and boosting circuit 2. After the capacitor C1 has been charged, switch S2 is closed. When the voltage of the capacitor C1 reaches the predetermined level, the focus control device 4 works. On the other hand, at the time of flash photography, both capacitors C1 and C2 are charged, and the focus control device 4 works on account of charging of the capacitor C2.</p> |
