| 摘要 |
PURPOSE:To turn on a strobe securely even when a shutter attains to a minimum stop opening within a specific time after a shutter closure instruction is generated by turning on the strobe synchronously with the generation of a minimum stop pulse within the timer time of a timer circuit which is actuated at a specific period. CONSTITUTION:When a stop does not open before a shutter closure instruction signal generating circuit 4 generates the closure instruction and a stop detecting circuit 1 outputs no minimum stop detection pulse, the timer circuit 5 is actuated through an AND gate 15, D type FF6, and AND gate 9. When an AND gate 8 is opened and the circuit 1 outputs the minimum stop detection pulse within the timer period of the circuit 5, a strobe trigger circuit 3 operates to turn on the strobe securely synchronously when the shutter attains to the minimum stop opening within the specific period after the shutter closure instruction.
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