PURPOSE: To execute the stroboscopic photographing of only a fully charged strobe by forming a trigger signal for emitting each strobe at the full opening of a shutter or after the delay of a prescribed time from the generation of a prescreen traveling starting signal.

CONSTITUTION: If shutter release is executed when a strobe 20 has been charged before the charging of a master capacitor in the strobe 10 is completed, strobe 10 emission due to the 1st trigger signal is not executed and the 2nd trigger signal delayed by a delay circuit in a trigger circuit 40 is turned to 'L' to emit a strobe 20. When the reflected light from an object reaches a value corresponding to a proper exposure value during the emission of the strobe 10, an emission stopping signal S4 is inverted to ' to stop the emission of the strobe 10 and the 'H' signal S4 is also supplied to the strobe 20 to stop its emission. Consequently, shutter release is executed without waiting until the charging of all the strobes is completed and stroboscopic photographing only for the fully charged strobe can be executed.