PURPOSE: To make a recovery value high and an automatic winding camera inexpensive by reusing the stroboscopic board recovered from the recovered film unit with a lens for the automatic winding camera.

CONSTITUTION: The stroboscopic board 50 on which an electric flash light emitting xenon lamp tube 7, a trigger switch 10 detecting the opening/closing states of a shutter blade 36 and a stroboscopic circuit for letting the xenon lamp tube 7, emit electric flash light based on the trigger switch 10 are mounted is recovered from the film unit with the lens, the extended part of the recovered stroboscopic board 50 is cut off and simultaneously an exchange for a booster transformer having a half boosting rate is executed to reuse the recovered stroboscopic board 50 for the automatic winding camera.