PURPOSE: To prevent an overexposure at the time of printing a flash light photograph taken by using a negative film by means of an automatic printer by constituting the above controller in such a manner that a stroboscopic light emission quantity is shifted from a correct value to an underexposure side in correspondence to the information on the film sensitivity if the film to be used is the negative film.

CONSTITUTION: A DX code reading means 1 reads the DX codes of the film and supplies the codes to a CPU consisting of a latitude detecting means 2 to a stroboscopic light emission quantity shifting means 6. A stroboscopic light emission quantity determining means 7 purposely shifts the information on the stroboscopic light emission quantity supplied from an exposure control computing means 5 from the correct value by as much as the shift correction quantity supplied from a stroboscopic light emission quantity shifting means 6 and supplies the information to a stroboscope circuit 8, by which the actual stroboscopic light emission is executed. The tendency that the main subject is exposed to the overexposure side is corrected by the automatic exposure correction at the time of printing in a laboratory when the negative film is used.