To enable a storage control action for optimum automatic focusing to be executed by using stroboscopic light as auxiliary light regardless of the distance to an object.

This device is provided with an intermittent light emission instruction means (#104 → #105 → # 106 → #107) making a stroboscope device intermittently emit the light as the auxiliary light used at an automatic focusing time in the midst of storing a photoelectric conversion element for automatic focusing and a light quantity control means (#107 → #110 and #121) controlling the respective light quantity of intermittent light emitting time.