Image pickup system and control apparatus that perform manual light emission control of sender device and receiver device, and control method and storage medium therefor

Abstract

An image pickup system, which includes an image pickup apparatus, a sender device and a receiver device each including a light emission part and controls light emission amounts thereof, and which achieves the best light emission performance at the time of manual light emission. In the image pickup system: the image pickup apparatus sets manual light emission amounts of the sender device and receiver device, and sets light emission activated setting or light emission deactivated setting on the sender device; the sender device changes a light emission amount settable range in which the manual light emission amount is settable, based on a setting set on the sender device, and notifies the receiver device of the set manual light emission amount; and the receiver device updates the manual light emission amount of the receiver device based on the notified manual light emission amount.