FLASH APPARATUS AND AUXILIARY BATTERY APPARATUS

摘要

A flash apparatus operates on power supplied from internal batteries and an external battery in an auxiliary battery apparatus. A battery check is executed by detecting the charge speed at which a main capacitor is charged and comparing the charge speed with a threshold value. The threshold value is set higher when the auxiliary battery apparatus is mounted than the threshold value set when the auxiliary battery apparatus is not mounted. Thus, an accurate battery check reflecting the presence/absence of the auxiliary battery apparatus can be achieved.