Patent ID: 9525812
Filing Date: 2016-12-20
CPC Classification: G03B,H04N,H05B

Claim Text:
1. A master flash apparatus which is connected to an image capturing device, and emits light when said image capturing device outputs a synchronous light emission command synchronized with traveling of a shutter after said image capturing device outputs a first light emission start command, wherein said master flash apparatus can perform wireless communication with a slave flash apparatus which emits light in response to a second light emission start command received from said master flash apparatus, and said master flash apparatus comprising: a transmission unit configured to transmit the second light emission start command to said slave flash apparatus when a predetermined time has elapsed after said image capturing device outputs the first light emission start command; a measurement unit configured to measure a time from the output of the first light emission start command from said image capturing device to the output of the synchronous light emission command from said image capturing device; and an adjustment unit configured to adjust the predetermined time based on the time measured by said measurement unit.