Patent ID: 9185305
Filing Date: 2015-11-10
Classification: G03B,H04N

Abstract:
1. A photography system, comprising: a camera that is electrically connected with a first communication unit; and a photography illumination device that is electrically connected with a second communication unit, wherein: the camera wirelessly transmits from the first communication unit to the second communication unit a first signal that commands, from the camera side to the photography illumination device side, a preparatory flash emission that precedes a main flash emission during photography; the photography illumination device wirelessly transmits from the second communication unit to the first communication unit a second signal that includes flash emission timing information of the preparatory flash emission, and that carries information, from the photography illumination device side to the camera side, as to the effect that the first signal has been received; the camera starts photometric processing during the preparatory flash emission based upon the flash emission timing information; the flash emission timing information includes information about a time difference from a reference signal in the second signal until the preparatory flash emission is started, and information about a light emission interval of the preparatory flash emission; and if the second signal has not been received by the first communication unit even after having waited a predetermined time period after wirelessly transmitting the first signal, then the camera wirelessly re-transmits the first signal.