Furthermore, split exposure is performed by means of a shutter such that predetermined light exposure is attained in the time of seconds of the shutter where the emission of auxiliary light causes no blurring and the diode is unlighted when a predetermined exposure is attained. また、補助光の発光が手ぶれの発生しないシャッター秒時でシャッターにより所定露光量となるよう分割露光し、所定露光となった後に消灯する。 - 特許庁