| 摘要 |
PURPOSE:To optimize the aperture value of a shutter corresponding to the time of emitting strobe light in a camera adopting a program shutter system by connecting a delay circuit means for delaying a shutter starting signal between a shutter starting signal outputting means and a shutter aperture value control means. CONSTITUTION:By depressing a shutter button L to a 1st stage, a control circuit 1 decides aperture waveform and light emitting timing. When the shutter button L is successively depressed to a 2nd stage, the control circuit 1 outputs the shutter starting signal. By receiving the signal at the same time, a stroboscope timer circuit 6 is started to be actuated. After the shutter starting signal is delayed by a timing adjustment circuit 5 by a time DELTAT set in the circuit 5, it is inputted in a pulse motor driving circuit 7 to form an aperture which coincides with the aperture waveform previously selected. When a time from output of the shutter starting signal to emitting light passes, the signal is outputted from the stroboscope timer 6 and the ideal aperture value can be obtained. |
