| 摘要 |
PURPOSE:To make the strobe photographing of various modes possible by providing a delay circuit between a light sensitive element and switching element, in the remote light emitting device of the camera. CONSTITUTION:An SCR4 is actuated by way of switches 2, 6 by the incidence of internal light to a photo diode (PT)1 so that the light emitting device connected to synchronizing terminals 5, 5 is let to emit light. When the switches 2, 6 are reversed, the gate of the SCR4 is disconnected from the PT1 and is connected to the cathode of a PUT20. In addition, an electric power source 12 is connected to the circuit. When internal light enters the PT1, a transistor (TR)3 goes ON and TRs 10, 13 go OFF, by which a capacitor 19 is charged. When its charging voltage exceeds the stand-OFF point of the PUT20, the PUT20 goes ON and the capacitor 19 is discharged, thence the TR13 goes ON and the SCR14 actuates. A switch 17 is used for changing over of the delay time. Thereby, diversified photographings such as multistrobe and continuous photographing are made possible. |
