| 摘要 |
PURPOSE:To check unnecessary charging and power consumption and keep the interval of photographing constant by carrying out photometry before the time required for the completion of charging to an electronic flashing device and starting the charging when the photometric level falls prescribed number or less. CONSTITUTION:Clocks from an oscillation circuit 2 are counted by a ring counter 3 and, when a high-level signal is inputted to the counter after outputting the prescribed number of counting to a contact 11b of a rotary switch 11, a flip-flop 14 is set up, a photometric signal is outputted and a photometric circuit 18 starts to operate. If the photometric output is smaller than the prescribed number, an electronic flashing device 26 starts charging by an output from a comparator 23. When a high-level signal is outputted to a contact 11a after counting prescribed number, a camera controlling circuit 24 is actuated, the flashing device 26 emits light and the circuit 14 and the counter 3 are reset. When the photometric output is prescribed number of more, the flashing device does not perform charging, but is released. |
