| 摘要 |
In an electroflash unit attachable to a camera provided with a circuit for measuring light transmitted through a photographing lens, a signal by which TTL flash output control circuit on the camera's side can be actuated is generated. The electroflash unit comprises; (1) a terminal for connection to the camera (2) a circuit for effecting flashing (3) a circuit for terminating said flashing in accordance with the output from said light measuring circuit on the camera and (4) a circuit for generating, on said terminal, a predetermined signal by which said light measuring circuit is brought into the state ready for operation.
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