| 摘要 |
An electric signal of a level which corresponds to a required amount of flash light based on flash exposure conditions e.g. film sensitivity, aperture value and object distance data in a camera is fed to an electronic flash device. A charge completion detecting device in the electronic flash device compares this level of the electric signal from the camera with a charging level of a main capacitor, and outputs a charge completion signal when the charging level reaches a given level corresponding to the level of the electric signal from the camera. By this charge completion signal, flash firing and flash photography is enabled.
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