| 摘要 |
<p>In an automatic flash duration controllable electronic flash system of the type in which in response to the quantity of light reflected back from a subject illuminated by the flash light emitted from a flash lamp and intercepted by a photosensor circuit or the like, the flash lamp is turned off, a signaling device capable of signaling not only whether or not the voltage stored across a main discharge capacitor has reached to a predetermined level for flash exposure but also whether or not an automatic flash duration control after triggering the flash lamp has been completed.</p> |
