| 摘要 |
<p>In photographic apparatus comprising an electronic flash unit, a battery and a camera which has a manually actuable switch for initiating a photographic cycle and an exposure control system responsive to the switch actuation for initiating a photographic exposure interval closely following upon the manual actuation of the switch, the electronic flash unit includes a capacitor (24) having a very high value (for example 500 mu F) and the battery which charges this capacitor is of low internal impedance and high current discharge capability. The charging of the capacitor results directly from the actuation of the camera cycle-initiating switch and the capacitor is charged substantially to the battery voltage within the brief interval between the manual actuation of the camera switch and the commencement of the exposure interval.</p> |
