| 摘要 |
A system for flash photography, having means for adjusting the amount of flash light on the basis of the intensity distribution of the photographic scene measured in advance with and without a preliminary flash operation. The flash has an intensity feedback control for producing a flat emission profile (emission of constant intensity over a predetermined time) during the preliminary flash operation and, if required, the main flash operation. The flash includes a frontal Fresnel lens (21) and a movable reflector (20) for flash-zoom operation. The camera has a plurality light receiving means for measuring the intensity distribution of the scene, an automatic focusing system and a variable focal length system (zoom). The system comprises means for selecting scene portions on which intensity calculation is to be based, means for correcting for abnormal reflection from the scene, means for detecting back light illumination and means for detecting ambient light having a flicker component. |
