| 摘要 |
<p>PURPOSE:To make possible photographing using auxiliary light with a focal plane shutter camera at the high-speed shutter time, too, by comparing the shutter speed of a tuning limit in flash emission photographing and the selected shutter speed, and selecting a light emission mode. CONSTITUTION:When the set shutter speed of a shutter speed setting device 5 goes higher than the fixed shutter speed from a tuning limit shutter speed data outputting circuit 7 in flash emission, the output of a comparator 13 inverts to a high level. Then, a gate 15 opens, through which the shutter from the device 5 is applied to the discriminating circuit 43 of a light emitting device 1 via a D/A converter 35, by which a flat emission time circuit 45 and a flat emission intensity controlling circuit 47 are activated and a flat emission mode is selected. The circuits 45, 47 are controlled by way of switches S1, S2 interlocking to the front and rear curtains of the focal plane shutter, and the required flat emission by a light emitting part 53 is accomplished, thus auxiliary light photographing is performed with the focal plane shutter camera at the high speed shutter time above the flash tuning limit, too.</p> |
