| 摘要 |
<p>An indicating system for use in a photographic camera of the type having a focal plane shutter and permitting flash firing only when the shutter speed is longer than a given value to ensure the full uncovering of the film surface upon flash firing. The indicating system normally indicates an exposure time to be effected in accordance with the object brightness. When the indicated prospective exposure time is longer than the given value, an indication member of the system provides a different indication than the normal exposure time indication. The indicating system includes a plurality of light emitting diodes (LEDs) of the same number corresponding to that of the exposure times to be indicated, with the LEDs being selectively energized continuously to indicate a respective exposure time. When the object brightness is so low that one of the LEDs corresponding to an exposure time longer than the given value is energized, the LED to be lit is intermittently energized to flash upon charge completion of the main capacitor of an electronic flash device.</p> |
