| 摘要 |
A flash control device for a camera includes a light emission unit which emits light to illuminate a subject to be imaged by the camera, a preliminary light emission control unit which causes the light emission unit to emit light during a preliminary light emission operation prior to a main exposure operation to be performed by the camera and until a predetermined amount of light is received by the camera during the preliminary light emission operation, a range computing unit which computes a distance from the camera to the subject, an exposure calculation unit which computes an aperture value for the camera during the preliminary light emission operation, a main light emission calculation unit which calculates a length of time that the light emission unit is to emit light during a main light emission operation based on the preliminary light emission operation, the computed distance to the subject, and the aperture value, and a main light emission control unit which controls the emission of light by the light emission unit during a main exposure operation within the camera based on an output of the main light emission calculation unit. A corresponding method for controlling an electronic flash unit adapted for use with a camera or other imaging device also is provided.
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