| 摘要 |
An automatic light-quantity-control speed light which is capable of operating in a direct or an indirect illumination mode incorporates a device for indicating, prior to an exposure, whether or not light quantity control is possible in the direct illumination mode, and for indicating, subsequent to an exposure, whether or not a light quantity control operation occurred during an exposure in the indirect illumination mode. The device includes a first detecting circuit for determining whether or not the guide member determined by preset exposure factors is outside of the guide number range in which light quantity control can be effected and a second detecting circuit for detecting whether or not a light quantity control operation occurs during an exposure. A display circuit is connected to the first detecting circuit in the direct illumination mode, and is connected to the second detecting circuit in the indirect illumination mode. The display circuit may be automatically connected to the appropriate detecting circuit in accordance with the illumination mode in which the speed light is operated.
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