还记得前面提到的闪光灯预闪吗？
闪光灯会预闪并把曝光值记忆下来，注意你只有16秒的时间重新构图拍摄。
The speedlight will pre-flash that area and lock that exposure into memory. I might caution you that you have 16 seconds to then recompose and take the shot.
闪光灯输出功率的计算仍然是根据预闪反射光的中心加权测量结果。
The flash power calculation is also based on centre-weighted metering of the light reflected by the pre-flash.
闪光灯输出功率的计算仍然是根据预闪反射光的中心加权测量结果。
The flash power calculation is also based on centre-weighted metering of the light reflected by the pre-flash.
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