这样的话，可以通过后期处理减弱曝光度，同时因为相机感光较多，可以把噪点限制到最少。

This way the exposure can always be decreased afterwards — while still maintaining minimal image noise because more light was collected at the digital sensor.

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你必须在景深、曝光时间和噪点之间做出权衡。

Photos are unavoidably limited by the trade-off between depth of field, exposure time and image noise.

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相机的测光方式要设置在局部测光或点测光方式，测光点对着你想要锁定曝光值的目标，按下锁定钮。

To make this work, use the partial metering mode (or spot metering mode) over the subject where you want to lock the flash output then press the asterisk (*) button.

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