早期胶卷相机使用者对夜间摄影避而远之，原因在于，或者是合适景深所需的长时间曝光无法达到，或者是产生太多噪点。

Early film photographers shied away from capturing night scenes because these require prohibitively long exposures to maintain adequate depth of field, or produced unacceptable amounts of image noise.

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在夜晚，合适的聚焦非常关键，因为小光圈常常不合实际。 因此，你不能错误地定位景深 （超焦距）。

Proper focusing is critical at night because small apertures are often impractical — therefore one cannot afford to waste mispositioning the depth of field (see hyperfocal distance).

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