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).

youdao

这样可以避免AS功能启动是由于实际的焦距不同带来的矫正错误。

This may avoid remedy mistake because of the actual different focal distance brings from AS function.

youdao