要景深浅除了大光圈还有这些办法：Depth of field (DOF) is a term which refers to the areas of the photograph both in front and behind the main focus point which remain "sharp" (in focus). Depth of field is affected by the aperture, subject distance, focal length, and film or sensor format. 我家老公用long focal length来达到景深浅的效果，不过这样脑袋常被削掉。