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2 [D] DOF (Depth of Field)

DOF refers to the range of distance that the subject appears acceptably sharp. DOF is determined by several factors such as aperture size, lens to subject distance, lens focal length, and image sensor size.
Generally, the following conditions result in a deep DOF.
- small or narrow aperature size (large f number)
- long distance between lens and subject
- short focal length
- small image sensor size (small image format)
A shallow DOF has reverse condition of a deep DOF.

1 [A] AEC (Automatic Exposure Control)

The camera controls its exposure time automatically by setting the aperture or shutter speed, based on the external lighting conditions.