Yanik's Photo School

Depth of Field (DOF)

Depth of field (DOF) is the area of the photograph which remain in focus both in front and behind the main focus point. Depth of field is affected by the aperture, subject distance, focal length, sensor format.

With subject distance, focal length and sensor format remaining constant, DOF is controlled by aperture.  The bigger the aperture (smaller f-stop number) the shallower the DOF. Here are some examples:

aperture at f1.8

Intro_06_1

aperture at f5.6

Intro_06_2

aperture at f11

Intro_06_3

aperture at f22

Intro_06_4

For the geek in you, check out a detailed DOF review at Wikipedia

March 14, 2015
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