Definition: Depth of field is the section of the digital photograph in front of and behind the subject that will be in focus, too. Any objects outside of the scene's depth of field (DOF) will appear out of focus, or fuzzy. The distance to the subject, the aperture, and the focal length all affect depth of field in a photograph.
With a shallow, or narrow, depth of field, the subject will be in focus, along with anything a few feet in front of and behind the subject.
With a great, or wide, depth of field, the subject will be in focus, along with anything several to dozens of feet in front of and behind the subject.
Also Known As: DOF
