depth of field

A macro photograph showing the defocused effect of a shallow depth of field on a tilted page of text This photo was taken with an aperture of f/22, creating a mostly in-focus background. The same scene as above with an aperture of f/1.8. Notice how much blurrier the background appears in this photo. The depth of field (DOF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image captured with a camera. See also the closely related depth of focus.

Factors affecting depth of field