Nikon Nikon N75 instruction manual Depth of field

Basics of the relationship between focus and depth of field are explained in this section .

• Depth of field

When focusing, depth of field should be considered . Depth of field is the zone of sharpest focus in front of and behind the subject on which the lens is focused . It varies according to shooting distance, focal length and, above all, aperture. Smaller apertures (larger f-numbers) will produce a deeper depth of field where the background and foreground become sharper; larger apertures (smaller f-numbers) will produce a shallower depth of field where the background becomes blurred. Similarly, shorter shooting distance or longer focal length will produce a shallower depth of field, and longer shooting distance or shorter focal length will produce a deeper depth of field . Note that depth of field tends to be shallower in front of and deeper behind the subject in focus.

Large aperture f/2 .B Small aperture f/32

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