Nikon Nikkormar FT3 Manual de instrucciones - Página 21

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DEPTH OF FI ELD

Depth of field refers to a zone extending in front of

and behind the plane of sharpest focus. Within this

zone blur (or unsharpness of the image) will be

negligible and everything can be accepted as in sharp

focus. Depth of field extends a greater distance behind

the subject in focus than in front. Depth of field

depends on three factors: focal length of the lens,

lens-to-subject distance and taking aperture. The

smalier the aperture and the shorter the focal length

of the lens, the greater the depth of field (for example,

wide angle lenses have more depth of field than tele-

photos). Also, the closer the subject, the smalier the

depth of field

These three factors can be adjusted

independently or in combination to give the photo-

grapher creative control over the final picture.

Depth-ot-Field Preview Button

The depth-of-field preview button located on top of

the Nikkormat lets you check depth of field before

shooting and make desired adjustments. Press the

button and the lens stops down to the preselected

aperture to aliow you to see how much background

or foreground is in or out of focus.