R: Aperture-Priority Auto - Nikon D300 User Manual

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Aperture-Priority Auto

In aperture-priority auto, you choose the aperture while the camera

automatically selects the shutter speed that will produce the

optimal exposure. To take photographs in aperture-priority auto:

Select exposure

Press the MODE button

and rotate the main

command dial until A is

displayed in the

viewfinder and control

Sub-command dial

Rotate the sub-

command dial to

choose the desired

aperture from values

between the minimum

and maximum for the

lens. Small apertures (high f-numbers) increase depth of field

(see page 105), bringing both foreground and background

into focus. Large apertures (low f-numbers) soften

background details in portraits or other compositions that

emphasize the main subject.

Choose an aperture.

Small aperture (f/36)

Large aperture (fiB)