Nikon D40 Guide - Mode a (Aperture-Priority Auto)

In aperture priority auto, you choose the aperture from values between the minimum and
maximum for the lens while the camera automatically selects the shutter speed that will
produce the optimal exposure. Small apertures (high f/numbers) increase depth of field,
bringing both the main subject and background into focus. Large apertures (low f/num
hers) soften background details.
To take photographs in aperture priority auto:
Rotate the mode dial to A.
2 Rotate the command dial until the desired aperture is dis
played in the viewfinder (aperture carl also be displayed in the _ _
monitor by pressing ttne _ button).
N
Frame a photograph, focus, and stloot.
42 Reference:P,S,A,and M Modes/ModeA (Aperture-PriorityAuto)