Nikon D3S - Manual (Page 149)

123
Z
g: 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:
1
Select exposure
mode g.
Press the I button
and rotate the main
command dial until g is
displayed in the
viewfinder and top
control panel.
2
Choose an aperture.
Rotate the sub-
command dial while the
exposure meters are on
to choose an aperture
from values between
the minimum and
maximum for the lens. Small apertures (high f-numbers)
increase depth of field (see page 119), 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.
Aperture can be locked at the selected setting ( 0 131).
Small aperture (f/36) Large aperture (f/2.8)
I button
Main command dial
SHOOT
CUSTOM
Sub-command dial