Nikon D300s - Manual (Page 135)

109
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 control
panel.
2
Choose an aperture.
Rotate the sub-
command dial while
the exposure meters
are on 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.
Small aperture (f/36) Large aperture (f/2.8)
I button
Main command dial
Sub-command dial