A: aperture-priority auto, G: aperture-priority auto – Nikon D300s User Manual

Page 135

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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

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