Nikon D4 - Manual (Page 154)

128
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. Large apertures (low f-numbers) increase flash
range (
0 192) and reduce depth of field, blurring objects behind
and in front of the main subject. Small apertures (high f-numbers)
increase depth of field, bringing out details in the background and
foreground. Short field depths are generally used in portraits to
blur background details, long field depths in landscape
photographs to bring the foreground and background into focus.
To choose an aperture
between the minimum and
maximum values for the lens,
rotate the sub-command dial
while the exposure meters are
on. Aperture can be locked at
the selected setting (
0 133).
Small aperture (f/36) Large aperture (f/2.8)
A
Non-CPU Lenses ( 0 385, 388)
Use the lens aperture ring to adjust aperture.
If the maximum aperture of the lens has been
specified using the Non-CPU lens data item
in setup menu (
0 229) when a non-CPU lens is
attached, the current f-number will be
displayed in the viewfinder and top control
panel, rounded to the nearest full stop.
Otherwise the aperture displays will show only the number of stops
(F, with maximum aperture displayed as F
A) and the f-number must
be read from the lens aperture ring.
Sub-command dial