dim. The AF-assist illuminator only
lights when in Single Focus mode
(AF-S) or Autofocus mode (AF-A)
when using the center AF point.
When using M, A, S, or P, the
AF-assist illuminator can be
switched on or off in CSM a3.
When using a Scene mode, this
is set automatically.
Function (Fn) button. This button
can be assigned to provide diff er-
ent functions. You can set the but-
ton to display a framing grid in the
viewfi nder, change the AF Area
mode, move the focus point to the
center, lock the fl ash exposure
value (FV Lock), switch the fl ash
off , change Metering modes, access
the top My Menu item, or shoot a
RAW fi le in conjunction with the
current JPEG setting. The Function
(Fn) button can be assigned to a
specifi c function in CSM f3.
Depth of Field Preview button.
Also known simply as the Preview
button, pressing this button stops
down the aperture of the lens so
you can preview how much of the
subject is in focus. The image in the
viewfi nder gets darker as the aper-
ture decreases.
Sub-command dial. By default, this
dial is used to change the aperture
setting. Pressing the WB button and
then rotating this dial fi ne-tunes the
current WB setting. When set to PRE
WB, rotating this dial allows you to
select from one of the fi ve available
custom presets that you can save.
Chapter 1
Exploring the Nikon D90
Sides and bottom
of camera
The sides and bottom of the camera have
places for connecting and inserting things,
such as cables, batteries, and memory cards.
Right side
On the camera's right side (lens facing you)
are the D90's output terminals. These are
used to connect your camera to a computer
or to an external source for viewing your
images directly from the camera.
These terminals are hidden under a plastic
cover that helps keep out dust and moisture:
DC in. This AC adapter input con-
nection allows you to plug the D90
into a standard electrical outlet by
using the Nikon EH-5 or EH-5a
AC-to-DC adapter. This allows you
to operate the camera without
draining your batteries. The AC
adapter is available separately from
Nikon.
USB port. This is where the USB
cable plugs in to attach the camera
to your computer to transfer or
print images straight from the cam-
era. The USB cable is also used to
connect the camera to the com-
puter when using Nikon's optional
Camera Control Pro 2 software.
HDMI out. The high-defi nition
video output terminal is used to
connect the camera to a high-
defi nition TV (HDTV). The camera is
connected with an optional Type C
mini-pin HDMI cable that can be
purchased at an electronics store.
21
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