16
Part I
Using the Nikon D90
Diopter adjustment control. Just
to the right of the viewfi nder is the
diopter adjustment control. Use
this control to adjust the viewfi nder
lens to suit your individual vision
diff erences (not everyone's eyesight
is the same). To adjust this, look
through the viewfi nder and then
rotate the diopter control until the
viewfi nder information is sharp.
You can also press the Shutter
Release button halfway to focus on
something. If what you see in the
viewfi nder isn't quite sharp, rotate
the diopter control up or down
until everything appears in focus.
AE-L/AF-L. The Autoexposure/
Autofocus Lock button is used to
lock the Autoexposure (AE) and
Autofocus (AF). You can also cus-
tomize the button to lock only the
AE or only the AF. It can also be set
to lock the exposure with a single
press and reset with a second press
(AE Lock (hold)). You can set the
button to initiate AF (AF-On) and to
lock the fl ash exposure value (FV
Lock). This can be set using CSM f4.
For more on customizing the AE-L/
AF-L button, see Chapter 3.
Main Command dial. This dial is
used to change a variety of settings
depending on which button you
press in conjunction with it. By
default, it's used to change the
shutter speed when in Shutter
Priority and Manual modes. It's also
used to adjust exposure compensa-
tion as well as change the Release,
AF, and Flash modes.
Setting the AE-L/AF-L button to AE
Lock (hold) when shooting video
allows you to lock the exposure so
that the video doesn't fl uctuate
between light and dark when fi lm-
ing in a setting with areas that have
high contrast between the highlights
and shadows, such as with spot-
lights at a performance or under
dappled sunlight.
Live View (Lv) button. Pressing
this button activates the Live View
function. Pressing the button a sec-
ond time disables Live View and
returns the camera to the standard
Shooting mode.
Multi-selector. The Multi-selector
also serves a few diff erent pur-
poses. In Playback mode, the Multi-
selector is used to scroll through
the photographs you've taken, and
it can also be used to view image
information, such as histograms
and shooting settings. When in cer-
tain Shooting modes, the Multi-
selector can be used to change the
active focus point when in Single
Point or Dynamic Area AF mode.
You also use the Multi-selector to
navigate the camera's menus.
OK button. When in Menu mode,
press this button to select the
menu item that's highlighted. When
Live View is activated, pressing this
button starts recording video by
using D-Movie mode.
For more on D-Movie mode, see
Chapter 7.
Focus selector lock. This switch
allows you to lock the selected
focus area so that it can't be acci-
dentally changed.
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