62
Ref
er
enc
e
—Exposur
e
Exposure Mode
Exposure mode determines how the camera sets shutter speed and aperture
when adjusting exposure. Four modes are available: programmed auto (
P
), shut-
ter-priority auto (
S
), aperture-priority auto (
A
), and manual (
M
).
To preview the eff ects of aperture, press and hold the
depth-of-fi eld preview button. The lens will be stopped
down to the aperture value se
lect
ed by the cam
era
(modes
P
and
S
) or the val ue cho sen by the user (modes
A
and
M
), al low ing depth of fi eld to be previewed in the
viewfi nder (the built-in fl ash and optional SB-800, SB-600,
and SB-R200 Speedlights will emit a modeling fl ash).
Depth-of-Field Preview
CPU Lenses
When using a CPU lens equipped with an aperture ring, lock the aperture ring at the min-
i mum aperture (highest f/-number). At other settings, the shutter release will be dis abled
and a blinking
will appear in the aperture displays in the control panel and viewfi nder.
Type G lenses are not equipped with an aperture ring.
b1—ISO Auto (
152)
When Custom Setting b1 (
ISO Auto
) is on, the camera automatically varies ISO sensitivity
between ISO 100 and a maximum selected by the user to help ensure optimum ex po sure
and fl ash level. In exposure modes
P
and
A
, the camera adjusts ISO sensitivity when the
shutter speed needed to obtain optimum exposure would be faster than / s or slower
than a specifi ed value. Otherwise the camera adjusts ISO sensitivity when the limits of the
camera exposure metering system are exceeded (mode
S
) or when optimum exposure can
not be achieved at the shutter-speed and aperture selected by the user (mode
M
).
e4—Modeling Flash (
166)
If
Off
is selected for Custom Setting e4 (
Modeling Flash
), the built-in fl ash and optional
SB-800, SB-600, and SB-R200 Nikon Speedlights will not emit a modeling fl ash when the
depth-of-fi eld preview button is pressed.
