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Taking Photographs—Exposure
Exposure Mode
Exposure mode determines how the camera sets shutter speed and aperture
when adjusting exposure. Four modes are available: programmed auto (P),
shutter-priority auto (S), aperture-priority auto (A), and manual (M).
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 top control panel
and viewfi nder. Type G lenses are not equipped with an aperture ring.
Depth-of-Field Preview
To preview the effects 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 (if an optional SB-
800 or SB-600 Speedlight is attached, a modeling fl ash will be emitted).
b1—ISO Auto ( 188)
When On is selected for Custom Setting b1 (ISO auto), the camera automatically
varies sensitivity in the range 100–800 (ISO equivalent) to help ensure optimum ex po -
sure when the limits of the camera exposure me ter ing sys tem are exceeded (exposure
modes P, S, and A) or optimum exposure can not be achieved at the shutter-speed and
aperture selected by the user (exposure mode M). When sen si tiv i ty is al tered from the
value se lect ed by the user, ISO-AUTO will fl ash in the rear control panel and a fl ashing
ISO-A will be displayed in the viewfi nder. In the camera photo information display for
pictures taken at altered sensitivities, the ISO value will also be displayed in red. Note
that noise is more likely to ap pear in pho to graphs taken at higher sen si tiv i ties.
On can not be selected for ISO auto when sensitivity is set to HI-1 or HI-2; sim i lar ly,
HI-1 or HI-2 can not be se lect ed when ISO auto is on. If a fl ash is used when ISO
auto is on, ISO will be fi xed at the value selected by the user. If ISO auto is on when
autoexposure bracketing is selected in exposure mode M, sensitivity will vary around
the value selected by the user as required by the bracketing program.
b7—Fine-Tune Exposure ( 191)
Optimal exposure can be fi ne-tuned separately for each metering method (note that
the exposure compensation icon is not displayed when exposure is fi ne-tuned).
e4—Modeling Flash ( 199)
If Off is selected for Custom Setting e4 (Modeling fl ash), the optional SB-800 and SB-
600 will not emit a modeling fl ash when the depth-of-fi eld preview button is pressed.