Nikon 25414 D2Xs User's Manual - Page 101

CPU Lenses, Depth-of-Field Preview, b1-ISO Auto, ISO-A, b7-Fine-Tune Exposure, e4-Modeling Flash

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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 minimum aperture (highest f/-number). At other settings, the shutter release will be disabled and a blinking will appear in the aperture displays in the top control panel and viewfinder. 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-field preview button. The lens will be stopped down to the aperture value selected by the camera (modes P and S) or the value chosen by the user (modes A and M), allowing depth of field to be previewed in the viewfinder. b1-ISO Auto ( 191) When Custom Setting b1 (ISO auto) is on, the camera automatically varies ISO sensitivity between ISO 100 equivalent and a maximum selected by the user to help ensure optimum exposure. 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 18,000 or slower than a specified 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). When ISO sensitivity is altered from the value selected by the user, ISO-AUTO will flash in the rear control panel and a flashing ISO-A will be displayed in the viewfinder. Note that noise is more likely to appear in photographs taken at higher ISO sensitivities. On can not be selected for ISO auto when ISO sensitivity is set to a value over ISO 800; similarly, values over ISO 800 can not be selected when ISO auto is on. b7-Fine-Tune Exposure ( 194) Optimal exposure can be fine-tuned separately for each metering method (note that the exposure compensation icon is not displayed when exposure is fine-tuned). e4-Modeling Flash ( 202) This setting controls whether the SB-800, SB-600, and other optional flash units that support the Creative Lighting System (CLS; 108) will emit a modeling flash when the depth-of-field preview button is pressed. 87

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87
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
minimum aperture (highest f/-number).
At other settings, the shutter release will be
disabled and a blinking
will appear in the aperture displays in the top control panel
and viewfinder.
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-field preview button.
The lens will be stopped
down to the aperture value selected by the camera
(modes
P
and
S
) or the value chosen by the user (modes
A
and
M
), allowing depth of
field to be previewed in the viewfinder.
b1—ISO Auto (
191)
When Custom Setting b1 (
ISO auto
) is on, the camera automatically varies ISO sensi-
tivity between ISO 100 equivalent and a maximum selected by the user to help ensure
optimum exposure.
In exposure modes
P
and
A
, the camera adjusts ISO sensitivity
when the shutter speed needed to obtain optimum exposure would be faster than
1
/
8,000
s or slower than a specified value.
Otherwise the camera adjusts ISO sensitiv-
ity 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
).
When ISO sensitivity is altered from the value selected
by the user,
ISO-AUTO
will flash in the rear control panel and a flashing
ISO-A
will be
displayed in the viewfinder.
Note that noise is more likely to appear in photographs
taken at higher ISO sensitivities.
On
can not be selected for
ISO auto
when ISO sensitivity is set to a value over ISO 800;
similarly, values over ISO 800 can not be selected when
ISO auto
is on.
b7—Fine-Tune Exposure (
194)
Optimal exposure can be fine-tuned separately for each metering method (note that
the exposure compensation icon is not displayed when exposure is fine-tuned).
e4—Modeling Flash (
202)
This setting controls whether the SB-800, SB-600, and other optional flash units that
support the Creative Lighting System (CLS;
108) will emit a modeling flash when the
depth-of-field preview button is pressed.