Nikon D2X User Manual page 202

Custom Setting b1: ISO Auto Control
If On is selected for this option, the cam era will au to mat i cal ly adjust sensitiv-
ity (ISO equiv a len cy) when necessary to help ensure optimal exposure. This
op tion is not available at sensitivities of HI-1 or HI-2.
Highlight b1 ISO auto in the second level of the
CSM menu ( 177) and press the multi selector
to the right. Press the multi selector up or down
to highlight an option, then press to the right to
make a selection.
Option
Off Sensitivity remains fi xed at value selected by user, regardless of whether
(default) optimal exposure can be achieved at current ex po sure settings.
If optimal exposure can not be achieved at sensitivity selected by user, sen-
si tiv i ty is adjusted to compensate, to min i mum ap prox i mate ly equiv a lent
to ISO 100 and max i mum ap prox i mate ly equiv a lent to ISO 800. Sensitiv-
On
ity can not be set to HI-1 or HI-2 while this option is in effect. Sensitivity
remains fi xed at value selected by user when fl ash is used.
When On is selected, the rear control-panel dis-
play shows ISO-AUTO and ISO-A appears in the
viewfi nder sidebar. These indicators fl ash when
sensitivity is altered from the value selected by the
user.
Bank Select
If a shooting menu bank in which ISO has been set to HI-1 or HI-2 is chosen after On
is selected for Custom Setting b1, sensitivity (ISO equivalency) will not be ad just ed
automatically. Sensitivity will also not be ad just ed automatically if a Custom Set tings
bank in which On is selected for Custom Setting b1 is chosen after ISO has been set
to HI-1 or HI-2.
High ISO NR (
Noise is more likely to appear in photographs taken at higher sensitivities. To reduce
noise at sensitivities of ISO 400 equivalent and above, turn on the High ISO NR option
in the shooting menu.
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Description