Nikon D2Xs Manual page 68

Noise
The higher the ISO sensitivity, the more likely pictures are to be subject to "noise" in
the form of randomly-spaced, brightly-colored pixels. Pho tos taken at settings over
ISO 800 will likely con tain ap pre cia ble amounts of noise.
High ISO NR (
This option can be used to reduce noise at ISO sensitivities of ISO 400 or more (this
reduces the capacity of the memory buffer). Note that although noise reduction is
always in effect at ISO sensitivities over ISO 800, selecting On for High ISO NR will
increase the amount of noise reduction performed.
b1—ISO Auto (
When On is selected for Custom Setting b1 (ISO auto), the camera will automatically
vary ISO sensitivity from the value selected by the user to help ensure optimum expo-
sure. ISO sensitivity can not be set to values over ISO 800 while ISO auto is on, and On
can not be selected for ISO auto is when ISO is set to a value over ISO 800.
b2—ISO Step Value (
Depending on the option selected for Custom Setting b2, ISO sensitivity can also be set
in increments equivalent to ½ or 1 EV.
ISO step value set to 1/2 step
If possible, the current ISO sensitivity setting is maintained when the step value is
changed. If the current ISO sensitivity setting is not available at the new step value,
ISO sensitivity will be rounded up to the nearest available setting.
d5—Cntrl Panel / Finder > Rear Control Panel (
If Exposures remaining is selected for Cntrl panel / fi nder > Rear control panel
(Custom Setting d5), ISO sensitivity will only be displayed in the rear control panel
while the ISO button is pressed. If ISO sensitivity is selected, ISO sensitivity will be
displayed except during voice memo recording and playback.
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176)
191)
192)
ISO step value set to 1 step
199)