Nikon D3X User Manual page 210

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Color Space
Color spaces define the correspondence between colors and the numeric
values that represent them in a digital image file. The sRGB color space is
widely used, while the Adobe RGB color space is typically used in
publishing and commercial printing. sRGB is recommended when taking
photographs that will be printed without modification or viewed in
applications that do not support color management, or when taking
photographs that will be printed with ExifPrint, the direct printing option
on some household printers, or kiosk printing or other commercial print
services. Adobe RGB photographs can also be printed using these
options, but colors will not be as vivid.
JPEG photographs taken in the Adobe RGB color space are Exif 2.21 and
DCF 2.0 compliant; applications and printers that support Exif 2.21 and
DCF 2.0 will select the correct color space automatically. If the application
or device does not support Exif 2.21 and DCF 2.0, select the appropriate
color space manually. An ICC color profile is embedded in TIFF
photographs taken in the Adobe RGB color space, allowing applications
that support color management to automatically select the correct color
space. For more information, see the documentation provided with the
application or device.
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Nikon Software
The following Nikon software automatically selects the correct color space
when opening photographs created with the D3X: ViewNX (supplied) and
Capture NX 2 (available separately).
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