User guide
Glossary 526
white point The color temperature of a display, measured in kelvins. The higher the white point,
the bluer the white is; the lower the white point, the redder the white. The native white point for
a Mac computer is D50 (5000 kelvins); for a Windows PC, it is D65 (6500 kelvins). See also color
temperature, kelvin (K).
wide-angle lens A lens with a short focal length that takes in a wide view. The focal length of
a wide-angle lens is smaller than the lm plane or digital image sensor. See also digital image
sensor, lens.
working space The color space in which you edit a le. Working spaces are based either on color
space proles such as Apple RGB or on device proles.
XMP sidecar le An extensible markup language designed by Adobe Systems Incorporated that
is used for dening metadata sets for photo editing applications. Resources, such as adjustment
parameters, can be saved in this le and passed on to other applications. See also adjustment,
IPTC, IPTC Core, metadata.
zoom lens A lens that has the mechanical capacity to change its focal length; also known as an
optical zoom lens. See also lens.
Zoom Viewer button A button in the Viewer and the full-screen view toolbar that alternates the
display of the photo selection between tting the photos within the Viewer and presenting the
photos at 100 percent size. See also control bar, lmstrip, photo selection, Viewer.
67% resize factor