Operation Manual

viewfinder The part of the camera designed to preview the area of the scene that will
be captured by the digital image sensor. See also camera, digital image sensor.
Vignette adjustment An adjustment in Aperture designed to add a vignette effect to an
image. See also Devignette adjustment, vignetting.
vignetting a. Darkening, also known as falloff, at the corners of the image as a result of
too many filters attached to the lens, a large lens hood, or poor lens design. b. The process
of applying a vignette to an image for artistic effect. See also Devignette adjustment,
filters, lens, Vignette adjustment.
watermark A visible graphic or text overlay applied to an image to indicate that the
image is protected by a copyright. Watermarks are used to discourage the use of images
without the copyright holder’s explicit permission.
waypoint A coordinate saved in a GPS track log representing a specific geographic
location. In Aperture, waypoints can be assigned to images in Places view. See also GPS
track log, Places view.
White Balance adjustment An adjustment in Aperture that changes the color temperature
and tint of a digital image. The goal of adjusting an image’s white balance is to neutralize
color casts in an image. For example, if the white in an image is too yellow because of
incandescent lighting, white balancing adds enough blue to make the white appear
neutral. See also color cast, color temperature, kelvin (K).
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 film plane or digital image sensor. See also
digital image sensor, lens.
working space The color space in which you edit a file. Working spaces are based either
on color space profiles such as Apple RGB or on device profiles.
XMP sidecar file An extensible markup language designed by Adobe Systems Incorporated
that is used for defining metadata sets for photo editing applications. Resources, such as
adjustment parameters, can be saved in this file 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.
906 Glossary