Operation Manual

polarizing filter A filter placed on the front of the camera lens that selectively transmits
light traveling on one plane while absorbing light traveling on other planes. Polarizing
filters are capable of reducing unwanted reflections on windows and shiny surfaces.
Polarizing filters are also used to darken the sky. See also filters.
positive Developed film where the tonal relationship of the subject or scene is the same
on film as when viewed by the eye; also known as a slide. See also dust and scratch
removal, emulsion, negative.
presets A saved group of settings, such as export, naming, print, and web export settings.
Presets determine properties such as file format, file compression, filename construction,
paper size, and ColorSync profile. Presets are usually defined for particular workflows and
can be tailored to client specifications. See also ColorSync.
pressure-sensitive tablet An input device used in place of a mouse that consists of two
parts: a flat surface for drawing (the interface that is connected to the computer) and a
pen or stylus. The harder you press the stylus against the surface of the tablet, the thicker
the line or brush stroke is. See also Brush HUD, Quick Brushes.
preview images JPEG images generated by Aperture that represent the original master
with any applied adjustments and associated metadata. Preview images are designed to
be shared with other applications, such as iWork and iLife applications, and used in place
of the masters when they are offline. See also adjustment, JPEG, metadata, offline.
primary selection The most important image in an image selection. Adjustments are
applied only to the primary selection in an image selection. The primary selection is
identified by a thicker white border. There can be only one primary selection in an image
selection. See also adjustment, image selection, Primary setting.
Primary setting A Viewer setting in Aperture that limits metadata changes to only the
primary selection in a multiple-image selection. See also filmstrip, image selection,
metadata, primary selection.
prime lens A lens with a fixed focal length that cannot be changed.
print An image printed on paper; also known as a photograph. See also dye sublimation,
inkjet printer, N-up printing, RA-4.
profile A compilation of data on a specific device’s color information, including its gamut,
color space, and modes of operation. A profile represents a device’s color-reproduction
capabilities and is essential to effective color management. See also device characterization,
gamut.
program exposure An exposure mode on many automatic cameras in which the camera
automatically sets the aperture and shutter values for a correct exposure. See also
exposure.
897Glossary