Canon EOS 10D - Manual (Page 160)

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Basic Terminology
AE
Abbreviation for auto exposure. It is an automatic metering and exposure system that sets the
optimum exposure (shutter speed and/or aperture) based on the reading by the built-in
exposure meter.
AF
Abbreviation for auto focus. It enables the camera to focus the subject automatically.
CF (CompactFlash) card
CF card is the small, card-shaped storage media used to record images taken by the EOS
10D.
ISO speed
This indicates the film’s sensitivity to light. It is expressed as a number following “ISO” such as
“ISO 100.” The higher the number, the higher the sensitivity to light. Digital cameras also use
the same ISO speed standard used by film-based cameras.
JPEG
Abbreviation for Joint Photographic Experts Group. It is an image file format with various
compression levels. The higher the compression rate, the lower the image quality, when the file
is expanded (restored).
RAW
This is an image file format that saves the image as is when captured by the camera. It is
geared for image processing with a personal computer.
The image quality is not affected when the raw image is compressed, saved, or decom-
pressed. By using the dedicated software for image processing, the image can be optimally
enhanced for the specified purpose.
sRGB
Color matching standard jointly developed by Microsoft and Hewlett-Packard. Cameras,
monitors, applications, and printers which comply with this standard are able to reproduce
colors in the same way. (The “s” stands for standard.)
Red-eye Effect
In a relatively dark room, where subjects’ pupils are dilated, the light from a camera flash
passes through the pupil, is reflected by the retina, and causes the subjects’ pupils to appear
red. Red-eye is particularly prevalent when the flash is close to the optical axis of the lens. Use
the following procedure to minimize red-eye:
1 Shoot with the Red-eye reduction function turned on. (The red-eye reduction lamp lights
before the image is taken, causing the pupils to contract and thus minimizing red-eye.)
2 Shoot with an EX-series Speedlite. (The light reflected from the pupil will not be directed
along the optical axis of the lens, thus minimizing red-eye.)
3 Shoot from as close as possible (same effect as 2).