FujiFilm FinePix E550 manual Digital Photography Glossary, Ccd, Cd-Rw, Cmos

Digital Photography Glossary

Published: May 1, 2002 Content Pasted from http://www.microsoft.com/windowsxp/using/digitalphotography/glossary/default.mspx

Struggling with a word or phrase? You're not alone. Photography has long had its own language, and digital photography adds many new terms. This glossary defines commonly used words and phrases in digital photography.

Ambient light The natural light in a scene.

Archival	The ability of a material, including some printing papers and
	compact discs, to last for many years.
Aperture	A small, circular opening inside the lens that can change in
	diameter to control the amount of light reaching the camera's
	sensor as a picture is taken. The aperture diameter is expressed
	in f-stops; the lower the number, the larger the aperture. For
	instance, the aperture opening when set to f/2.8 is larger than at
	f/8. The aperture and shutter speed together control the total
	amount of light reaching the sensor. A larger aperture passes
	more light through to the sensor. Many cameras have an aperture
	priority mode that allows you to adjust the aperture to your own
	liking. See also shutter speed.
Application	A computer program, such as an image editor or image browser.
Buffer	Memory in the camera that stores digital photos before they are
	written to the memory card.
Burning	Selectively darkening part of a photo with an image editing
	program.
CCD	Charge Coupled Device: one of the two main types of image
	sensors used in digital cameras. When a picture is taken, the CCD
	is struck by light coming through the camera's lens. Each of the
	thousands or millions of tiny pixels that make up the CCD convert
	this light into electrons. The number of electrons, usually
	described as the pixel's accumulated charge, is measured, then
	converted to a digital value. This last step occurs outside the CCD,
	in a camera component called an analog-to-digital converter.
CD-R	CD-Recordable: a compact disc that holds either 650 or 700 MB of
	digital information, including digital photos. Creating one is
	commonly referred to as burning a CD. A CD-R disc can only be
	written to once, and is an ideal storage medium for original digital
	photos.
CD-RW	CD-Rewritable: similar in virtually all respects to a CD-R, except
	that a CD-RW disc can be written and erased many times. This
	makes them best suited to many backup tasks, but not for long
	term storage of original digital photos.
CMOS	Complementary Metal-Oxide Semiconductor: one of the two main
	types of image sensors used in digital cameras. Its basic function
	is the same as that of a CCD. CMOS sensors are currently found in
	only a handful of digital cameras.

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