Black's Photo Glossary
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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TELEPHOTO
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A lens with a very long focal length that magnifies and brings the subject being photographed closer. See also FOCAL LENGTH, ZOOM LENS.
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THUMBNAIL
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A miniature, low-resolution version of a digital image used for cataloguing and previewing purposes.
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TIFF
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Tagged Image File Format. A high quality lossless digital image format. Because files are not compressed, they take up a lot more space than JPEGs, but they are of much higher quality. See also JPEG, RAW.
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TIME LAPSE
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A series of photographs of the same subject taken from a fixed position at fixed intervals over a period of time. These images can then be presented as a series or can be superimposed. See also MUTLIPLE EXPOSURE.
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TRIPOD
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An adjustable, usually collapsible three-legged support used to steady a camera and reduce shake when taking pictures with prolonged exposure times or during low-light conditions. See also MONOPOD.
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TTL
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Through The Lens. Electronic metering feature that measures the amount of ambient and electronic light through the lens. It is used mostly to control flash timing and exposure.
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TWAIN
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Technology Without An Interesting Name. A protocol for retrieving image data from scanners, used to create drivers for scanners. See also FLATBED SCANNER, SCANNER.
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