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- Z: see Impedance.
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- Z-: see Zetta- (Z-).
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- z-: see Zepto- (z-).
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- Zener Diode: see Diode, Zener.
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- zepto- (z-)
- Measurement: SI / Metric unit of decimal measurement, equal to 10-21 or 0.000000000000000000001.
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- zetta- (Z-)
- Measurement: SI / Metric unit of decimal measurement, equal to 1021 or 1,000,000,000,000,000,000,000.
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- ZIF Socket
- Acronym: Zero Insertion Force Socket
- Electronics: An IC socket that uses a lever to apply or release contact with the chip leads, rather than requiring that the chip be pressed into the socket. This allows the IC to be put in the socket without requiring physical force against the chip.
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- Zinc
- Metal Detectors: A penny dated 1982 or after, so called because it is copper-clad zinc. Usually very pitted when dug out of the ground.
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- Zero Discrimination
- Metal Detectors: A type of detector with discrimination control which allows the acceptance of all metals at zero setting.
- ZLR
- Acronym: Zoom Lens Reflex
- Digital Video: A term used by Olympus to describe an SLR-type camera that has a non-removable lens rather than interchangeable lenses.
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- Zoom, Digital
- Digital Video: A digital magnification of the center 50% of an image. A digital zoom increases the apparent image size by interpolation; however, it does not increase the amount of image information. Compare to Zoom, Optical.
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- Zoom Lens
- Digital Video: A variable focal-length lens, used to magnify the target image. The most common zoom lens on digital cameras has a 3:1 ratio. The zoom function on digital cameras will be either an optical zoom or a digital zoom.
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- Zoom Lens Reflex: see ZLR.
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- Zoom, Optical
- Digital Video: A true, lens-based zoom lens that results in a larger image at the same resolution, with an increase in image information. An example of a simple optical zoom is the small handheld cameras that have a magnifier that slides in front of the main lens. Compare to Digital Zoom.
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