zoom lens

zoom lens

 
noun
(in a camera or motion-picture projector) a lens assembly whose focal length can be continuously adjusted to provide various degrees of magnification without any loss of focus, thus combining the features of wide-angle, normal, and telephoto lenses.
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Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Zoom lens is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a gadget; dingus; thingumbob.
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Collins
World English Dictionary
zoom lens
 
—n
See also telephoto lens a lens system that allows the focal length of a camera lens to be varied continuously without altering the sharpness of the image

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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