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zoom lens - 2 dictionary results

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.

Origin:
1935–40
zoom lens  
n.  A camera lens whose focal length can be rapidly changed, allowing rapid change in the size of an image.
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