anamorphic-lens

anamorphic lens

noun Movies, Optics.
1.
a compound lens or system of lenses that compresses the camera image in the horizontal direction during filming, so that a wide-screen image can fit on the width of conventional 35-mm film.
2.
a similar system used in projection that horizontally expands the compressed image back to its original wide-screen aspect ratio.

Origin:
1950–55

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
anamorphic lens
 
n
a component in the optical system of a film projector for converting standard 35mm film images into wide-screen format

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