aspherical

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a·spher·ic

 (ā-sfîr′ĭk, ā-sfĕr′-) also a·spher·i·cal (-ĭ-kəl)
adj.
Varying slightly from sphericity and having only slight aberration, as a lens.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

a•spher•i•cal

(eɪˈsfɛr ɪ kəl, eɪˈsfɪər-)

also a•spher′ic,



adj.
(of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations.
[1920–25]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aspherical - varying slightly from a perfectly spherical shape
aspheric
optics - the branch of physics that studies the physical properties of light
rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive
The camera measures an impressive 3.7 (W) x 2.5 (H) x 1.2 (D) inches and is equipped with a 26-52mm f/4.2-6.7 (equivalent to 32.5-65mm with 35mm-format cameras) 2x aspherical zoom lens composed of six lenses in six groups.
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Aspherical optics provide a fast f 1.3 maximum iris aperture for excellent low-light performance.
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With zoom lenses incorporating one or more aspherical lens elements, however, this distortion is well corrected due to the compensating effect of the aspherical lens.
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The design includes two ED (extra lowA[degrees]dispersion) elements and one doubleA[degrees] sided aspherical element, plus four elements with a convex surface facing the subject, which combine to reduce spherical and chroA[degrees]matic aberrations.
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The XC16-50mm lens consists of 12 all-glass elements in 10 groups including 3 aspherical elements and 1 ED element.
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A redesigned optical path includes an increased number of elements and two aspherical lenses for fast, accurate performance, whilst Canon's acclaimed Optical Image Stabilizer (OIS) technology provides distortion-free images throughout the range of the 10x optical zoom.
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The Coolpix A's lens has 7 elements arranged in 5 groups with one aspherical element included.
Nikon announces Coolpix A point and shoot camera with APS-C sensor
Your eyes may or may not appreciate the difference of an aspherical lens, and you may not want a 44mm objective.
ERNIE SIMMONS WOULD BE PROUD
The lens unit consists of 7 elements in 6 groups with 3 aspherical lenses with 5 aspherical surfaces.
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