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field lens

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field lens

–noun Optics.
the lens in an eyepiece that is farthest from the eye and that deviates rays toward the center of the eye lens.

Origin:
1830–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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field lens  
n.  The lens positioned farthest from the eye in a compound eyepiece.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: field lens
Pronunciation: -"lenz
Function: noun
: the lens in a compound eyepiece that is nearer the objective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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