the lens in an eyepiece that is farthest from the eye and that deviates rays toward the center of the eye lens.
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Origin of field lens
First recorded in 1830–40
Words nearby field lens
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for field lens
The object looked at requires to be a short distance in front of the field-lens.The New Gresham Encyclopedia|Various