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Definition of Parfocal
1. a. With the lower focal points all in the same plane; -- said of sets of eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope or telescope) with which they are used.
Definition of Parfocal
1. having lenses with the corresponding focal points in the same plane [adj]
Lexicographical Neighbors of Parfocal
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