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objective lens

   Also found in: Medical, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
objective lens
n.
See objective.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.objective lens - the lens or system of lenses in a telescope or microscope that is nearest the object being viewedobjective lens - the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
compound microscope - light microscope that has two converging lens systems: the objective and the eyepiece
lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
optical telescope - an astronomical telescope designed to collect and record light from cosmic sources


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By rotating the nosepiece, you can select which objective lens to use.
The second number being 35 in this case is the diameter of the objective lens (the big one facing the object being looked at) in millimeters.
Later research into this effect revealed a surprising result, that is, the high reduction of the chromatic aberration of a single plano-convex objective lens by placing an achromatic doublet lens at some position along the focal length, and inside the prime focus itself.
 
 
 
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