Hind, H. Lloyd (Herbert Lloyd), Randles, W. Brough (William Brough) · New York : E. P. Dutton & co.; London, G. Routledge & sons, ltd. · leaf 165
or 1-4 and anyaplanatic aperture nearly or quite as large. Leitz oil-immersion condenser illustrated at Fig. 36 has a N.A. of 1-4, and by removal of one or more of the component lenses can be used as a medium- or low-power condenser as follows : — Working N.A. Focal length. distance. With top lens… … Fig. 37 SWIFT'S APOCHROMATIC CONDENSER make " Apochromatic," as, by the employment of fluorite in their construction, they claim to achieve the corrections corresponding to that term. The front lens should never be removed jfrom these as they are very
Photomicrography · Color photography
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