n the wheel. An ocular■micrometer like this is in general like thecob web micrometer and may be used for■measuring objects of varying sizes very accu-rately. With the ordinary ocular microme-ter very small objects frequently fill but a partof an interval of the micrometer, but with thisthe movable… … DESIGNATION OF OCULARS. \ 40. Equivalent Focus.—As with objectives, so.ne opticians designate the ocu-lars by their equivalent focus (\ 13). With this nietlio 1 the power of the ocular,a-> With objectives, ocher lenses or lens systems, varies inversely as the equivalentfocal length, and…
Microscopy
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