Lummer, O. (Otto), 1860-1925, Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · London, New York, Macmillan and Co., 1900 · leaf 77
This use of two widely separated members involves, on the other hand, a limited field of view, with an illumination diminishing up to the margin of the field, whilst, in consequence of there being six air-glass surfaces, a great number of reflected images are formed, so that the brightness of the… … the conclusion that the image Fig. 14, — Steinlieil’s Antiplanet. is the more uniform in sharp- ness the more unequally the lohole qmformance of the ohjective is divided between its two members. Accordingly, both the members “ I and II possess aberrations of opposite kinds of intentionally large…
Photographic optics
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