Lummer, O. (Otto), 1860-1925, Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · London, New York, Macmillan and Co., 1900 · leaf 95
s. — The triple anastigmat of the firm Carl Zeiss, mentioned on pp. 64 and 65, admits, with great advantage, of being duplicated to form a symmetrical objective. The convertible anastigmat (or “ Satz-anastigmat ”), constructed of two three-lens components of equal focal length, is expressly within… … ponents of Fig. 23 might each be used 23.— Zeiss’s Anastiy- . , p , mat. Series Via. (or Con- separately for landscape or group purposes, vertihu Anastigmat). thus affording in one lens three different possibilities. Because these combinations are possible, the name Satz- anastigmats, meaning…
Photographic optics
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