Lummer, O. (Otto), 1860-1925, Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · London, New York, Macmillan and Co., 1900 · leaf 97
DOUBLE-OBJECTIVES 81 XI refraction than the outer. The details of construction were published in the British Journal of Photography, 1896, p. 489. Double-objective Type hTo. 5 This double -objective is represented by the convertible … Vila., what was previously said of the Fio.26.-Zeiss's.r«f«/,>,a( convertible anastigmats of Series Via. Series Vila, (convert- applies directly to this case also — viz. that excellent anastigmats can be made by combining various simple objectives of Series VII. ; on account of which they liave…
Photographic optics
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