The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual (1920)
Roebuck, John R. (John Ransom), 1876-1965 · New York ; London : D. Appleton and company · leaf 184
PHOTOGRAPHY 156 are focused m the two lenses, are placed side by side, see Fig. 34, it will be immediately apparent that if any two of these color foci are made to … match, as for example in the violet and red in the figure, then the others will not match exactly but only approximately. Lenses can be made easily so that the dispersion of any pair of colors will be Flint i 1 i 1 i i 1 1 Crown BC D E F G Red Orange 'i^ilow Greei> Blue ^Indigo Violet Fig. 34.…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
