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 171
Fig. 2T. Pinhole image. Taken through a pinhole about ^ mm diameter on a plate 5 inches away by an exposure of l minute. Reproduced the same size. See Art. 91. … Fig. 28. The three photographs are of a book set on a slight slope. In 28 the focal length of the lens was 5 inches and the center of the liook was 15 inches from the lens.
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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