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 189
Fig. 37. Pin Cushion Distortion. Taken with the front component of a fine doublet lens with the diaphragm behind it. … Fig. 37a. Barrel Distortion. Taken from the same place and with the same component as Fig. 37 but with the dia- phragm in front of tiie lens and the lens turned around. Beside the curvature of what are straight lines in the object, note the difference in size of the two pictures. The black line…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
