Wilson's quarter century in photography : a collection of hints on practical photography which form a complete text-book of the art (1887)
Wilson, Edward L. (Edward Livingston), 1838-1903 · New York : E.L. Wilson · leaf 56
ar of the same size. This should be the case, for they were taken from the same point, and each representation, if truthful, should subtend the same angle, provided the eye is in correct position. To secure lenses as perfectly correct as possible is the aim of the buyer. rays, but the longitudinal… … use of a diaphragm at the proper place, the spherical aberration for oblique rays can be reduced to a small amount.
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
