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 164
CHAPTER VII LENSES 91. Pinhole Images. — It is not necessary to have a lense in order to take a picture on a sensitive plate. If the ordinary lens of a camera be replaced by a very fine hole, like that made by a very fine needle S … in a piece of tinfoil, there will be an image formed on the plate. The way in which it is formed is shown in Fig. 19. Light from one point in the field of view can get at only one point on the plate, so that the light forms an image, inverted and right left-handed, as in the case of the lens image.…
Photography
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![An illustration from Brief synopsis of the course of lectures in descriptive geometry; as arranged for the first year Faculty of Applied Science and Engineering, University of Toronto. [By] J. Roy Cockburn (1922)](https://img.insideoutlibrary.com/img/200/ia-fybriefsynopsiso00cockuoft-19-14.webp)
