An introduction to the science & practice of photography (1895)
Jones, Henry Chapman, 1854- · London, Iliffe, Sons & Sturmey Ltd · leaf 154
m mist in the air, etc.) There is a distortion always present when an image is produced by a lens or a pinhole upon a flat surface, because the surface is flat. Considering the picture as bounded by a circle, this distortion is an abnormal increase in size in the direction of radii of the circle,… … Fig. 47. girth will be represented as if those whose images are pro- duced on the edge of the plate were stouter than those near the middle. Fig. 48 shows this effect, and at once makes clear the reason of it. If a statue is reproduced at the edge of the plate it will appear stouter in proportion…
Photography
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