Mees, C. E. Kenneth (Charles Edward Kenneth), 1882-1960, Eastman Kodak Company · Rochester, N.Y. : Eastman Kodak Company · leaf 23
CHAPTER III. ABOUT LENSES. IN order to take a photograph we use a lens which forms an image of the object we want to photograph upon the film. The simplest lens which we could use would be a small hole. Suppose that we take a sheet of cardboard and make a hole in it with a pin, and then, in a… … If we take the lens out of a Fig. 11. How an Image is Produced. camera and replace it by a thin piece of metal pierced with a hole made by a needle (a No. 10 sewing needle is about right, and the edges of the hole must be beveled off so that they are sharp), then we can take excellent photo- graphs…
Photography
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