File:The American annual of photography (1922) (14594893298).jpg

Identifier: americanannualof36newy (find matches)
Title: The American annual of photography
Year: 1922 (1920s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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ch in the right place or not.His single vision allows but for two dimensions—width andheight—but no depth or distance. So with photography, theordinary single-lens sort reduces everything to a single plane—the surface of the print—and the picture enables us to judgethe distance of objects therein only in the most general way,by their relative size, by convergence and divergence ofparallel lines, by lights and shadows, and by what is calledaerial perspective. Now stereoscopic methods supply photographs with thethird dimension, depth or distance. The two-lens camera seesthings as our two eyes do, and the finished stereographviewed through a stereoscope shows the scene as our eyeswould see it—every object at its proper distance and standingout with a roundness that is so realistic as to be positivelystartling when seen for the first time. The appearance isnot that of a picture on a plane surface, but is as if we wereactually looking at the scene itself, except for color. The 38
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CATHEDRAL ARCHES. RICHARD M. COIT. 39 Autochrome supplies color, so that the stereoscopic Auto-chrome is the nearest counterfeit to nature that we can getby photography and is as much more perfect than the singleblack and white print as—well, there is no comparison at all. Most people, and this includes many photographers, donot understand the stereoscopic principle. It depends on thefact that the left eye does not see exactly the same view thatthe right eye does, because the eyes are about two and a halfinches apart and to that extent each has a different viewpointfrom the other. This makes a considerable difference withobjects that are close at hand, and less and less difference asthe distance increases. Sight along the edge of a foot-ruleas you would along a gun-barrel—right eye open, left eyeclosed. Now, without changing the position of the rule, closethe right eye and open the left. See the difference? On theother hand, if youre looking at a church steeple a mile away,it look

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