The stereoscope and stereoscopic photography (1890)
Drouin, F. (Felix) · Bradford ; London : Percy Lund, The Country Press · leaf 54
rst to construct a stereoscope withground glass at one end, for the use of transparencies. AND STEREOSCOPIC PHOTOGRAPHY. 47 Fig. 32 represents a stereoscope with entirelenses. These are mounted in a double frame-work, movable by the aid of a screw or rack, sothat the instrument may be adapted to… … Fig. 32. adjustment of the lenses is not, however, withoutits use, for by varying their distance from thepicture, the refraction of the rays is also varied,so that generally a distance can be found at whichthe two pictures are superposed perfectly andwithout effort. We have frequently found thatin…
Stereoscope · Photography, Stereoscopic
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