Abstract: The improved stereoscopic print viewer provides a simple interoccular adjustment to permit maximum comfortable magnification. A new method of focusing and holding the prints gives minimum viewer size. A variable focus adjustment automatically locks in place. The method of holding the prints positions them in close optical alignment, and requires minimum size. Prints are provided with a notch mating with a boss in the print holder. Special print borders are provided for an improved stereoscopic "window".The lenses follow the optical system devised by Oliver Wendall Holmes, but fold compactly together when not in use, with each lens on a pivot with means to index it properly into a viewing position.Each lens can also be indexed further to provide a hand held magnifier with the power of one lens, or, by indexing the other lens to a matching position, twice the magnifying power is obtained.

Abstract: The improved camera has a film chamber separable and disposable from the exposure chamber of a camera, with a self contained means for processing material for a diffusion transfer-reversal photographic system, with the material comprising a film negative, a glass plate in a mount, a liquid with activating chemicals in either a pod or incorporated in the negative, and a positive emulsion, either coated on the glass or on a film attached to the glass adhesively during processing. When processed, a slide in a mount results in a minute or so.The improved camera, over my U.S. Pat. No. 3,045,572 of July 14, 1962 provides a larger image size within the constraints of proper interoccular spacing and lenses of a normal angle of view. The improved camera provides for a unique system of focusing, which automatically corrects the interoccular spacing of the stereo pairs when the distance is set.Provided is a unique shutter for controlling exposures in a stereoscopic camera.