Antique 43 x 107 mm Stereo Glasses Viewer. 1920s.

Antique 1920's Stereo Viewfinder in perfect condition. In wood, with the mechanics of the machine revised, in perfect conditions, ready to be used. Pressing the lever located on the right while observing through the viewer, the machine shows the user the different images in 3D as if it were a primitive slide machine. Vision for 43 x 107 mm glass. All the mechanics work very smoothly and smoothly. The stereoscope, understood as a device that presents a double image that blends in our brain as a single stereoscopic image, was invented by Sir Charles Wheatstone in 1840. It is a very simple device in essence, consisting of four small mirrors, placed in such a way as to deflect the images corresponding to each eye, placed side by side, which, when viewed mounted one on top of the other, give a stereoscopic or three-dimensional effect. The main advantage on the part of the viewers with this apparatus is that, as there is no glare reduction, the images can be presented in very high resolution and in full spectrum color. The images are presented directly to the eyes and thus to the visual center of the brain. A magnificent device that makes it possible to see images in 3D and thus to enjoy the past with different eyes.