Stereoscope Viewer with Cards
Item 1: wooden stereoscope with glass eyepieces (lenses) and leather around the facepiece
Item 2: 20 x black and white photographic cards with images of the following countries (highlighting historic places):
1 x Ireland
4 x England
2 x Coney Island
13 x United States of America
A stereoscope is an optical device that presents two slightly different images (a stereo pair, like left and right eye views) through lenses, tricking the brain into perceiving a single, three-dimensional image, a phenomenon called stereoscopy. It was a popular Victorian entertainment device, the first mass-marketed form of virtual reality, and its principles are used in modern 3D movies, VR, and even scientific imaging. Two almost identical pictures were mounted on a stiff cardboard backing so that, when viewed through a stereoscope, a three-dimensional picture could be seen.
Details
Details
Item 1: (no markings)
Item 2: black text "American Series"
The stereoscope is essentially an instrument in which two photographs of the same object, taken from slightly different angles, are simultaneously presented, one to each eye. This recreates the way which in natural vision, each eye is seeing the object from a slightly different angle, since they are separated by several inches, which is what gives humans natural depth perception. Each picture is focused by a separate lens, and by showing each eye a photograph taken several inches apart from each other and focused on the same point, it recreates the natural effect of seeing things in three dimensions
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