Zeiss Ikon Stereoscopic Viewer, Relief Photography Circa 1920

Trapezoidal shaped stereoscopic viewer in varnished wood with Zeiss Ikon lenses circa 1920The stereoscope is suitable for viewing stereoscopic glass plates measuring 6 X 12.5 cm. The lenses are in excellent condition and the high quality Zeiss Ikon optics allow for optimal viewing of the 3D image. On the opposite side of the lenses is a frosted glass plate to diffuse the light for viewing the glass plates, above it, a mirror to reflect the light for illuminating the cardboard plates. Relief photography is as old as "flat" photography (photography as it is widespread today). The invention of the relief image even predates that of photography, since in 1838, Wheatstone, a member of the Royal Society of London, invented a mirror device that restored the relief (as a reminder, the official date of the invention of photography is 1839). Furthermore, the principle of obtaining a relief image had already been established in Antiquity by Euclid and taken up by Leonardo da Vinci in 1484. Link to the site https://www.lavalisearlesienne.com/product-page/visionneuse-st%C3%A9r%C3%A9oscopique-zeiss-ikon