<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">stereoscopic photographs</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31431727</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:56:28</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">photographs, stereoscopic</dcterms:alternative> <dcterms:alternative xml:lang="en">stereo pairs</dcterms:alternative> <dcterms:alternative xml:lang="en">stereo photographs</dcterms:alternative> <dcterms:alternative xml:lang="en">stereo views</dcterms:alternative> <dcterms:alternative xml:lang="en">stereograms</dcterms:alternative> <dcterms:alternative xml:lang="en">stereophotographs</dcterms:alternative> <dcterms:alternative xml:lang="en">stereos</dcterms:alternative> <dcterms:alternative xml:lang="en">stereoscopic photograph</dcterms:alternative> <dcterms:alternative xml:lang="en">stereoview</dcterms:alternative> <dcterms:alternative xml:lang="en">stereoviews</dcterms:alternative> <dcterms:alternative xml:lang="en">sterescopic views</dcterms:alternative> <dcterms:alternative xml:lang="en">views, stereo</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Refers to double pictures of the same scene that produce the effect of three dimensionality when viewed through a stereoscope. They were first envisioned in 1832 by the English physicist Charles Wheatstone, who described this as a uniquely photographic art form, since a draftsman could not draw two scenes in exact perspective from viewpoints separated only 2 1/2 inches, which is the normal distance between human eyes necessary for the three-dimensional effect. Wheatstone's mirror stereoscope was not practical for use with photographs, and the invention was not popular until the 1850s, when Sir David Brewster, a Scottish scientist, designed a simpler viewing instrument. The introduction of the collodion process, which simplified exposure and printing techniques, allowed three-dimensional photographs to become a popular craze. They may be daguerreotypes, negatives, or other forms of photographs. For images in the form of photographic prints on cards, use the more specific term "stereographs." ]]></dc:description></metadata>