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stereoscopic photographs
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
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Stereographs
Stereograms
Stereoviews
Stereo photographs
Stereograms
Stereograph
Card stereographs
Stereo cards
Stereocards
Refers to the most popular and common form of stereoscopic photographs, which are double photographs of the same image taken from two slightly different perspectives. Stereographs are distinctive among other stereoscopic photographs because they are photographic prints mounted on cards, while other types could be daguerreotypes, negatives, or unmounted prints. From 1856 they were produced with twin-lens cameras, creating a three dimensional effect when viewed through a stereoscope. Stereographs were especially popular during the Victorian period.
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tissue stereographs
tissue stereographs
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parallax stereograms
parallax stereographs
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anaglyphs
anaglyph
Stereoscopic photographs in which the two images are in contrasting colors and produce a three-dimensional effect when viewed through colored filters.
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half stereographs
half stereograph
stereographs, half
half stereos
one-half stereographs
Photographs originally taken as one of a pair of stereoscopic photographs but then printed or mounted as a single image.
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