Editing 3D display (section)

====Transparency viewers====
{{Main|Slide viewer#Stereo slide viewer}}
[[File:View-Master Model E.JPG|thumb|A View-Master Model E of the 1950s]]
Pairs of stereo views printed on a transparent base are viewed by transmitted light. One advantage of transparency viewing is the opportunity for a wider, more realistic [[Dynamic range#Photography|dynamic range]] than is practical with prints on an opaque base; another is that a wider [[field of view]] may be presented since the images, being illuminated from the rear, may be placed much closer to the lenses.

The practice of viewing film-based stereoscopic transparencies dates to at least as early as 1931, when [[Tru-Vue]] began to market sets of stereo views on strips of [[35mm format|35 mm film]] that were fed through a hand-held [[Bakelite]] viewer. In 1939, a modified and miniaturized variation of this technology, employing cardboard disks containing seven pairs of small [[Kodachrome]] color film transparencies, was introduced as the [[View-Master]].