<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31371293</termId><termName>stereoscopic photography</termName><termType>PT</termType><termNote><![CDATA[ Refers to techniques used to produce the appearance of three-dimensionality in photographs by using two images made at slightly different positions, mounting them side by side, and viewing the pair through a stereoscope or other device. This type of photography was extremely popular in the Victorian period. The process was described in 1832, but the techniques were perfected only after 1856, when a twin-lens camera was designed to take two pictures of the same scene simultaneously. The viewpoints of the photographs were 2 1/2 inches apart, which is approximately the normal distance between human eyes. ]]></termNote><termCreatedDate>2026-03-30 20:40:08</termCreatedDate><relation><relationType>UF</relationType><termId>31371294</termId><termName>photography, stereoscopic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31371295</termId><termName>stereography</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31371296</termId><termName>stereophotography</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31340553</termId><termName>picture-taking techniques</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31371300</termId><termName>stereoscopy</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31431727</termId><termName>stereoscopic photographs</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31461580</termId><termName>stereoscopic cameras</termName><termType>PT</termType></relation></term>  </Zthes>