<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">focusing backs</topic></authority><related type="broader"><topic>camera accessories</topic></related><variant type="other"><topic>focusing back</topic></variant> <note xml:lang="en"><![CDATA[ Removable or fixed camera backs that incorporate a ground glass (or plastic) screen on which an image projected from a lens is brought into focus. This is then removed, or a film holder is inserted in front of this to make an exposure. ]]></note></mads>