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a lens having a surface of stepped concentric circles, thinner and flatter than a conventional lens of equivalent focal length; used in viewfinders and as a condenser in studio spot lights
Fresneli lääts . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/Fresneli%20l%C3%A4%C3%A4ts/1/est (02.08.2026)