5 0 th ▁Academy ▁Awards , ▁Gar rett ▁Brown ▁and ▁the ▁Cinema ▁Product s ▁Corporation ▁Engineering ▁Staff ▁under ▁the ▁super vision ▁of ▁John ▁J urg ens ▁received ▁a ▁Scient ific ▁or ▁Techn ical ▁Award , ▁Class ▁I ▁for ▁the ▁in vention ▁and ▁development ▁of ▁the ▁Ste adic am . ▁ ▁Product s ▁ ▁X R 3 5 ▁In ▁motion ▁picture ▁equipment , ▁the ▁Mitchell ▁B NC ▁conversion ▁to ▁ref lex ▁was ▁followed ▁by ▁the ▁studio ▁quiet ▁X R 3 5 . ▁The ▁Cinema ▁Product s ▁X R 3 5 ▁had ▁a ▁Mitchell ▁NC ▁camera ▁inside ▁a ▁light weight ▁housing ▁or ▁bl imp . ▁The ▁bl imp ▁was ▁so ▁close ▁in ▁size ▁to ▁the ▁original ▁camera , ▁it ▁looked ▁small ▁compared ▁to ▁the ▁bl im ps ▁made ▁for ▁Mitchell ▁or ▁Ar rif lex ▁cam eras . ▁The ▁X R 3 5 ▁was ▁a ▁cry stal - control led ▁ 3 5 mm ▁motion ▁picture ▁camera ▁consider ably ▁l ighter ▁than ▁the ▁Hollywood ▁studio – owned ▁bl imp ed ▁Mitch ells . ▁The ▁X ▁stood ▁for ▁cry stal , ▁the ▁R ▁for ▁ref lex . ▁The ▁ref lex ▁system ▁was ▁based ▁on ▁a ▁spin ning ▁mirror ▁sh utter . ▁During ▁the ▁mirror s ' ▁revolution ▁at ▁one ▁point ▁the ▁film ▁would ▁be ▁exposed , ▁then ▁the ▁operator ▁would ▁view ▁the ▁image ▁in ▁the ▁mirror ▁as ▁the ▁film ▁was ▁advanced ▁to ▁the ▁next ▁frame , ▁at ▁ 2 4 ▁times ▁a ▁second . ▁Cinema ▁Product s ▁did ▁their ▁best ▁to ▁buy ▁up ▁all ▁available ▁ 3