▁had ▁not ▁only ▁the ▁voice ▁but ▁the ▁temper ament ▁to ▁understand ▁the ▁feel ▁of ▁the ▁film . ▁ ▁Production ▁of ▁the ▁finished ▁film ▁Because ▁the ▁foot age ▁for ▁the ▁film ▁origin ated ▁from ▁so ▁many ▁sources ▁– ▁ 7 0 mm , ▁ 3 5 mm , ▁ 1 6 mm , ▁video , ▁still s ▁– ▁it ▁was ▁necessary ▁to ▁sett le ▁on ▁a ▁format ▁very ▁early ▁in ▁production ▁that ▁would ▁accommod ate ▁all ▁these ▁sources ▁without ▁making ▁it ▁obvious ▁that ▁the ▁film ▁was ▁jump ing ▁from ▁one ▁source ▁to ▁another . ▁The ▁original ▁specific ations ▁for ▁the ▁film , ▁left ▁over ▁from ▁the ▁M GM ▁co - production ▁concept , ▁were ▁for ▁it ▁to ▁be ▁fil med ▁in ▁ 7 0 mm . ▁There ▁was ▁not ▁time ▁before ▁the ▁launch ▁to ▁re cons ider ▁this , ▁and ▁so ▁the ▁launch ▁cre ws ▁were ▁working ▁with ▁a ▁few ▁ 7 0 mm ▁cam eras ▁and ▁some ▁ 3 5 mm . ▁After ▁the ▁moon walk ▁K ame cke ▁went ▁to ▁the ▁people ▁at ▁NASA ▁and ▁explained ▁that ▁the ▁film ▁really ▁couldn ' t ▁be ▁done ▁in ▁ 7 0 mm ▁for ▁the ▁budget ▁allowed ▁because ▁of ▁the ▁cost ▁of ▁film ▁and ▁processing , ▁the ▁unw ield iness ▁of ▁the ▁equipment , ▁and ▁the ▁slow ness ▁of ▁the ▁l enses ▁which ▁would ▁require ▁more ▁light ing ▁and ▁thus ▁larger ▁cre ws . ▁It ▁was ▁decided ▁to ▁release ▁the ▁film ▁in ▁ 3 5 mm ▁in ▁the ▁traditional ▁ 4 : 3 ▁screen ▁ratio