When interchangeable-lens DSLRs with STILLS only ExpSim LV (APS-C EOS 20Da, APS-H EOS 1DMkIII, Full Frame (FF) EOS 1DsMkIII), with its ExpSim LV having Full Manual / M/Auto-ISO mode and AE / M/Auto-ISO mode, ExpSim LV was extended for the first time in any interchangeable-lens DSLR to Canon's FF ExpSim LV (1080p) video in 5DMkIII, it was only then, did use of OVF shifted over, more to the rear lcd monitor to shoot Cinematic (larger FF sensor frame than pro digital Super35mm and 35mm Cine cameras).