At the heart of the EOS R3 , the DIGIC X image processor enables precise subject tracking and AF performance even in 6K 60p and 4K 120p recording . High frame rate movie recording in 4K UHD 120p allows for slow motion playback that delivers impact in every frame . When recording in 4K DCI 60p , the ability to oversample from data captured in 6K delivers stellar quality with smoother edges , less moiré and minimal colour distortion and noise . The EOS R3 ’ s readout speed of 4K 60p is approx . 1.6x faster than the EOS-1D X Mark III , making it more effective in suppressing rolling shutter distortion .