[…] all three cameras […] shot the same scene with the same lens (Canon 24-105 f/4) and settings (f/9, 1/50, ISO 100). We use a picture style with sharpness at 0, contrast at 0, and saturation at -2. We adjusted the focal length on the crop-sensor t4i to match that of the other two cameras. Obviously this isn’t completely scientific, but we did our best.
The outcome may surprise you. While the EOS 1D-X is obviously the best performing gear here, and the 5D Mark III is second placed, the performance of the Rebel T4i/650D is by far not so much worse as the others cost more (we’re talking about video modes here). See for yourself, and do it by enlarging the video to full screen (otherwise moire artifacts are hard to spot).
EOS 1D-X price check: DigitalRev | Redcoon.pl | eBay EOS 5D Mark III price check: DigitalRev | Redcoon.pl | eBay Rebel T4i/EOS 650D price check: DigitalRev | Redcoon.pl | eBay EF 24-105 f/4L price check: DigitalRev | Redcoon.pl | eBay