Dan Chung from dslrnewsshooter has had a chance to compare the Canon 5D mark III and its big brother the Canon 1D X. Both have very similar video features but there seems to be a slight difference how video is recorded.
When I used the 5D mark III for my NAB 2012 coverage I wrote that I was actually quite happy with the detail it provided after sharpening in post. But regardless of my personal opinion there’s a definite need for a sharper image among HDSLR’s and the 1DX seems to provide that.
There’s a lot of technical evaluation on nofilmschool and eos hd about Dan’s video and in a way everybody seems to be relieved that there’s improvement. But is the difference really that significant? You can go to vimeo and download Dan’s video for your own evaluation.
I downloaded the source and found a moment for both cameras when the Manfrotto logo on her shirt seemed best exposed. I applied some sharpening to the 5D mark III. It seems like indeed the 1DX has slightly more detail to show as the logo seems more readable on the 1DX footage.
[UPDATE] A more in depth analisys by cinema5D member jcs (see comments):
“5D3 image sharpened at 33 + minor curve adjust, 1DX sharpened at 16, both Neat Video noise reduced.
After processing, during playback and full screen, hard to see much of a difference in quality: the 1DX has slightly more detail, but looks digital vs. the slightly less detailed 5D3 which looks more like film.”