Somehow it came unexpectedly that now just Canon as the first of the big Japanese photo manufacturers brings a 
DSLR with internal RAW recording on the market. And the longer one deals with the specs of the camera, the more there are little things to discover that one would not have expected that Canon would release in a photo camera.
C-Log with unscropped, internal 10 Bit 4:2:2 recording is already remarkable for a Canon DSLR/DSLM, but 5.5K 12 Bit RAW with Dual Pixel Pixel AF up to 30p is even more unique with a full format sensor in a camera under 10.000 Euro. The whitepaper now gives more to discover:
The Canon EOS-1D X Mark III can even tender both formats separately in two slots. So 10 Bit Log + RAW. And also the exact format specifications can be found in the whitepaper. Especially 10 Bit 4:2:2 HEVC Intra (!!) in C-Log sounds exciting.
You can also read how the downsampling of the individual video formats was realized in particular.
Personally, we think that the 1D X Mark III will be the last DSLR model in this professional series, which is why Canon has unlocked a lot of future-oriented video features. Because these should still be more than up-to-date for most professional photographers with cinematic secondary intentions in a few years.
But the most exciting thing is that Canon will surely let these functions appear in other cameras. So there is still no corresponding model with the new EOS-R Mount. And an answer to Panasonic's S1H and Sony's A7S series. But probably Canon is still waiting to see what Sony will put into its long awaited A7SIII. Because Sony will now include the new video features of the EOS-1D X Mark III for this introduction. And that should again promise an exciting year 2020.
Translated with www.DeepL.com/Translator (free version)
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