Nigellbb speaks the truth.
The C100 will take the 5dIII to the cleaners for video, especially docu work.
Yeah, but it's not because of the codec. Unbelievable that people can't realise that the reason the 5d mark III has a soft image is not because of the codec.
You take that All-i codec and snap it on to the C100 and you have a better codec than the AVCHD variant.