I love the video produced by my 5D Mark III. I use the 24-105mm f/4 L lens and in Premier Pro CS6 add 28-35 sharpening. In low light, even with that lens, the footage looks fab. No complaints from me.
although i use my 5d3 in manual 90 percent of the time i do also see a quality difference, but do you guys think the problem is that the 5d3 processes at 4:2:0, until April (a weeks time) output at 4:2:2 will finally be available, but then we all need a ninja or other brand capture device via HDMi.
ive been testing my 5d3 to see whether i can pull of video and photos that look close enough to not tell the difference but i find its the lighting and i never get the same results with the same exact settings, it seems i have to tweek a custom setting for video and then switch to it from my typical manual or AV mode for photo rather then just go into live mode for video on the 5d3, you guys run into the same thing?