I post too Much on Here!!
- Jan 29, 2011
The R6 4K isn't DCI, it it 3,840 not 4,096. I can’t imagine the R3 will not be DCI standard 4K.24mp is not in any way a limitation on 4k video quality. The Sony A7 III has sharp, detailed 4k output and its sensor is exactly 6,000 x 4,000 pixels. The difference between that camera and older Canon 24mp bodies lies in the fact that the A7 III reads out the entire sensor then scales it to 4k (oversampling). The Canon bodies typically read out a crop and often have to scale up to 4k. Canon typically isn't even reading out a 1:1 4k center!
The EOS M using Magic Lantern can generate sharp 2.5k which scales nicely to 4k because it's reading 1:1. It's a severe crop, but it works. Likewise the 5D mark III can produce gorgeous 3.5k using Magic Lantern with a Super35 crop because, again, it's a 1:1 read. You want to oversample or read out 1:1. 4k gets mushy when you pixel bin, line skip, etc. due to performance limitations at the sensor or CPU. On a lot of bodies Canon got stuck doing exactly that due to performance issues and being forced to impose a crop, but not wanting to impose a severe one.
The R6 has some of the best 4k IQ out there because it's also oversampling. The R3 will have no quality issues with 4k video. Thermal issues? Let's hope Canon solved those.
I'm not saying the R3 isn’t exactly 6,000 x 4,000, I just used the video numbers as a possible support for Neuro’s idea that the EXIF might be ‘manipulated’ in the pre release cameras currently out there.