This is only true if the AF is up to focusing in the time allotted. 1/20 is 50 ms and that happens to be Canon's quoted maximum speed of focus but with what lens? I'll be shocked and very pleased if I can get sharp photos in a scenario with 20 fps and 400 DO II X2 III. The 1DX2 has never consistently been able to do that at 4K30 and certainly not at 4K60. I will never come on CR complaining about what I consider to be very challenging expectations but I'll surely be singing praises if it's that good.the most compelling reason for 8k now this year 2020 that I've heard.
Now if the situation is not so challenging then a couple seconds of 8K30 could generate some very nice photos, no doubt. Even if 1/10 were in focus that would be very valuable. And 10 seconds of a beautiful scene could generate some amazing video with panning and zooming and still super resolution. But what do we hear - complaints that you can't shoot an hour of it. All the whining and grizzling about the R5 tells far more about the personalities than the camera.
Jack
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