Oversampling & high ISO noise test

[Jay60p]

I started with mirrorless video a year and a half ago and I'm still learning how it works.
Recent discussions about new cameras and image quality got me wondering about
how much oversampling cleans up noise in high ISO shots. Especially in Super35.

So I shot this test on my X-T3, ISO 25600, 18-55 zoom at f8 on tripod from the same position. Varied shutter for exposure. Samples straight from camera without any grading. (First time I ever shot at this high ISO!) Natural room light from windows with Sunlight white balance.

First - actual size crop from a “FINE” JPG photo at 6240 x 3512 for a 1:1 (not oversampled) comparison. Eterna profile with boosted color, noise reduction -4 and sharpness -4, lowest.

 

Second - actual size crop from an oversampled UHD 60p 10bit HEVC movie frame, same settings:
 

 

the 6K is from this angle:

 

and the 4K oversampled is from this angle:

which required a little zoom lens trial and error to get the "actual size" crops equal to compare.

 

I also recall Andriodlad said something about the Fuji 60p having a little less oversampling than 24p or 30p, they would be cleaner.