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Hi, I did some review on the R6 Mark II, for low light photos only. It is in french here :
https://www.webastro.net/forums/topic/236222-test-complet-canon-eos-r6-mark-ii/

I also found it has the two offsets of 512 below 320 ISO and 2048 from 400 ISO.
The 200 ISO setting is worse (noise/dynamic) than 100 and 400 ISO.

Strange thing happens to the RAW when looking at the FFT of the bias images, two horizontal lines below and above the central module line... maybe due to Dual Pixels ?

Fred

Concerning Magic lantern, 5d3 has bigger userbase / more developers and is therefore more updated compared to 6d.

Yes, but the 5d3 is not as good as the 6D in low light...

By the way, is it a big work to modify the ML intervalometer so that it could allow shooting at 1/10s step, instead of 1s step ?

All the best

Fred

Would it be possible to allow an interval in half of quater or tenth of seconds for the intervalometer ?

This step by step procedure also works with the Canon 6D.

You forgot to say :

14. Go to "Focus stacking" > "Run focus stack" to start the focus stacking sequence

After the sequence has been finished, ML will return to the initial focus point. You can then :
- whether go back from step 6 to reselect your focus range from scratch
- or go back to 11 to reselect the end of the focus range

In step 9, read "go back to the main Focus Tab"

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By the way, for some reason I don't know, the focus stacking sequence only covers a bit less than half the range I selected between steps 7 and 12. I'm using a Canon 6D and a Canon 100 mm f/2.8 USM Macro lens. I therefore have do up to step 7 and then do the following :

8b. go to "Focus stacking" tab
9b. test and try various values between "Num. of pics in front" and "Focus steps/pictures", and if no combination is working, change the "step size" in the "Focus settings" tab. Don't press on "Copy rack/focus range".

14. Go to "Focus stacking" > "Run focus stack" to start the focus stacking sequence

Cheers

Fred