Miro Markov wrote:It really was an edge case - 60fps, 1/120, 422 HQ, ISO high as a kite, couldn't use lights, it was dark outside, i believe i was shooting @ 1.8 and i've done this before, but XT4 (for example) never introduced such artifacts - that's why i was wondering if it's the 4D sensor or something...
Is it sensor and is it an issue that does matter? Maybe, and maybe it doesn't.
On one side if you watch reviews of BMCC 6K they've been pointing out something similar to your example in heavily underexposed shots.
On the other side, from what I have seen people sharing files from practically any camera will start falling apart once heavily under/over exposed and question isn't will they fall apart, but how soon. If you watch YT reviews by Josh Sattin, for example, he compared over/under latitude from many cameras and many of them are more or less equally resistant but once they do reach limit start falling apart in different ways, none is perfect. So you will need to ask yourself how many stops of under exposure you had there, have you exceeded what is reasonable limit, and what experience other owners of same camera have when using it in same way.