Thanks for taking a look Andrew. 1. I've not checked if the EVF is turned off in the menus. I will do so and test again tonight. 2. I was in fact in S-LOG3 mode while shooting this and I had the lens all the way open at F4 the whole time. I'll try overexposing it 2 stops to the right on the LCD exposure meter tonight as well. I agree about there being some level of noise no matter what in the deepest blacks but it still seems odd to me that, all things equal, ISO 10,000 through 25,000 would look better then ISO 4,000 to 8,000. Again I'll run a test tonight in a different picture profile without S-LOG and see what happens. What's really bugging me is what happens between ISO 10,000 and 8,000. It's an extreme not seen between any other ISO.