Thanks for that explanation. =) Didn't know about the h.265 encoder chip. I'd been hoping they'd give us s-log3 with the next iteration of A7S (which surprisingly they did). Now I'm looking to the A7S II, with the promise of easier grading with S-log3/S-gamut3/Cine for run-and-gun shoots, for travel and documentary work I'm undertaking in a few months. Can't say I have much to complain (except battery life, like everyone else). Question: How is there not a bigger file size difference between a 4k 10 bit Prores 422 HQ file out of Ursa mini (110 MB/s) and the Sony's own 4k 8 bit S-log 3 file (100MB/s)?