DPReview hype 5D Mark IV sensor dynamic range
"Dramatic dynamic range improvement"
"Back when we were briefed by Canon about its update to one of the most popular line of digital SLRs in existence, Canon told us that dynamic range was one of the top concerns of current 5D-series owners."
"A major leap forward"
https://***URL removed***/news/3229755227/canon-5d-mark-iv-brings-dramatic-dynamic-range-improvements-to-the-5d-line
...
So let's take a look at the reality behind the hype...
Oh hey it's their own test s
Erm
5D Mk3 100 ISO pushed 6 stops
5D Mk4 100 ISO pushed 6 stops
At 6400 ISO they look about the same except the MK4 is sharper than the MK3 and the D750. While it's not ISO invariant like the Nikons, it is a huge improvement over the Mk3, and that noise isn't hard to clean up in ACR. It's almost as resolute as the D810.
D750 6400 ISO
5D Mk4 6400 ISO
If you need to push any DSLR video 6 stops good luck with that.