My A7RII arrived late. So I was able to shoot with the ZM 15 only.
The following pictures are the entire test scenes with no vignette or color cast correction. I want to show you guys how much the A7RII is better than the A7R. It's even better than the A7S IMO.
These were shot at WO.
A7R:
A7S:
A7RII:
So the next part, I'll only show the tip of the corner. I applied same vignette correction so you guys can see at 100% how much brighter the A7RII is. It's also easier to see the smearing here. The amount I applied is 3EV in C1. I also include the A7S.Mod result so you know what to expect in the corner.
I hate to be the bearer of bad news
. There is no improvement whatsoever that I can see. If there is any, it would be minimal. The ZM 15 is an extreme case, nonetheless.