I dug out my Ultron as I’m planning to take it to a local repairer this week and get to the bottom of whatever’s ailing it. They did a number on my M5 but had good luck with vintage lenses so far.
Not as bad as I remember, but he grassing happened very quickly. I don’t mind it at all. The hood, which is floating around somewhere, fared a bit worse.
I’d share some samples but I don’t have a coded adapter (for identification shooting digital) nor keep detailed records of my images, so I couldn’t tell you which were which, but the internet being what it is, there’s plenty of info out there.