I would almost pay it to get a slop-free manual focus ring! (Of course I could do that by moving to the 50 mm f/1.8!)
Or better yet, the 45 TSE -- another of my favorites...
Here is an "action" shot I captured with the 45 TSE on a 5D:
The full story is I was shooting desert scenics and came upon this old abandoned motel/bar/pool out in the middle of nowhere while scouting for a shot. The light wasn't great yet as the sun was still a bit too high for landscapes, so I was just nosing around looking for a later shot op, carrying only my 5D with 45 TSE mounted. My other gear was several hundred yards away in the car when I turned the corner and stumbled onto these guys. I would have much preferred the 50/1.4 or 85/1.8 on the camera at that moment, but we make do with what we have
Here is my favorite of that series, also taken with the 45 TSE on the 5D:
Cheers,