I've tried many different vintage lenses, my problem is that I don't see well enough to manual focus, so I find it frustrating as well as fuzzy. Here a few that were easy to grab. I tend to believe that Olympus OM lenses were supurb, I just did not have any images already online.
Old Sigma 600mm Mirror Lens
Tokina 400mm f/5.6
Nikkor 300mm f/2.8
Hasselblad 250mm sonar
Nikkor 500mm Reflex Mirror lens
One of these days, I'll try this one, if I have a adaptor that can be rigged.