Quote Originally Posted by David Grenet View Post
I have one, but I'm afraid I don't really have anything to compare it to so I probably can't help there...

The one I have is a 300/5.6 telephoto lens mounted in a copal 1.
I'd be interested about your feedback about using it for 4/5 ? I own a Tachihara and would love to get a long lens for it, so the light weight of these seems interesting.