Greetings All, I recently purchased this lens used and immediately fell in love with the build. I've discovered however it doesn't focus at infinity - falling short of realizing perfect focus (in other words, it doesn't rack past inifinity, it stops short) - and am trying to determine if its a problem with this copy - or an attribute of the lens. I've tried it on a couple of F2's, my F6 and D3s all with similar results. Does anyone else shoot this lens and have a similar issue trying to focus at infinity - or did I get a lemon? Any input greatly appreciated.