Good luck Raymo, PA is the only drawback with these units but once you find a way of getting better PA, 2 mins with a 50mm lens should be no problem. The best I have done with the Nano is 40sec @ 500mm! My PA is good enough now to take 90 secs @ 135mm fairly consistently.
By the way, that's a nice shot of Orion you took. You should be able to replicate that with just using the Nano Tracker now. You'll be amazed with the results you can achieve.
