I've had a PST, a Lunt 35, Lunt 60 PT and currently a Lunt PT 50 Double stack and I have to say the double stack is wonderful and easily the best. In single stack mode the resolution is obviously less than the 60mm but still quite acceptable (to me). By undoing the fitting on the B600 blocking filter and using a short adapter I can get focus on the full disk using the Gstar 3 camera no sweat at all even though Lunt recommend the B1200 for imaging.
I'm happy with what I have now - unless the wife lets me buy a Lunt 80DS
