Hi Mike,
Just caught your article on Dob Imaging. Very Nice!
I believe the article was for undriven Dobs, but thought you might like to see what I've managed to do with a driven Dob. I've just started using a ST-10XME CCD camera with a 25" Dob, Pyxis Field De-Rotator and an AO-7. You can see some of the images at
www.dansdobimaging.com .
Clear skies,
Dan