10 min subs 4hours total TEC180 at a dark site, Proline 16803 camera 60% QE. No noise.
http://www.pbase.com/gregbradley/image/108830707/large
Its a large APO though, sensitive camera, very dark skies and reasonably good seeing.
The best resource for image processing how to's is Adam Block DVD tutorials. Well worth the money. He has some new ones
out. I ordered one of them. I should have it soon.
Greg.