Howdy Frank,
These shots were first go's with my modded 40D and Astronomik 12nm Ha clip in filter. Both iso1600, stacks of 10min subs (can't recall exact numbers...10-18??), ICNR on.
Since doing these I've started to push the exposure times to 15mins.
http://s327.photobucket.com/albums/k...urrent=22d.jpg
http://i327.photobucket.com/albums/k...g?t=1254379219
Doug