I took this on the last trip to my dark site observatory.
AP140, 6 x 20 minutes, Astrodon 5nm Ha, PMX mount, MMOAG and SBIG STi guided. 1050mm focal length F7.5.
http://upload.pbase.com/image/150155483 crop
http://upload.pbase.com/gregbradley/image/150155471 full frame
The 20 minute exposures were a test and I am happy with the results. It just gives that extra depth with less noise that Ha needs. Even longer subexposures may be even better if the tracking can take it.
I got the other narrowband data for this image as well. So a narrowband version to come if it turns out well enough.
Greg.