Richard, amazing depth for the rather short (at least by your standards)
exposure time. Maybe the long time for each exposure does the trick...

Stefan

"Richard Crisp" schrieb im Newsbeitrag
t...
this is the final of the three images from my fremont peak outing last
night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E
camera and Pentax 150mm f/2.8 medium format (6x7) camera lens

http://www.narrowbandimaging.com/m24...03_bp_page.htm