I did some re-processing of my Horsehead H-a test shot with the OS RH200 f/3. 5nm Ha bandpass from San Jose, California. I can barely see 3rd magnitude from my city location.
That's a wonderful Ha shot John. Its like looking at a river in the sky. All the various flows and patterns are quite well defined.
How come there are hardly any stars? It looks like you have your RH200 quite well under control as fas as flex and guiding goes.
Greg.
Last edited by gregbradley; 02-06-2013 at 11:16 AM.