2018-09-14, 03:29 AM
I created a Ha-O3 plan for the Crescent Nebula. I set a SNR for O3 to 30 and Ha for 60. The plan created 6 x 9 minute subs for the O3 and 167 x 20 second subs for the Ha. This seems strange but maybe not? This is with an f/6.7 refractor and the ASI1600 camera. Maybe I shouldn't set different SNRs per filter?