Posts: 13
Threads: 5
Joined: May 2018
Reputation:
0
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?
Posts: 1,304
Threads: 109
Joined: Nov 2017
Reputation:
15
Hi,
The best way to answer this sort of question is with the Exposure Calculator. Right-click on the schedule to open the calculator. Then you can do things like try different subs to see how that affects the SNR.
Clear skies,
Greg
SkyTools Developer
Posts: 1,304
Threads: 109
Joined: Nov 2017
Reputation:
15
(2018-09-14, 04:04 PM)waynehixson Wrote: (2018-09-14, 01:12 PM)theskyhound Wrote: Hi,
The best way to answer this sort of question is with the Exposure Calculator. Right-click on the schedule to open the calculator. Then you can do things like try different subs to see how that affects the SNR.
Cool! Thanks.
One others question I haven’t found an answer to yet. Can ST alternate exposures and not do all of one filter at a time?
The algorithm is designed to maximize SNR, and this works best in blocks for each exposure. What is the advantage of rotating filters? Are you doing photometry?
Clear skies,
Greg
SkyTools Developer