The Cygnus Loop

 Posted: Aug 20th, 2026
Technical Info
Telescope/Lens: ZWO Seestar S30 Pro
Camera: Sony IMX585 color sensor (1/1.2-inch format)
Mount: ZWO Seestar S30 Pro (EQ mode)
Software: Siril (THX2 Naztronomy and VeraLux!)
Exposure:
760 x 20" ISO/Gain: 0 - taken over 3 mosiac sessions (packed-up between sessions)
83 x 30" ISO/Gain: 0 - 1 mosaic session
129 x 60" ISO/Gain: 0 - 1 mosaic session
 Southern Manitoba, Canada
7 h 4 m
3
Resolution: 5051x2841 px
Scale: 71364 KB

Image Comments:  Need more signal data!  More Cygnus Loop sessions in my future.  At 7.06 hours (without dividing that number by whatever number of panels -I don't have any idea- that my S30 Pro is using in the mosiacs).

General Comments:
I'm loving the Seestar S30 Pro!  I'm learning Siril on the go, so much more to learn about the finer aspects of the scripts.  As you have probably already guessed, when looking at this particular image, I'm fairly hesitant with my histogram and curve transformations.  For now I'm trying to be conservative.  Current goal is to be able to darken the background to my liking, while having the remainder of the starless image remain properly displayed (viewable) without being overly stretched.  Haven't spent any $$$ on scripts...yet.

My special appreciation goes to Naztronomy and so many other YouTube content providers that are so dedicated to the scientific-art of Astrophotography!

-Stargazer.man

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