Sh2-157, NGC 7635, Sh2-155, NGC 7538 and much more

 Posted: Sep 15th, 2025
Show astrometry on hover
NGC
IC
HD
Technical Info
Telescope/Lens: Samyang 135mm f/2.0 ED UMC
Camera: ZWO ASI533MM Pro
Mount: Proxisky Umi 17 Lite
Guide Scope: SV Bony SV165 40mm
Guide Camera: ZWO ASI678MM
Software: Siril, GraXpert, Adobe Photoshop, Seti Astro suite
Accessories: ZWO Asiair mini, ZWO EFW-S, ZWO EAF
Exposure:
42 x 300" ISO/Gain: 100 - Ha
41 x 300" ISO/Gain: 100 - OIII
36 x 300" ISO/Gain: 100 - SII
Yellow zoneLight Pollution:
 Lipeck, Russia
 Sep 12th, 2025
9 h 55 m
1239
Resolution: 2948x2879 px
Scale: 5627 KB
Add comment

Comments

Green is abundant; I recommend accumulating more sulfur and oxygen than hydrogen.
3 Oct, 2025 Reply
Cats Replied to Cats
About twice as much
3 Oct, 2025 Reply
Lxkor Replied to Cats
I'm not entirely sure about the advice. If I'm not mistaken, accumulating signal improves the signal-to-noise ratio, but the amount of hydrogen or oxygen present remains the same—it's just that the noise is reduced. You can stretch different channels more aggressively, but I tried to roughly align the black point and histogram peaks.
3 Oct, 2025 Reply
Cats Replied to Lxkor
Oxygen and sulfur will appear "more prominent." You can then balance their brightness during processing, which will bring out more "refined" hues.
3 Oct, 2025 Reply
Lxkor Replied to Cats
Alright, worth a try.
4 Oct, 2025 Reply

Comments are available only to registered users. Register or log in to leave a comment.