Caldwell 20, IC 5070. (reprocessed)

 Posted: Apr 2nd, 2026
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NGC
IC
HD
Technical Info
Telescope/Lens: Canon EF-S 55-250mm
Camera: Canon 1100Da
Mount: Штатив
Guide Scope: ручное ведение
Software: Sequator, Siril 1.4 beta2, Starnet++ GUI, Adobe Lightroom.
Exposure:
120 x 5" ISO/Gain: 1600 - f5.0, 100mm.
Yellow, Bortle 5 zone:
 S Rameno Syzranskiy R-N, Russia
 Nov 1st, 2025
10 m
9
Resolution: 2984x2310 px
Scale: 2893 KB
I played around with the channels on an old photo using Siril, removed the blue channel, duplicated the red channel with hydrogen (set it to R and G), and placed the green channel into B. The result seems to have turned out better. I made a mistake back then during shooting—I should have set the exposure to 3 seconds to avoid the trailing that's present now.

Frame crop.
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