M31 (highlighting regions with Ha, processing with subtraction (Ha - R))

 Posted: Oct 28th, 2025
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Technical Info
Telescope/Lens: Askar SQA 85 мм f/4.8
Camera: ZWO ASI 2600 MC
Mount: Ioptron HAE 29 C
Guide Scope: Askar 52 мм F4
Guide Camera: ZWO ASI 120 MM mini
Software: SharpCap 4.0, Siril, GraXpert
Exposure:
155 x 180" ISO/Gain: 100 - RGB
58 x 300" ISO/Gain: 100 - Askar D1 DUO (Oiii+Ha) 6 нм
Orange, Bortle 6 zone:
 Petushki Vladimirskaya Oblast, Russia
 Sep 13th, 2025
12 h 35 m
335
Resolution: 5663x3232 px
Scale: 3287 KB
Improved processing using the Siril HDR_multiscale script.
Plus culling of the original files.
Current photo Updated
  28 Oct, 2025
  12 h 35 m
Improved processing using the Siril HDR_multiscale script. Plus culling of the original files.
  17 Sep, 2025
  20 h 8 m
Pixel math in Siril was used to add narrowband H-alpha (Ha) data to the broadband RGB image. That is, the pure emission signal can be isolated from the Ha data…
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