A completely clear night – not that many of them lately – provided several hours of H-alpha to catch the nebulosities above. Meanwhile I switched from the Optolong LRGBSHO filter set to the new Baader CMOS-optimized filters. At least H-alpha seems to work better in the combination with the Esprit 100 ED and QHY 268M, but still some problems with the flats.

See Astrobin here and here for details.

Backyard astrophotography in light-polluted Cologne-Dellbrück (SQM 19.8)
Skywatcher Esprit 100/550 ED, Skywatcher Flattener, Baader CMOS-optimized Ha 6.5nm / QHY268M
OAG with Lodestar X2
Mount AZ EQ6 GT
Image acquisition: CdC, NINA, PHD2, dithering
Ha: 26 x 600s, mode 1, gain 56, offset 10, -5C, 20 flats, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Lightroom

Backyard astrophotography in light-polluted Cologne-Dellbrück (SQM 20.0)
Skywatcher Esprit 100/550 ED, Skywatcher Flattener, Baader CMOS-optimized Ha 6.5nm / QHY268M
OAG with Lodestar X2
Mount AZ EQ6 GT
Image acquisition: CdC, NINA, PHD2, dithering
Ha: 19 x 600s, mode 1, gain 56, offset 10, -5C, 20 flats, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Lightroom