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Messier 8 (Lagoon Nebula)


Messier 8 (Lagoon Nebula)

Acquisition:

Bortle 2-3 skies
Nikon D5600 camera
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 43 frames (21.5m) - clouds and technical issues

Processing:

Siril 1.2.1:

Crop to 5000 x 3600px
GraXpert gradient reduction (not much needed, but...)
BQ Octantis' procedure of white balance, background subtraction, histogram conditioning, and black clipping
StarNet++:
Background - modified asinh stretch (6x), histogram midpoint adjustment
Stars - modified asinh stretch (4x), saturation

RawTherapee 5.9:

Luminance noise reduction

GIMP 2.10:

Crop to 4600 x 3500px (for framing better)
Luminance curve
Saturation






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