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Messier 45 (Pleiades Cluster)


Messier 45 (Pleiades Cluster)

Acquisition:

Bortle 7 skies
Nikon D5600 camera (unmodified)
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
20s x 721 frames (4h)

Processing:

Siril 1.2.1:

Crop to 5800 x 3600px
BQ Octantis' procedure of white balance, background subtraction, histogram conditioning, and black clipping
Generalized hyperbolic transformation stretch (3X)

RawTherapee 5.9:

L*a*b* CL curve (to reduce background chroma noise)
Luminance noise reduction

GIMP 2.10:

Luminance curve
Saturation






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