NGC 2903

Acquisition:

Bortle 7 skies
Nikon D7000 camera
Orion Apex 102mm telescope, 1300mm focal length
Orion AstroView EQ3 and iOptron CEM26 mounts
30s x 616 frames (115 on EQ3, 501 on CEM26)
f/12.7
ISO 800

Processing:

Siril:

Background extraction
Background neutralization
Color correction (on galaxy core)
Asinh transformation
Manual histogram stretching

RawTherapee:

Luminance and chroma denoising

GIMP:
Levels adjustment
Luminance curve adjustment
Blue curve adjustment (to bring out the blue in the arms)
Red curve adjustment (to give the core a bit more orange)
Black point adjustment