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Messier 57 (Ring Nebula)


Messier 57 (Ring Nebula)

Acquisition:

Bortle 6-7 skies
Nikon D7000 camera
Orion Apex 102mm telescope, 1300mm focal length
iOptron CEM26 mount
30s x 134 frames
f/12.7
ISO 400

Processing:

Siril:

Background extraction
Arcsinh transformation
Histogram manual adjustment

RawTherapee:

Luminance noise reduction
Saturation

GIMP:

Luminance curve adjustment
Sharpness






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