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NGC 457 (Owl Cluster)


NGC 457 (Owl Cluster)

Acquisition:

Bortle 6-7 skies
Nikon D7000 camera
Orion Apex 102mm telescope, 1300mm focal length
iOptron CEM26 mount
30s x 131 frames
f/12.7
ISO 400

Processing:

Siril:

Background extraction
Generalized hyperbolic transformation
Histogram manual adjustment

RawTherapee:

Luminance and chrominance noise reduction
Black point
Contrast
Highlight compression

GIMP:

Levels






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