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Old 12-08-2021, 09:16 AM
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PKay (Peter)
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Join Date: May 2017
Location: DEPOT BEACH
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NGC253 LRGB Ha O3

Image specs: LRGB, Ha, O3: 30 X 300s each filter.

Pixinsight:
WBP, Automatic Background Extraction, EZ noise removal, Histogram Transformation, LRGB combination, NBRGB script (add Ha & O3), Curves Transformation (saturation only).
EZ Deconvolution (introduced some small rings around stars).

Photoshop:
Manually removed the artefacts (rings, about some stars) using a mask and then blur and smudge tools.
A minor adjustment to lightness, saturation and colour balance.

https://www.astrobin.com/full/ryf3gd/C/?mod=&real=

Thanks for looking, help appreciated
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