Nebula in natural color. Narrowband channelas are mixed to match visible spectrum. red=80%H-alpha+20%S-II, Green=O-III and Blue=80%O-III+20%H-alpha to compensate othewise missing H-beta.
Nebula in HST-palette, Red=S-II, Green=H-alpha and Blue=O-III
I reprocessed the Planetary nebula, M27.
Original post with details can be found here:
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