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Thanks for the feedback. These few simple comments really do help. I need some reality checks. My sense of the aesthetic is obviously different to most people and I really should start thinking about what other people like. I think that I know what people mean when they say “natural looking”. It is an approximation to the subdued colour we would probably see if our night vision allowed us to. Although I plan to produce some more natural looking pictures, I still think every deep sky image is a lie in the sense that it portrays an object in a way the human brain-eye combination could never truly see.
Image 1: H alpha only
Image 2: Red = Ha alpha, Green = (H alpha+2*OIII)/3, Blue = OIII
Image 3: Red = Ha alpha, Green = OIII, Blue = Blue
Image 4: Red = Ha alpha, Green = OIII, Blue = SII
Image 5: Red = SII, Green = Ha, Blue = OIII
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