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M101 The Pinwheel Galaxy


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13 minutes ago, Dmack1 said:

I struggled a bit with the background on this one. It seems if I do any noise reduction at linear stage with data fro the 2600mc, I end up with nasty red blotchy background. So this is just a gently TGVD after stretching.


SW Evostar80ED, NEQ6, ASI2600mc 160 x 120s


Suggestions for improvement appreciated.



I noticed with my 1600 doing noise reduction on the LRGB in the linear state produces awful results, so I tend to apply either TGV or MultiScale MedianTransform in the non-linear state, after colour combination. Strangely enough, noise reduction on NB images in the linear state works fine.

Edited by AstronomyUkraine
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14 minutes ago, TareqPhoto said:

That is a lovely nice image, good job!


Did you use any filter with the camera?


Which Bortle sky?

Thank you. No filter, Map says bortle 4 but with sodium street light close to my boundary

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