[David Fitz-Henr]

Originally Posted by Gem

Nice! Good job on a good target.

Thanks Grant!

Originally Posted by gregbradley

Yes its best to slide the black point up to close to the right hand side of the histogram but not all the way as you pointed out.

With noise reduction it needs to be selective. There is no point in reducing noise in the galaxy (unless it needs it) when the noise is in the background. All it does is reduce detail as noise reduction boils down to blurring.

Noel Carboni Photoshop actions reduce deep sky noise reduction works very well and seems to only be applied to dim regions.

Noise Ninja is very effective as well and is selective.

The mottled effect is from excessive blurring of the background colour noise.

Greg.

Thanks Greg - yes I did apply the noise reduction only to the background but looks to have been too aggressive. I'll try Carboni's action in the next (and hopefully final) repro!