I photograph in RAW, and convert using Darktable. Camera happens to be Nikon D40, 55-200mm lens. For a small number of photos, especially of clear blue skies, I cannot reduce noise without introducing artefacts. This remains true when I change de-noising method, although I cannot claim to have tried everything. Is there a solution to this? Example to illustrate my question follows:
No denoise, no halo artefacts, but annoying noise:
Very light denoise (profiled, wavelets, strength 0.097), halo artefacts:
Any thoughts on this appreciated. :-)
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