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Darks frames killing/desaturating signal - Siril

Software DSO DSLR Astrophotography
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#1 llastrophotos

llastrophotos

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Posted 31 July 2021 - 08:07 AM

Hi Guys, I'm using Siril to do some DSO imaging.  The issue is that when I use dark frames it usually desaturates the image, sometimes to a point that my signal (usually the red from H-alpha emission) gets washed out as well.

I'm using cosmetic correction, trying go have just a few thousand pixels (less than 10k) corrected.  Master dark is generated by stacking Windsor sigma/Median sigma clipping without normalization.

For the stacking algorithm I usually go with Windsor sigma clipping with the default parameters that are 3 and 4 for sigma low/high respectively.

When stacking in DSS everything seems fine, but Siril dark calibration seems a little bit better, that is why I'm trying to make it work.

Here are the files if anyone wants to have a deeper look.


https://drive.google...mfw?usp=sharing

Thanks in advance,
Clear Skies

 

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