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(@evolve)
White Dwarf Customer
Joined: 9 months ago
Posts: 12
March 25, 2020 21:08  

I always have a kind of Halo around. Hard to Explain but easy to see, so I send you the Original Data.

(Yes i know on the Final picture is still some dust i figure out my camera has an Automatic Cleaning Program this is now Disabled so in Future the dust should be in the Light too)

Maybe you can give me an advice how to make better lights or its just an setting Problem ?

Download Link Originals

https://we.tl/t-gShu5Vh9Mb

(WeTransfer.com link)


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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1746
March 27, 2020 10:56  

Thanks for the link, I'll have a look.


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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1746
March 30, 2020 10:49  

Looking at your data now;

- Your masterflat doesn't have any dust showing up in it. It also seems to be of a too low signal, the unstretched histogram is all the way to the left as you can see below; it should be more or less in the middle.

Screenshot 2020 03 30 at 10.46.26

- Looking at your master integration, indeed I still see dust so in this case the flat isn't correct and it's better to leave flat calibration out if that's the case as it can cause more issues instead of a nice correction. Not sure, but maybe this also causes this ring around your data, can you try an integration without using flats?


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(@evolve)
White Dwarf Customer
Joined: 9 months ago
Posts: 12
March 30, 2020 17:06  

@vincent-mod

Without flat, it's not better.

I read do Flats in the 33% area (Histogram), so I try next time 66% around (the peak)

Yes I find out, my camera did an automatic cleaning program on every start so every time on Battery Change the Dust Situation Changed I switched off this now. But this shouldn't be the Halo problem. Hopefully next Clear night coming soon.


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