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Night Sky Flats

Benoit Saintot
in PixInsight
Hello there

I just watched the video about Night Sky Flats, and wonder if default parameters are OK in WBB for creating master flats this way. It sounds to me like we have to use more restrictive rejection settings for this particular process, but as weather here does not me allow to run tests , I wonder what are your recommandations for that .

Thanks !

Ben

Comments

  • BlockHeadBlockHead
    Yes. You might want to be more aggressive. It is easy to tell.. just look at the result. 
    However, you really need to take SO MANY images...for this kind of flats to work...that with so many images- even the default rejection will likely work just fine.

    -the Blockhead
  • Benoit Saintot
    Thanks Adam
    How many frames do you recommend for Night Sky Flats ?

    Ben
  • BlockHeadBlockHead
    There is no upper limit... so ... 50?
    -the Blockhead
  • Benoit Saintot
    Thanks Adam,
    I'll try to build a sequence in NINA for that , and have it as an instruction set.
    As long as nothing is black clipped, I guess individual exposure time might be shorter for these night sky flats than for the sub frames .
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