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2022-01-07:  APP 1.083 has been released !!!

1.083 Windows 64bits download

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  • new Star Reducer Tool
  • 15-30% speed increase in processing
  • introducing Comet registration
  • support for new camera models like Canon EOS R5,R6
  • Greatly improved HSL Selective Color Tool
  • New Batch Tools
  • New File Saver Module with PNG support

Extreme areas in magenta  


Hydrogen Atom Customer
Joined: 1 year ago
Posts: 1
October 11, 2021 17:17  

Hi there,
Can someone help me here?
Why do I have such extreme areas in magenta in my picture after the starcolor calibration? 🙁

BTW: I used a dual narrowband filter for this image, but i think this is not the problem.


Best regards
Stefan 🙂

Bildschirmfoto 2021 10 11 um 17.08.15


Quasar Admin
Joined: 5 years ago
Posts: 4172
October 11, 2021 17:29  

Though I've not seen such an extreme result yet, it in fact is a problem to color calibrate narrowband data. The color calibration needs broad spectrum data, because it works on the assumption it sees this from the stars in the image (black body radiation). Narrowband data you need to tweak yourself regarding the color. Sometimes you can be lucky and it produces something you like, but it won't be accurate.