Default Blur Setting Flat Field Master Creation changed  


Main Sequence Star Customer
Joined:11 months  ago
Posts: 45
May 23, 2018 22:07  

Hi Mabula,

In the new Version 1.061 the default blur setting for the creation of Flat Masters changed to "none". It used to be 3x3 before. Why is that so?


Quasar Admin
Joined:1 year  ago
Posts: 1632
May 23, 2018 23:59  

Hi Stephan @schurig,

I changed the default setting, since using a blurring with a median filter does have a very minor effect on the actual vignetting model of your flats.

Only in cases of extreme vignetting, you don't want to use blur, since it can actually degrade the masterflat quality for correcting the vignetting.

But in cases of medium or minor vignetting, the blurring can still be applied without problems, even multiple passes.

So, if you use a 1-2x 3x3 median blur on the masterflat and the outcome is good, then use it by all means since the masterflat will probably inject a lot less noise in your lights.

Kind regards,



Main developer of Astro Pixel Processor and owner of Aries Productions