Quote:
Originally Posted by Cyberman
Thanks Alex and Martin for your suggestions
Alex it could be dew but I think it looks like the optical train/ coma corrector. as per Martin.
I use flats. I use a tracing pad and 1 layer of thin white cardboard and 2 layers of Tshirt . 0.5sec exposure gets 1/3 across the histogram but I don't have access to ADU. This gets rid of my dust dougnuts but not this vignetting. I have tried the vignetting tab in the wipe function of startools and it looked different but not better.
I also do dark flats and biases. maybe I don't need the dark flats.
I will also try Siril background extraction as suggested by Glenn. I wonder if I can use this with Startools.
Cheers, Rob.
|
Startools is a different animal from most post processing software , it actively tracks your signal and noise during processing and keeps a history of before and after activities to mathematically provide the best outcome for each module / tool ( Active tracking signal processing)
If you interrupt the processing at any stage with another softwares traditional processing techniques , Startools has no record of what your did or tried to achieve. This is counter intuitive and not recommended
However, in saying that you can use another software processing tool after Startools is completed ( after final noise reduction and saved ) to re process an image. Some folk use PI or Photoshop to tweak colour after completion of Startools as they find Startools difficult to use the Colour module. ( personally I don’t have an issue with ST colour module )
Cheers
Martin