|
This is something I have got to get right. I have so far been processing without flats as I can see they are having the wrong effect.
What is happening to me is that the correction of vignetting is too strong, the 9.25 SCT with 0.63 reducer shows significant vignetting at the edge of my sensor frame, but when I have tried using flats I have ended up with it over-corrected so the image brightens at the corners instead of fading out. I presume any dust bunnies would show the same effect but the sensor was pretty clean at the time I last tried so it was not obvious.
|