I have added some images of the problems i encountered with processing this image.
Would appreciate any thoughts in what i might been doing wrong to cause these or if they are just unavoidable.
First is the terrible vignetting i get as you can see from the full frame image.
I had applied 25 flats for each filter taken with the optical system setup identical to the acquisition moment. ie focus rotation and temp.
The other is an odd artifact that's started appearing in my images of late that moves around. could be a problem with my camera
