Quote:
Originally Posted by ghsmith45
Nice sharp image, but a few dust donuts. Did you use flats?
Geoff
Added: Should have read on before replying after just looking at the pic. What was the problem with the flats?
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Yes the calibration [lack of] really shows. I got my flats peak at 16000ADU. 16bit camera / 30% of the full well. I thought I was within range. Got inverted vignetting. Very dark in the center and bright on the outside when flats were applied so I clearly got the ranges wrong. Gotta talk to Monte this week-end and pick his brain at Ilford. I think I'm doing something wrong with the software as well.