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Old 20-12-2020, 10:23 PM
Saturn488 (Chrys)
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What causes this effect?

DSLR, combination of darks/bias (still need to do flats). A combination of 525 10 second exposure shots.

The background is not uniform. Is this because I did not use flats? I know when I have used flats in the past I still get the same effect.
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  #2  
Old 20-12-2020, 10:28 PM
Saturn488 (Chrys)
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OK so I had to do a bit of a crop as it was picking up some junk on the edges. It's better but it still is a bit on the bright side.
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Old 21-12-2020, 09:36 AM
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DiscoDuck (Paul)
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If you mean that bit across the top, that will be just from the stacking. It will have moved/rotated the individual subs when stacking to match up the stars, and you end up with inconsistent coverage at the edges. Absolutely normal. Just crop it out.
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