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Old 14-09-2011, 09:48 PM
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RobF (Rob)
Mostly harmless...

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Join Date: Jul 2008
Location: Brisbane, Australia
Posts: 5,735
I don't have all the answers (any answers ) Peter, but will be watching for people's thoughts with interest. From a dark sky site I find I can usually wing it better just using dynamic background correction in Pixinsight, but from a city location with greater skyglow or through my Ha filter the vignetting is too pronounced. I think I've seen Marc suggest a way of "backing down" flats to subdue the effect.

Sorry for lack of hard facts though
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