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In anticipation of buying my new camera I have been thinking about everything that might come up when I first get to use it. I was going to ask if people use one set of flats for each filter used? or shoot one set of flats per night and use it for all the exposures. I think that vignetting would be constant across the sensor, but I would have thought that downsizing the 1X1 bin to 2X2 would produce a better result. In my experience upsizing images will lead to pixelation which may cause bad corrections.
The only bad thing about doing it this way that I can see is you do not account for any dust on individual filters. But depending on how clean they are it may be quicker.
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