[gregbradley]

I was wanting to start a thread on this as its often a tricky point of processing that can impact on the quality of your image heavily.

Its probably more vital with a long focal length scope but also vital when you image in light polluted areas.

Richard Crisp has done a paper on it. I will try to find the link and post it here.

So what is your best procedure for doing flats - both DSLRs and CCD cameras?

Greg.