Quote:
Originally Posted by thegableguy
Yes, they're supposed to look like white washed-out pictures, with the peak of the histogram just left of halfway along.
Focus is important because it'll affect the amount of vignetting. (Not a lot, but enough.) Orientation will affect the direction of the vignetting. The vignetting is largely what flats are used to eliminate.
Having said that, I get vastly better results if I don't use flats. I've tried using them repeatedly, following all the instructions I've been told or have found, and they invariably end up ruining my stacks. No idea why but I've vowed that tonight's effort was the last time I tried them until I know better why they screw everything up every time!
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Thanks Chris, I may five it a go without the flats and see what it looks like.
BTW, I meant no insult by directing my question to Rob. Still learning the lay of the land around here.