Quote:
Originally Posted by Shiraz
Thanks for the feedback Cam.
I am not trying to make a case in support of "no flats", just trying to show what circumstances are necessary before the technique can work well. If your optics produce vignetting over the chip scale, flats are essential, regardless of actual chip size.
Do you use a panel designed for taking flats and do you use flats to reduce vignetting etc, to reduce FPN - or both?
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I realise, and I didn't mean to derail your thread - sorry if I have done.
I just use my PC's LCD screen for taking flats. With an APS-c sized chip on the AT65-EDQ there's no vignetting at all. I do get occasion dust marks on my images - I'm generally not too fussy about keeping the 2" filters spotless.
Cheers,
Cam