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i have found my QHY8 has a bit of green in the images, having said that it can be removed so its not a big deal, i use deep sky stacker and then tinker in photoshop, i cant say vignetting has been an issue for me, as for color balace i think a better monitor would help me as i have trouble determining some colors......
flats i do are the t shirt variety, i expose at gain 50 and offset 117, i asume the gradients are from light pollution so i havent really had to deal with them . PM me if you want more details.
cheers clive.
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