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Hmm ..
Ok, I am using a DSLR for the imaging so I know there will be noise, a lot of noise actually (10 year old canon).. I also know that dark/image frames need to have the same exposure times. But hat about the flats? If I take 10 images at 20 seconds, and 10 images at 60 seconds then do I take 10 flats at 20s and 10 flats at 60s?
Cheers,
Matt.
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