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Old 04-01-2009, 08:25 PM
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kinetic (Steve)
ATMer and Saganist

kinetic is offline
 
Join Date: Jun 2008
Location: Adelaide S.A.
Posts: 2,261
Hi Trev,

Here is an old bookmark I have which gives a good, overall
theory of Darks , Bias and Flats , with some examples of why
you need to do them. (examples of Dust bunnies, vignetting etc)

http://www.aavso.org/observing/progr...manual/3.shtml


Hope this helps,

Regards,

Steve
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