Quote:
Originally Posted by billdan
I think the read noise figures are being interperated as some kind of boogie man. The 10e ( or 8e quoted from SBIG) is the same as the QHY12 and other CCD's from 4 years ago. It just means don't do 10sec subs with them, in the majority of sub lengths we do (3 plus minutes) read noise is never an issue.
What would concern me more is being a Kodak chip, RBI can rear its ugly head.
Bill
|
I think that read noise can still be the limiting issue with narrowband under some circumstances Bill. With dark skies, very few systems get to be sky limited in NB and dark current can be low with qood cooling, so all that is left is read noise. low read noise is better.
Having said that though, many people do NB imaging under bright sky with moonlight - 10e will be plenty good enough for that.