Quote:
Originally Posted by little col
thanks for your verification of the hot pixel issue , does this mean i have to take exactly the same amount of dark frames as i take light frames ?
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Yes and no.
You need to take dark frames of the same exposure time as your light exposures. It is usual to take a number of dark exposures and average them is some way. I usually take 6 frames and median combine them. I then use the same dark frame on all of my sub frames. If this is all double dutch take a look at
http://www.astrosurf.com/buil/iris/t...2/doc91_us.htm
for a tute on image processing. There are many other tutorials also available.
Good luck