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Originally Posted by Robby
Yep that's pretty much it. I do dark frame on every image first. Then stack 10 at a time using this method. The opacity of each lay is reduced by 1/x for each layer.
Layer1 = 100%
Layer2 = 50%
Layer3 = 33%
Layer4 = 25% etc....
So with the 30 I ended up with 3 images after doing 3 seperate 10 stacks. Then stack those 3. Done  I know there are easier ways, but they cost money, which I don't have much of at the moment  .. Darn tax man!
Cheers |
Robby,
Iris written by Christian Buil can do a whole range of dark frame subtraction straight from the RAW's and it is for free.
http://www.astrosurf.org/buil/us/iris/iris.htm
Prepare for quiet a deep dig into the manual, if you have questions however, feel free to ask me.
Cheers,