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John that is great work.
I have been trying out a D50 and it seems to get more noise on the one hand but better color on the other.
I have not taken any shots and done a dark fram subtract yet but on long exposures it would seem a must..at least with the one I am using...
I am going to give it a go next in the cooler box see if that helps.
There is a free program called Deep Sky Stacker that allows you to stack multiple shots to excellent effect and subtract a dark frame easily. or have you done that? and I missed it...
Good luck you are a natural.
alex
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