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I've got a canon DSLR setup and I've been using Backyard EOS, there's a free trial but I bought the full version because it's so useful. The program has screens to help with drift alignment, focussing, and also separate screens for DSO and planetary photography.
Just with good polar alignment I've managed 2 minute exposures on an old EQ6 but I have to throw out a lot die to tracking errors. Maybe 1 in 4 is good, which is why I'm slowly sorting out an Autoguider.
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