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The last sentence is the most important in your post. Get a foolproof basic
imaging routine up and running before moving on. For various reasons most imagers start off with a DSLR, and some, who are not after perfection, stay
with one.
In your case, get your polar alignment routine second nature, same goes for whatever method you are using for focusing. With your ED100 you should
be able to routinely get round stars using subs of around 40-60 secs, and
sometimes longer. Forget guiding until you master the basics, especially,
and most importantly, basic processing, which is as important as gathering good data in the first place.
Incidentally, my image is a JPEG taken with an 8" Newt, 10 X 30secs
unguided using a DSLR; close to as basic as it gets.
raymo
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