I don't have a scope mount for my H2 (not even sure if one is available or possible) or a scope that would work with it, even if I did.
But, I see no reason why it wouldn't work really well with regular lenses just munted on a guided mount. I've been thinking about this as a project for next summer. My experience shows that long exposure are as clean as any camera or back I've ever seen. Just be aware though that you have a dark frame subtraction time of the same duration as the exposure itself, so don't figure on to many exposues in an evening.