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Originally Posted by bono
I guess accuracy of colours and details is not too important for me at this stage ...
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It's not really colour "accuracy" that suffers with a cheap refractor. The problem is that different colours do not reach focus at the same place so you get colour fringing. Some people don't mind. I personally hate it. I've attached a pics of Jupiter, one with simulated chromatic aberration. That is the
sort of thing you get with achromatic refractors, but it is not meant to be representative of any particular refractor. You really need to look through the scope yourself to see what you get and if you mind it or not.
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Originally Posted by bono
How are Dobsonians mounted? (excuse the ignorance). Don't they need a flat/non moving surface? Can they be tilted directly vertical?
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Dob mount is the simplest and easiest to use mount there is. Check out pics on dealer's manufacturer's sites. The Orion website (
www.oriontel.com) also have downloadable user's guides for their scopes you might want to look at. The XT8 is almost the same scope as the GS 8" (200mm) Dob.