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Originally Posted by jjjnettie
When I first looked through my new scope, I couldn't get it focused and thought it was a collimation problem. But after leaving the scope to cool for 1/2 hour, things cleared up heaps. Personally, I wouldn't dive in and twist those knobs too soon.
Same with the dusty mirror, I think that most people would agree that a lightish coating of dust on the mirror won't affect what you see through the EP too much. Whereas an accidental scratch from cleaning will effect it for ever.
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Thanks for your advice
. However, it did need the collimation, and it was a good time to start to learn how to do it. Cooling is not a big problem where I am, the temperatures don't drop a great deal during the night. I just have to watch taking it from an air-conditioned environment to the outdoors, a sort of reverse situation. The dust, well, I'll keep an eye on it and see how it goes. It's just bad luck that dust is part of the environment in the north, so I'll learn to live with it, a little bit anyway.
I had another good night tonight, picking up a number of the Messier objects around Sagittarius.
Graeme