Quote:
Originally Posted by bmitchell82
I have seen people talking about internal baffling either behind the secondary or all the way up the tube, will this make alot of difference for visual astro?
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Baffling has it's good and bad points.
On the down side it can trap heat in the tube, or push hot tube currents down into the light path as it rises up the tube. I suppose some people would say if you install a fan that blows across the mirror face to get rid of the heat that way you would reduce this problem.
You probably wont need any baffle low down near the mirror since the back of the skywatcher is enclosed, so you don't have to stop light coming from behind the mirror.
However it might pay to investigate a few baffles up near the secondary and focuser. There is not much at the front of the scope and it's easy to see how light could enter the focuser from the side at the front. A half-shield just extending from the front may solve this problem too. Newt is a good well-known program that computes baffle locations for you if you're interested. But I really don't think you'll need them all the way up the tube. A bit of judicious flocking would probably be better.