Quote:
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Originally Posted by asimov
The worst thing an astronomer can do is shine a torch on his optics.. 
Throw the thing away!  |
That, my friend, is one of the truest things ever said about scope optics.
Never... ever ... use a torch shining on a corrector/mirror as a guide to your optics.
I only use it (at an angle, mind you) to tell me if I'm all dewed up and it's time for bed
