[ATM] Star testing an uncoated mirror? No luck.
wa4guu at verizon.net
Thu Oct 22 09:02:58 JST 2009
It wasn't a crow...
It was a glint of sunlight in a Raven's eye.
I have recently star tested a couple of 6" mirrors. I did so in the
telescope and collimated indoors prior to taking the scope outside. It can
be a pain to collimate an uncoated mirror and next to impossible in the
dark. It helps to block all light from the back end of the tube while
> -----Original Message-----
> From: Guy Brandenburg
> BTW - how on earth does somebody do a star test on a mirror by using the
> reflection off the eye of a crow, as was related to me by John Dobson? Or
> is that just a myth, promoted by a mythical being?
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