[ATM] Star testing an uncoated mirror? No luck.

[Guy Brandenburg]

Ah, so others have heard the story, too.
Thanks for the background.

Guy 
--- On Wed, 10/21/09, Jerry <wa4guu at verizon.net> wrote:

> From: Jerry <wa4guu at verizon.net>
> Subject: RE: [ATM] Star testing an uncoated mirror? No luck.
> To: "'Guy Brandenburg'" <gfbrandenburg at yahoo.com>, "'atmlist'" <atm at atmlist.net>
> Cc: novac at his.com, capitalastronomers at yahoogroups.com
> Date: Wednesday, October 21, 2009, 8:02 PM
> 
> 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
> collimating.
> 
> Jerry
> 
> 
> > -----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?
> > 
> 
>