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Re: [ATM] 40" mirror some ideas


----- Original Message ----- 
From: "Ken Lowther" <hermit@outofoptions.org>
 
> I don't remember seeing that one of these have been successfully 
> figured.  Did I
> miss that.

please see

http://www.cablevision.qc.ca/astro/18.75_near_sphere.jpg

a 18" mirror supported only by the center hole in the backplate,
picture was taken with a 300D camera and 135mm lens,
swirls are from improper polishing with a driven lap...

Jean-Guy
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