RE: [ATM] 40" mirror some ideas

["Thomas" <tomjan@ozemail.com.au>]

Jean-Guy,

Not a bad sphere at all! What caused the centeral hole?

Clear skies,
Thomas Janstrom
http://www.tjanstrom.com
http://www.norsewines.com.au
"Your nobody untill you've been ignored by your seventh cranio-facial
nerve."


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of Jean-Guy Moreau
Sent: Monday, 27 December 2004 3:07 AM
To: Ken Lowther; atm@atmlist.net
Subject: 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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