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tornado33
24-02-2007, 07:25 PM
Hi
After a great talk on Telescope Making at the Newcastle Astro Society meeting last night, I
found this company that makes super lightweight but stiff telescope mirror blanks
http://www.hextek.com/
A big lotto win would see me getting one in short order :)
Scott

rmcpb
24-02-2007, 08:44 PM
Only a Lotto win?? You may need a bit more me thinks :)

h0ughy
24-02-2007, 09:23 PM
you go and buy It and I will bring the camera Scott!!!!!!!

tornado33
24-02-2007, 09:51 PM
Will do :)

Orion
25-02-2007, 08:29 AM
Yes Denis knows his stuff. It was a good talk I thoroughly enjoyed it.
I'm just wondering if these hollow mirrors are as good as solid Pyrex mirrors?

monoxide
25-02-2007, 04:19 PM
well i suppose if its hollow its not going to take as long to cool as a solid lump of pyrex, but the real performance is in the figuring not the substrate