Thread: 8 inch Dobsonian - Saxon, Skywatcher, OzScopes, Bintel
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  #12  
Old 10-03-2014, 09:21 AM
astro_nutt
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Join Date: Mar 2005
Location: Melbourne
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Hi Alan.
Regarding how you can if a mirror is made from Pyrex. Looking at the mirror from the side, if it's green, it's glass. If it's white-ish, it's Pyrex.
Cheers!
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