Thread: GSO centre spot. Muy bueno! Very happy!
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Old 01-02-2005, 02:12 PM
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ballaratdragons (Ken)
The 'DRAGON MAN'

ballaratdragons is offline 		 
Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
Janos,

Your mirror is not made of window glass.

It is BK7 optical grade glass.

Yes, cheaper than Pyrex, easier to grind and polish than Pyrex, but definately a damn lot dearer and harder than 'window' glass.
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