Archived posting to the Leica Users Group, 1999/08/15

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Subject: Re: [Leica] m2
From: "Ken Iisaka" <kiisaka@ibm.net>
Date: Sun, 15 Aug 1999 08:06:47 -0700
 
> Can someone tell me why they can't make eyeglass lens out of sapphire. I
have a
> Cyma watch with a sapphire crystal and in two years of hard wear NO
scratches.
> But I too will kill my eyeglasses in 3-6 mnts.
> Cheers Wilber

Cost.  A crystal big enough to be cut and ground into eyeglasses are
horrendously expensive, not to mention the cost of grinding and polishing
with diamond!!!