Archived posting to the Leica Users Group, 1998/06/02

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Subject: Re: [Leica] Leitz and Leica Glass
From: TEAShea@aol.com
Date: Wed, 3 Jun 1998 01:07:54 EDT

<< Glass is like plastic, brass or steel.  Surely nobody
 cares whether Leica mined their own iron ore or drilled
 for their own oil? >>

Optical glass is not simply a commodity.  They are thousands of types of
optical glass.  In one lens, Leica may use several different types of glass
for different elements.  Each has its own use.  While the source is not
critical as long as the glass meets the designer's requirements, it is an
interesting question.

Tom Shea