Archived posting to the Leica Users Group, 2002/03/20

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Subject: Re: [Leica] Lenses
From: Henry Ting <>
Date: Wed, 20 Mar 2002 09:25:14 -0800 (PST)

Its a fact that Leica uses "Hoya", "Cornings" and some
other source for glasses. Going to Solms, trying to
find out the source of Leica glass will not be easy. 
Besides, Leica would not tell you, just as Minolta
used to be their OEM for Leica Rs, they don't
advertise it either.

- --- "Dr. Elliot Puritz" <>
> I would be very interested in seeing what Erwin says
> about Leica glass being
> obtained from different sources, and the coatings
> being modified  according
> to the properties of the glass.  In his book Erwin
> is very clear about the
> quality control that Leica uses in the manufacture
> of their lenses, and the
> pains that they take to insure that the glass used
> is of such a nature as to
> assure that the computer design of the lens is in
> fact what is achieved in
> the final result.  If the glass is different from
> one "batch" of lenses to
> another ( naturally of the same type, e.g., the 50
> summilux for example )
> then the final result might not be consistent. 
> Anyone going to Solms soon
> for one of the Leica courses?  Would be a great
> question to ask at the
> factory.
> Elliot
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Replies: Reply from "Dr. Elliot Puritz" <> (Re: [Leica] Lenses)