Archived posting to the Leica Users Group, 1996/07/17

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To: leica-users@mejac.palo-alto.ca.us
Subject: Re: computer-designed lenses
From: Marc James Small <msmall@roanoke.infi.net>
Date: Wed, 17 Jul 1996 12:27:21 -0400

Roger

Let's put the entire quotation into cyber-space

"It might therefore be worth mentioning, that at Leitz Wetzlar one of the
very first programme controlled computers, ESPECIALLY DESIGNED FOR OPTICAL
CALCULATIONS, was installed as early as 1951"   (Emphasis added).
Rogliatti, Leica and Leicaflex Lenses, 2nd edition, p. 8.

Your suggestion that this was used for book-keeping baffles me -- why would
Leitz, of all folks, take a computer designed for lens formulation and use
this for book-keeping?

Further, Emil Keller -- who worked for Leitz at this point and who was great
friends with the family -- has also related that computer-produced lens
designs began in the early 1950's.  I believe the 2/50 Summicron was
probably the final design conceived without the aid of computers.

Marc



Marc James Small  FAX:  +540/343-7315
Thalla, a Bhallagair!