Archived posting to the Leica Users Group, 1999/04/23

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Subject: Re: [Leica] Summicron 2/50 No.:11825 chrom
From: Dennis Painter <dpainter@bigfoot.com>
Date: Fri, 23 Apr 1999 06:56:36 -0700
 
It means the focal length to the nearest tenth is 52.2 mm. Due to
manufacturing tolerances every lens' focal length can vary a bit from
the computed value. Erwin Puts posted an interesting description of how
Leica uses computers in the manufacture of their lenses to optimize the
end product.

I suppose this could be written up and put on the website.

Dennis


W. Oehms wrote:
> 
> Hi everybody,
> 
> i just bought a summicron-M 1:2/50 Nor. 11825 chrom secondhand. Built in 1993.S/N 3606387
> Behind the word feet and m (for meter) is a number No.: 22
> What does that meen?
> 
> Regards
> 
> Wolfgang
>