Archived posting to the Leica Users Group, 1997/10/31

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Subject: Re: Elmarit 90mm
From: Dan Cardish <>
Date: Fri, 31 Oct 1997 15:17:29 -0500

At 12:37 PM 31-10-97 -0400, Paul wrote:
>You know those little numbers after the distance scale, which tell you 
>what the actual focal length is? When I was photographing stuff for the 
>Photo Techniques article, at one point I examined two of these lenses at 
>the same time, (both chrome), and happened to notice that one was marked 
>00 and the other 90. This means that the second one was nearly 100mm. 
>This made me wonder if there was not something different going on here as 
>far as optical formula. Both lenses looked identical.

100mm?  I thought that the 90 on the scale indicated that the actual focal
length was 90.90, or roughly 91mm.   Whether this is correct or not, what
number would appear if the actual focal length was less than 90?

Dan C.