Archived posting to the Leica Users Group, 2001/04/14

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Subject: Re: [Leica] 223xxxx DR and 224xxxx Rigid Mount
From: SthRosner@aol.com
Date: Sat, 14 Apr 2001 11:49:01 EDT
 
Roland:

Identical optically. Just for kicks, look on the focussing mount of the Rigid 
just to the right of the "m" signifying the meters scale for two digits. They 
will indicate the exact focal length of that particular lens. If the numerals 
are "19" it means that the exact focal length of that lens is 51.9mm. 51.9 is 
the exact focal length of every DR. But even if the exact focal lengths are 
slightly different, the performance of the two lenses should be identical, 
assuming that both are within the same production tolerances.

LaK 9