Archived posting to the Leica Users Group, 1999/01/25

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Subject: Re: [Leica] the 50s again
From: Dennis Painter <dpainter@bigfoot.com>
Date: Mon, 25 Jan 1999 21:55:36 -0800
 
LEICAMAN56@aol.com wrote:
> 
> In regard to the 50 DR and the "rigid" mount lenses, they are the same optical
> design.  I have heard that the Leitz factory selected the "better" performing
> lens heads for use with the DR mounts as they were to be used in more critical
> applications such as the close up range.  True or old wives' tale?  Perhaps
> Erwin could shed some light on this.
> 
> Bill Rosauer

I recall reading or hearing that the DR were selected from lensheads
that measured an actual focal length of 51.9 mm after the elements and
cells were assembled. Supposedly 51.9 mm was the focal length used in
the computation of the lens.  

I too call for Erwin on this one.

Dennis