Archived posting to the Leica Users Group, 1997/05/16

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Subject: Re[2]: 90mm Summicron Question
From: seungmin@luxmail.luxcom.com
Date: Fri, 16 May 97 14:46:54 PST
 
     Hi,
     
      It is my understanding that there are some German made 90 M-Rokkor 
     for CLE.  Am I wrong?
     
     Regards,
     David

______________________________ Reply Separator _________________________________
Subject: Re: 90mm Summicron Question
Author:  leica-users@mejac.palo-alto.ca.us at Internetmail
Date:    5/16/97 1:49 PM


Gerard Captijn wrote:
> 
     
> The 90mmf/4 Rokkor was a lens produced by Leitz Wetzlar. Although its
> optical construction was identical to todays Elmarit-M, its performance is 
> comparable to the   Tele-Elmarit-M.
> 
     
The 90/4 Rokkor M for the CLE is a different lens than the 90/4 for the 
CL.  While both are 4 element and similar, the diagrams which I have 
seem to show slightly different formulas through different element 
curvatures.  The differences which I am aware of are as follows:
   90/4 Elmar for CL 90/4 M Rokkor for CLE
     
manufacture    Germany   "Made in Japan" 
cam    sharp curve  standard M cam
filters    Series 5.5  40.5
coating    single   multi
lable    Elmar C   "M-Rokkor"
     
     
Stephen Gandy