Archived posting to the Leica Users Group, 2009/05/22

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Subject: [Leica] 90 APO Asph on M8
From: henningw at archiphoto.com (Henning Wulff)
Date: Fri, 22 May 2009 23:12:51 -0700
References: <mailman.912.1243041579.1139.lug@leica-users.org> <7515F759-A92D-43A6-AF64-2FD180833ECE@netvigator.com> <63BD3033-C034-4FA1-B8DC-8796E2DE4320@gmail.com> <p0623090ec63d3f25864a@[10.0.1.199]> <CEB4FEFD-6438-422F-B377-9735901AB35C@gmail.com>

The problem is that not only is the front to back position (which you 
adjusted with the hex key) critical, but also the distance from the 
pivot point of the arm to the contact point where the roller hits the 
lens cam. That takes additional adjustment. But if it works for you...


>Too late. :P Already did it with the 90 pre AA I had; tweaked a 
>little for the 50/1.5 nokton, and now everything's bang on.
>
>Actually, I admit it's not the first time I've played with focusing 
>alignment. I've had to tweak the submirror and mirror rest position 
>on most of my Nikons for critical MF, as well as adding a shim or 
>two to the focusing screen. First time with an RF though, but I 
>suspect the concept is similar in principle.
>
>Ming

-- 

    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw at archiphoto.com
  |[ ]|     http://www.archiphoto.com


In reply to: Message from cummer at netvigator.com (H&ECummer) ([Leica] 90 APO Asph on M8)
Message from mingthein at gmail.com (Thein Onn Ming) ([Leica] 90 APO Asph on M8)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] 90 APO Asph on M8)
Message from mingthein at gmail.com (Thein Onn Ming) ([Leica] 90 APO Asph on M8)