Archived posting to the Leica Users Group, 2002/02/14

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Subject: Re: [Leica] Visoflex Lenses
From: Henning Wulff <henningw@archiphoto.com>
Date: Thu, 14 Feb 2002 23:06:39 -0800
References: <NEBBJDFBIKOBILIKPPBNEENJIHAA.red735i@earthlink.net>

At 8:38 PM -0800 2/14/02, Frank Filippone wrote:
>I need a quickie lesson in Visoflex lenses.... Specifically, is there a
>preset diaphragm?  Is the lens open to full aperture for focusing, then you
>turn some type of ring, to select your taking aperture?
>
>Is there any difference between lenses in their operation?  Any lenses NOT
>preset?

Most lenses designed for use principally on the Visoflex II and III 
were provided with preset diaphragms. The 6.8 Telyts were some of the 
few exceptions. One lens, the 90/2 Summicron was even supplied with 
or without a preset diaphragm, depending on whether you intended to 
use it mainly on the Visoflex or directly on the camera with 
rangefinder coupling. Earlier lenses such as the 200/4.5 had neither 
preset diaphragms nor non-rotating focussing movements, so the 
diaphragm ring rotated as you focussed, and if the diaphragm ring was 
a bit stiff, you couldn't maintain focus as you stopped down after 
focussing. Not handy.

- -- 
    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com
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In reply to: Message from "Frank Filippone" <red735i@earthlink.net> ([Leica] Visoflex Lenses)