Archived posting to the Leica Users Group, 2000/02/21

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Subject: Re: [Leica] Re: comment on: Heliar 15 comments/ film spacing
From: "Henning J. Wulff" <henningw@archiphoto.com>
Date: Mon, 21 Feb 2000 20:48:15 -0800

At 5:09 PM -0800 2/21/00, Jim Brick wrote:
>At 03:58 PM 2/21/00 -0800, Evilboy wrote:
>>I've had this spacing problem w/ the russian 20/5,6 as well. At first I
>>thought it was the body til I checked negatives shot w/ other lenses.
>>It makes it very hard to cut your negatives into strips.
>>-Bern
>
>This is a very well known feature of very wide angle lenses. The closer the
>rear element is to the film, the winder the spread on the film. Thicker
>emulsion films will be more pronounced than thinner emulsion films.
>
>R lenses do not have this problem because they are retrofocus designs. The
>rear element is still way out in front of the mirror. A long ways away in
>terms of light ray angles.
>
>Jim

Properly done, your 36 shot Hologon filmstrip can look like one negative.
Actually, there is about 1/2mm left between shots on M bodies.

   *            Henning J. Wulff
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