Archived posting to the Leica Users Group, 2000/05/18

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Subject: Re: [Leica] Re: Noctilux for the R series?
From: "Henning J. Wulff" <>
Date: Thu, 18 May 2000 19:26:44 -0700

At 10:31 AM -1100 5/18/00, Takeshi Hashimoto wrote:
>On Thu, 18 May 2000 22:08:38   Doug Richardson wrote:
>>"Takeshi Hashimoto" <> wrote:
>>>Would it not be more useful to have a Noctilux for the R series?
>>I remember asking Ewin Puts that question a year ago when he was
>>lecturing at Solms. I've lost my notes, so am relying on my memory,
>>but I think he said that the R mount is not wide enough to cope with
>>an f1 lens.
>>Doug Richardson
>Considering that the M aperture is smaller, that's probably untrue, unless
>the mirror back-focus of the SLR requires a design with a considerably
>larger (diameter) rear element. I'm not sure whether the existing Noct
>design could fit and clear the mirror.

a) The existing Noctilux design would not clear the mirror.
b) the necessary re-design of the lens, making it a retrofocus a la Canon
would probably necessitate a larger rear element, although not necessarily.
If you want a smaller rear element, other compromises will clamour to make
themselves noticed.

   *            Henning J. Wulff
  /|\      Wulff Photography & Design
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