Archived posting to the Leica Users Group, 1996/04/13

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Subject: Re: M lens for 645 format
From: Michael Reichmann <>
Date: Sat, 13 Apr 1996 08:29:51 -0400

Another approach would be to use the 164164K Visoflex focusing adaptor for
the 135mm f/4.0 Tele-Elmar and adapt it to a Mamiya mount.  I'm sure that a
good machinist could do this, but at what cost?


At 02:05 AM 13/04/96 +0800, you wrote:
>Hi, Tom,
>So far as I understand, only those M lenses from 90mm upwards designed for
>visoflex use which have detachable lens unit can be adopted for use in the
>Mamiya 645. Some people said the Elmar M65mm f/3.5 can also be used but this
>lens is very difficult to find now.
>The idea is very simple - unscrew the lens unit from its original focusing
>tube and attach it to a new focusing tube which is suitably modified to the
>correct length and having, of course, a Mamiya mount for attaching it to the
>camera body. If you want to use the lens again on the M body, simply re-fit
>the lens unit to its original tube again.
>Here in Hong Kong, I have it done by my friend who is an expert in
>converting these equipment. My Elmar 135 is attached to a Tamron 135mm
>focusing tube, converted with a screw mount in front for attaching the lens
>unit and a bayonet mount at the rear for fitting to the Mamiya body.
>The beautiful thing of it is that I can still use the automatic exposure of
>the camera (fitted with an AE finder).  The slight inconvenience is that I
>have to stop down to the desired aperture for the exposure measurement.
>I spent about HK$6000 for the lens and the conversion tube. I consider it
>extremely worthy of the money spent because the original Mamiya A150mm f/2.8
>costs up to HK$9000 and the quality - you can imagine which is the winner.
>I'll talk to you about the conversion of the 200mm later.
>TK Chan
>>You're not really have had M lenses adapted to a Mamiya
>>645?  By whom?  I will buy an adapter from him/her immediately!!!!  I have
>>an older Mamiya 645 1000S and would love to see Leica lenses used on it
>>but I could never imagine it in my wildest dreams!  I have the tiny CL and
>>the incredible 40mm f/2.0 Summicron-C lens and know it is a lens of
>>monumental quality despite it's size.  It's a shame to "waste" that
>>outstanding rendition on a tiny 35mm negative only!  I have made some
>>stunning transparencies from this lens and salivate like Pavlov's dogs
>>just THINKING about seeing the richness and saturation on a 120
>>transparency!!!  Help me!!!  Please........point me to the person who helped 
>>adapt your M lenses to the 645!!!
>>Best regards,
>>TYom Hodge

Replies: Reply from "joe b." <> (Re: M lens for 645 format)