Archived posting to the Leica Users Group, 2002/03/06

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Subject: [Leica] Leica CL 40mm Summicron on other M-mount cameras
From: Mark Langer <mlanger@ccs.carleton.ca>
Date: Wed, 06 Mar 2002 08:37:13 -0500
References: <200203060711.XAA15799@mejac.palo-alto.ca.us>

>

John,

Is this true according to your direct experience, or just from what you've heard?  I'm asking you this because last weekend I had a discussion with Reinhold Mueller on this very subject, and he answered unequivocally that the incompatibility of the 40mm
Summicron with other M cameras was just a myth.  I'm fond of the 40mm focal length (I've got an Olympus 40mm f2.8 in LTM and just got a Rollei 35 SE) and have been considering buying the 40mm Summicron for a M6.

Mark


> ------------------------------
>
> Date: Tue, 05 Mar 2002 22:47:21 -0700
> From: John Collier <jbcollier@powersurfr.com>
> Subject: Re: [Leica] Leica CL 40mm Summicron on other M-mount cameras
> Message-ID: <B8AAFB78.1AB3F%jbcollier@powersurfr.com>
> References:
>
> The answer is: a CL lens may focus correctly on a M camera...or it may not.
> The CL uses a very steep lens cam and the horizontal position of the CL's
> rangefinder roller is critical. The M lens cam is not steep and horizontal
> position of the rangefinder roller is not critical. In fact, on the M
> camera, the length of the rangefinder arm (horizontal position) is
> adjustable to fine tune focusing accuracy. So it is not unusual to have the
> rangefinder roller in slightly different horizontal positions on different M
> cameras.
>
> So the short story is that a CL lens may line up properly at infinity on one
> M camera and may not on another. Try it and see.
>
> John Collier
>
> PS: The 40/2 is a very good lens.

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Replies: Reply from "SonC (Sonny Carter)" <sonc@sonc.com> (Re: [Leica] Leica CL 40mm Summicron on other M-mount cameras)