[Leica] R lenses on the M

[vick.ko at sympatico.ca (Vick Ko)]

  I appreciate all your input

...Vick

On 9/29/2010 2:36 AM, Tom Schofield wrote:
> Actually, I think 2cam vs. 3 cam isn't the issue.  There are two lens 
> mount variations which come in to play.  Third Cam lenses, which do not 
> have the first two SL cams, have a ridge all the way around the lens mount 
> that keeps it from being mounted on a camera that requires those first two 
> cams.  (e.g. I had a 60mm R-cam lens that would not mount on an early SL 
> bellows, so I sold it and bought a 3-cam version.)  The second variation 
> is that the upper bayonet claw on an R or SL2 body is shorter than the 
> corresponding claw on an SL.  This  allows some superwides which would 
> interfere with the SL mirror, to mount on an SL2 but not an SL.  The 
> mirror swing was one of the main differences between the SL2 and SL.  It 
> is probably grinding down that upper claw to make it match the SL2, that 
> they were referring to on Nemeg.
>
> So, in addition to there being 1 cam, 2 cam, 3 cam, 3d cam and ROM mounts, 
> you should add SL and non-SL compatible variations of the 2 cam and 3 cam 
> lenses, for a total of 7 different Leica  reflex lens mount variations!
>
> Which gets back to it being cheaper and easier to buy Adorama's Flashpoint 
> brand R to M adapter, which I can tell you from experience, does work for 
> mounting Leica R 3-cam superwides on an M.  (To verify the above, I 
> looked, and the upper claw on the Adorama adapter does match the SL2 
> rather than the SL.)
>
> Doug, oh great R guru, do you have further enlightenment?
>
> Tom (spending waaaay too much time figuring out this post!)
>
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