M8 + Leitz Summicron-C 40mm f/2???

[ho_co]

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LCT--

As long as things are working for you, that's fine.

 

The place to tell whether the roller is centered is the front of the camera. So once again:

 

Remove the body cap.

 

Set the camera on a horizontal surface.

 

Draw an imagined vertical line up from the bottom plate bisecting the lens opening. If that line runs through the center of the focus-tracking roller, then the roller is "centered" in my terminology. If the midpoint of the roller is to the left or to the right of that line, then the roller is not centered and will not track C lenses properly.

 

Another way to say the same thing, but one which doesn't work with current models: Remember that at the top of the bayonet ring of earlier M bodies there is a screw hole which Leica would fill with a black wax seal and stamp with an "L" to indicate a camera repaired by Leica? The roller would appear directly under that wax marker on most but not all M cameras. If both are on a diameter of the lens opening, the C lenses will work fine; if not, the C lenses will not work on that body.

 

(If a Leica body works with one C lens, it will work with all. Epson cameras are of no interest here.)

 

--HC

[lct]

...Draw an imagined vertical line up from the bottom plate bisecting the lens opening. If that line runs through the center of the focus-tracking roller, then the roller is "centered" in my terminology...If a Leica body works with one C lens, it will work with all. Epson cameras are of no interest here...

In fact it doesn't work with the Epson's the roller of which is not centered at all (see below) but other variables may differ like the length of the arm or the size of the roller.

I'm travelling now but i'll try your tip with my Ms when i come back. Thanks.

 

 

[pfogle]

In fact it doesn't work with the Epson's the roller of which is not centered at all (see below) but other variables may differ like the length of the arm or the size of the roller.

I'm travelling now but i'll try your tip with my Ms when i come back. Thanks.

Do the 40mm 'crons all have the sloping cam?

 

I have the CLE version of the Rokkor, and it has the classic double focus helix (ie one for the optics, and a 50mm one for the focus cam only), so the cam is parallel, not sloping. That eliminates any problem from centering. I use it on my R-D1 with no problems.

[lct]

Do the 40mm 'crons all have the sloping cam? I have the CLE version of the Rokkor, and it has the classic double focus helix (ie one for the optics, and a 50mm one for the focus cam only), so the cam is parallel, not sloping. That eliminates any problem from centering. I use it on my R-D1 with no problems.

Funnily enough my CLE version won't focus accurately with the Epson's but i have no problems with the 'crons. To my knowlege all the latters have a sloping cam, at least it's true for my 1972, 1973 and 1974 copies.

[ho_co]

Phil--

The Leica-made Summicron-C and Elmar-C both had sloping cams. That much I'm certain of.

 

I'm almost sure that the Rokkor which was sold with the Leitz/Minolta CL also had a sloping cam.

 

I believe all CLE lenses had the standard flat cam as you said.

 

--HC