On 12/3/2010 3:09 PM, Jim Nichols wrote:
> Well put. Leica designed the Leica M camera so that an adapter for LTM
> (thread mount) lenses is exactly 1mm.
As long as practicalities are being discussed, I should mention that mount
diameter plays a part too. The mount you
mention, many for the EOS EF mount and some others allow adapters as thin as
1mm only if the mount on the camera is of
adequately greater diameter than that of the lens.
The back part of the lens mount has to fit into an adapter that fits into the
receiving mount. (Does that sound vaguely
pornographic?)
Moose
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