Archived posting to the Leica Users Group, 1996/12/06
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> Realistically, the extra contacts on the body will not have any future use,
> unless they have a present use. I doubt that a company (even Leica) would
> offer retroactive fitting of a function without having it in their
> brochures.
The latest Leica Views which I received only a few days ago says that
one of the functions of the contacts is to communicate information
from a ROM in the lens to the processor in the camera. The only
example of information to be communicated that it mentioned, I think,
was focal length. It suggested that the camera could direct a smart
flash to change it's angle of dispersal since the camera would know the
focal length of the lens from the ROM.
It also mentioned that older Leica R lenses could be retrofitted with
the ROM for a small charge.
Seems like a weak explanation, though. They have a bunch of contacts
there. Leica M seems to communicate the focal length of the lens to
the camera with no contacts. There must be a better explanation.
--Jim Dempsey--
jjd@bbn.com
http://frontdoor.bbn.com/users/jjd