Why a new physical mount, then? Surely they could do the electronics with a serial protocol, which would require, at minimum, ground, power, and signal: three contacts.
As I understand it, the EOS mount is much different mechanically from the old FD mount. Wider throat. Are other factors at work?
Mark Roberts wrote:
The real reason for the new lens mount (for Canon in the change to EOS
and for Nikon if this latest rumor proves to be based on fact) is the
change to completely electronic control of all lens functions -
aperture, zoom, focus and anything else they decide to add (image
stabilization, for example).
