On Jul 11, 2005, at 7:03 AM, mike wilson wrote:

The problem seems to be that licensing does not occur, reverse engineering does. And Canon changes the engineering unpredictably, causing heretofore working lens series to become unfunctional. If that's the scenario, who
is providing the poor customer service?


They can't be changing that much, they aren't having compatability problems
within their own system, that I have heard of.


Doesn't need much of a change to sofware to make a lens not work properly. You could even have both types, with an interrogater. "Are you a Canon lens?" If yes, behave this way, if not behave that way.

If Canon's changes were so unpredictable and so difficult to keep in compliance with, how come the same Canon lens produced in 1985 works flawlessly on the latest Canon EOS body, despite 20 years of unpredictable body changes and no change to the lens at all?

Godfrey

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