Mehrdad Sadat wrote:
> none usm lenses use the motor inside the camera body!!
>
> _____________________________________
> Thanks, Mehrdad
Huh? How do they connect this motor to the lens? They don't because
there is no focus motor in the body.
Prior to USM, Canon used micromotors and something called arc form
drive. All in the lenses. They are generally slow and noisy.
Bob
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Everybody has a photographic memory. Some just don't have any film.
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