----- Original Message ----- From: "Toralf Lund"
Subject: Re: Pentax Future? What's next for Pentax...
Furthermore, I suspect Canon chose in-lens motors because they had decided that there would be no mechanical coupling whatsoever between the lens an body, i.e. not based on AF considerations as such. May or may not have been a good idea; that's really a different discussion.
One of the advantages of in lens AF motors that hasn't been touched on, and is pretty important is that the AF motor can be matched to the needs of the lens.
With in body motors, you get a one size fits all approach, which means that you either have a motor that is way overpowered most of the time (look at the AF motor on an F5 sometime), or an AF motor that is adequate sometimes, and underpowered at other times.
Canon felt that no mechanical couplings between camera and lens was a good idea for a variety of reasons, including being able to match the AF motor to the needs of the lens.
William Robb
