on 24.06.04 8:49, keller.schaefer at [EMAIL PROTECTED] wrote: > So apparently, the the AF system takes into account the focal length, when > calculating how much it has to displace the lens (or parts of it) to achieve > focus. Somewhere in the lens the displacement/distance curve for each focal > length must be stored, so when the AF system determines that the focus needs > to > be corrected from say 10m to 5m, the lens reports back "as I am set to 50mm, > you need to turn the AF shaft x turns... > ...or something to that effect. And that's probably why some 3rd party lenses focuses noticably slower having to do a few more "to and from" spins than genuine Pentax equivalents.
-- Best Regards Sylwek
