Mark Erickson wrote: > > Keith wrote: > >Mark Erickson wrote: > >> > >> Keith, > >> > >> The FA* lenses have the following properties: > >> > >> o) They are faster than non-FA* lenses. > > > >Speed of focusing? > > Pentax autofocus works via a motor in the camera > body. Since there aren't equivalent (i.e., same > focal length and aperture) non-FA* lenses, this question > isn't really answerable. As Bruce Dayton mentioned, > the FA* lenses have a clutch system that disengages > the manual-focus ring when you use autofocus.
Then why the statement "They are faster than non-FA* lenses?" keith
