Originally Posted by ghost
I would never buy this lens per say, but are they really saving that much money by not including a screw drive? I thought Pentax was all about backwards compatibility. guess not. (I know you can still use manual focus but it would be nice to have the option of auto focusing on a brand new lens)
OLDER cameras using NEWER lenses is FORWARDS compatibility. The newer bodies can still use the older lenses with the screw focus.