Joe, I get the exact same behavior with my DA* 16-50 on my new K10D when the lens is set at 16mm. At longer focal lengths, the lens focuses just fine out to infinity.
Interestingly enough, 2+ meters is the hyperfocal distance for a 16mm lens set at F5.6 and a circle of confusion of 0.02mm according to this calculator: http://www.nikonians.org/html/resources/guides/dof/hyperfocal2.html I wonder if a 16mm F2.8 lens pushes the performance limits of the SAFOX system. It seems to me that the system my just "give up" and set the lens to a safe hyperfocal distance. This would be a "back-door" method to obtain decent (but not stellar) results. Probably not, but it's a thought.... ---jtainter jtainter at mindspring.com wrote--- When I mount the DA* 16-50 F2.8 on the K20D and focus on something far away, the autofocus will move the focus point to just short of the 2 m. mark. It won't focus to the infinity mark. If I manually focus to infinity, distant parts of a scene noticeably sharpen up. If I zoom to 50 mm, the lens autofocuses to infinity just fine. The lens works just fine on my K10D. Does anyone know if/how the K20D's autofocus adjust works for zoom lenses that focus correctly at one end of the zoom range, but not at the other end? I suspect that I have a defective K20D, and that I have to send it to Pentax. Thanks, Joe -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
