I reported a few days ago that my DA* 16-50 F2.8 will not autofocus to infinity at 16 mm on my K20D. It works just fine if I zoom to 50 mm. The lens works just fine also on my K10D.
Since I leave for Italy tomorrow, Calumet kindly sent me a new K20D overnight. So I did the initial set up, put on the DA* 16-50, set it to 16 mm, found a suitable distant subject and... nothing has changed. It still won't focus beyond about 2 m when the lens is zoomed to 16 mm. Well, a little has changed. It will now focus to infinity sometimes at 16 mm, but not consistently. I have found, though, that if I set the lens to 18 mm it autofocuses to infinity just fine. Back to 16 mm and it won't. So I guess that means that my DA* 16-50 is defective rather than the K20D. Since my DA* 50-135 arrived with a loose lens element rattling around inside, that means that my first two DA* lenses were both defective. Good show, Pentax. So now I have to decide whether to take the DA* lenses and chance losing shots taken with the 16-50, or leave the zooms at home and take the three DA limiteds. But I haven't tried those yet on the K20D. Incidentally, I emailed Pentax a few days ago to inquire about this and so far have had no response. Joe -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
