My Pentax 17-70 f/4 "main lens" has decided that it doesn't want to autofocus anymore, on either of the Pentax cameras in the household. Cleaning the contacts on the back of the lens had no effect. Other lenses are working normally. Can this be repaired, or should I start looking for a replacement? Rick

It's it screw drive or sdm? On January 20, 2026 8:15:04 AM PST, Rick Womer <rickpics14@gmail.com> wrote: >My Pentax 17-70 f/4 "main lens" has decided that it doesn't want to >autofocus anymore, on either of the Pentax cameras in the household. >Cleaning the contacts on the back of the lens had no effect. Other lenses >are working normally. > >Can this be repaired, or should I start looking for a replacement? > >Rick >-- >%(real_name)s Pentax-Discuss Mail List >To unsubscribe send an email to pdml-leave@pdml.net >to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

Larry, It’s an SDM. Rick > On Jan 20, 2026, at 12:49 PM, lrc@red4est.com wrote: > > It's it screw drive or sdm? > > On January 20, 2026 8:15:04 AM PST, Rick Womer <rickpics14@gmail.com> wrote: >> My Pentax 17-70 f/4 "main lens" has decided that it doesn't want to >> autofocus anymore, on either of the Pentax cameras in the household. >> Cleaning the contacts on the back of the lens had no effect. Other lenses >> are working normally. >> >> Can this be repaired, or should I start looking for a replacement? >> >> Rick >> -- >> %(real_name)s Pentax-Discuss Mail List >> To unsubscribe send an email to pdml-leave@pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >> > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > -- > %(real_name)s Pentax-Discuss Mail List > To unsubscribe send an email to pdml-leave@pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

My 16-50 will "stop working" if I haven't used it for a while. Leaving it on my camera, powered up, for a while will usually wake it back up. I have to keep trying to autofocus with it and eventually it will come back from the dead. On 2026-01-20 14:10, Rick Womer wrote: > Larry, > > It’s an SDM. > > Rick > >> On Jan 20, 2026, at 12:49 PM, lrc@red4est.com wrote: >> >> It's it screw drive or sdm? >> >> On January 20, 2026 8:15:04 AM PST, Rick Womer <rickpics14@gmail.com> >> wrote: >>> My Pentax 17-70 f/4 "main lens" has decided that it doesn't want to >>> autofocus anymore, on either of the Pentax cameras in the household. >>> Cleaning the contacts on the back of the lens had no effect. Other >>> lenses >>> are working normally. >>> >>> Can this be repaired, or should I start looking for a replacement? >>> >>> Rick >>> -- >>> %(real_name)s Pentax-Discuss Mail List >>> To unsubscribe send an email to pdml-leave@pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above >>> and follow the directions. >>> >> >> -- >> Sent from my Android device with K-9 Mail. Please excuse my brevity. >> -- >> %(real_name)s Pentax-Discuss Mail List >> To unsubscribe send an email to pdml-leave@pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > -- > %(real_name)s Pentax-Discuss Mail List > To unsubscribe send an email to pdml-leave@pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- Larry Colen LRC@red4est.com http://red4est.com/lrc