It appears that older SDM motors require regular exercise. http://bangmedia.no/pentax/sdmfix/
The thread showing that it works: http://www.dpreview.com/forums/thread/3897428 Not for the faint of heart, however. On Mon, Oct 26, 2015 at 2:01 PM, Ken Hauck <[email protected]> wrote: > Hello PDML list, > > I have seen lots of discussion on the list about problems with SDM > autofocusing on the 16-50/2.8 DA* lens. Over the last year or so I became > enabled with a K-3, 16-50/2.8 DA* and 50-135/2.8 DA*. I last shot with the > 16-50 in August and it was fine, when I tried it yesterday the autofocusing > wasn’t working. My 50-135 autofocuses correctly so the camera seems fine. > > Does anyone have any comments about things to try to see if the SDM can be > revived before I send it in for service? Any other helpful comments? Maybe > some sympathy? :-) > > Thanks, > Ken Hauck > -- > 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. -- Life is too short to put up with bad bokeh. -- 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.
