Hate to say so John but that is how the trouble started on my 1st 16-50 (also frequent forum opinion).
After I had the sdm motor replaced, it was the first thing again so I returned it to Pentax for a NIB replacement. The 2nd 16-50 is now my always on, mainly because I like the lens but also forums say if you want to be sure your sdm motor is ok, use the lens often, both to provoke the next failure and in case it needs a regular workout. I've also read people state their belief that this whole thing is a misalignment issue at the coupling of screwdrive and sdm. Please take the latter as hearsay. If you want my opinion, make sure you return it for repair (and perhaps realignment) before the warranty runs out. Better safe than sorry. Good luck Ecke 2010/1/12 John Celio <[email protected]>: > Does anyone else notice a "warm up" period between mounting an SDM lens > and when the AF starts functioning? > > Whenever I put my 16-50 on my K10D, it takes between 5 and 15 > (guestimate) seconds for the AF to start working. I should note that I > don't use the lens very often, since my DA21 is my walk-around lens. > Could this be some sort of defect, or is it just the electronics warming > up/charging? > > John > > -- > http://www.neovenator.com > http://www.cafepress.com/jacelio > > > -- > 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. > -- 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.
