On Mar 9, 2011, at 7:36 PM, <[email protected]> wrote: > Just before I boxed up this lens for shipping to C R I S for repair I thought > I'd pop it back onto my K20D just to see if it would auto focus as it had not > consistently auto focused for quite some time (bought new in 2/09) - and > guess what - it began to auto focus, intermittently at first, and the longer > it stayed on the camera body, the less frequently it refused to auto focus. > > It seems (?) to be auto focusing alright at the moment. > > I had previously done all the usual - check contacts, switched the lens > auto/manual focus switch etc all to no avail. > > Any ideas out there as to what the heck is going on with this lens? > > Doesn't make sense to sent it in for repair since it now appears to be > functioning ok, but I don't know how it will perform the next time I go to > use it. It is probably my least used lens. > > I remember some discussion here about the lens needing to be on the camera > body for awhile for it to auto function properly - something about charging > IIRC.
I remember hearing something about SDM lenses needing a few minutes to power up. That doesn't seem to be true of any of mine. I do make a point of using them all from time to time. My 60-250 and 16-50 both get a lot of use just as a matter of need. But I make an effort to mount my least-used 50-135 from time to time as well, just to give it a workout. Paul > > Kenneth Waller > http://www.pentaxphotogallery.com/kennethwaller > > -- > 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.
