There's really no way of knowing when the offending lens groups were assembled, especially if they were made ahead of time and QC didn't catch them they could be salted throughout the production run.
Adam Maas wrote: > Manufacturing defect, yes, early samples, no. I'm seeing reports of > recent lenses with the same issue over on the flickr Pentax group I > moderate. > > -Adam > > On Wed, Jun 4, 2008 at 6:15 AM, Paul Stenquist <[EMAIL PROTECTED]> wrote: > >> The uneven focus on some DA* 16-50 lenses is a manufacturing defect >> that plagued some early samples of this lens. I don't know if it can >> be fixed. You should have returned it to the store where you bought >> it. Hopefully, Pentax will replace it. >> Paul >> >> On Jun 4, 2008, at 12:13 AM, Mark Erickson wrote: >> >> >>> I hate to be a buzzkill, but.... >>> >>> I sent an FA* 300mm F4.5 lens back to Colorado for repair a few >>> years ago. >>> It came back to me horrible mis-calibrated (blurry at all >>> apertures), so I >>> sent it back. The second time I got it back it was dialed in and very >>> sharp. >>> >>> I sent my DA* 16-50 back this spring due to uneven sharpness across >>> the >>> frame. It came back worse than when I sent it. So it's back in >>> Colorado >>> again. I'm hoping it comes back in better condition. >>> >>> Maybe I'm a "second time's the charm" guy.... >>> >>> >>> Jack wrote: >>> >>>> Nor I, Paul. >>>> >>>> Jack >>>> >>>> >>>> >>>>> Ken wrote: >>>>> >>>>> >>>>>> Same here Paul. >>>>>> >>>>>> Paul wrote: >>>>>> >>>>>>> I've never had a bad service experience with Pentax >>>>>>> Colorado. It seems they know what they're doing. >>>>>>> Paul >>>>>>> >>> -- >>> 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. >> >> > > > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- 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.
