I understand your frustration, Joseph. But I think that even parfocal zoom lenses (as opposed to varifocal ones) don't focus the same at all focal lengths. Expecting them to be perfect, even the high end ones, is putting to much faith on technology. On the other hand, no AF system is perfect. AF can be convenient, and even faster than manual focus most of the time, but expecting it to be right on the money all the time is like thinking that auto exposure always leads to perfect results. So, if I were you, I wouldn't put much faith on the results of the lens-body calibration when they return from Pentax. Surely they will be able to achieve a better compromise than a user can do at home using focusing charts, but that's all. I think you should try Bill's suggestion, it seems to make sense and see if results are more consistent.
Carlos -- 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.
