I would look closely. I never test lenses. But I have taken advantage of the focal point adjustment on the K20D. It's worthwhile. And when this lens showed aberrant behavior, I tested it further. I could have settled for what was essentially a defective lens. And if the chips fell right I may never have noticed it in real world shooting. You can always blame it on camera shake or simply missing the mark on the focal point. But there are times when it's best to know that one's equipment works correctly. Or one can choose blissful ignorance. Paul On Apr 8, 2008, at 9:26 PM, David Savage wrote: > I'm forced to agree. > > This is what comes from using lenses on a test bed instead of in the > real world. > > I only ever resort to this kinda' testing if my real world shots show > optical deficiencies. > > Cheers, > > Dave > > > At 08:50 AM 9/04/2008, Godfrey DiGiorgi wrote: >> Gads, I'm beginning to believe that I have the only non-defective >> DA*16-50 in captivity. Perhaps I shouldn't look too closely at >> it! ;-) >> >> G >> >> On Apr 8, 2008, at 4:56 PM, [EMAIL PROTECTED] wrote: >>> I think the DA* 16-50/2.8 is an aberration. All my other lenses >>> check out quite nicely. Some adjustment dials them in more >>> precisely, but they're all within acceptable range. Apparentlly >>> there's some problem involved in the manufacture of the DA* 16-50 >>> that sometimes results in a plane of focus that's not uniform. >>> That's a different kind of problem than front focus or back focus. >>> It can't be corrected with the controls or even with normal service >>> procedures. That being said, I'm not sure that a lot of shortcuts >>> aren't being taken in manufacturing these days. > > > -- > 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.
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