Loose barrels on AF lenses have been discussed since the "F" days. I first heard of it (and noticed on mine) in the "FA" era with my PZ-1p. Supposed to have no impact on image quality. The official reason for this is the AF motors did not have the power to focus a lens against the drag of what used to be tight brass on brass movement. The very thing we loved about the older lenses, the silky smooth focusing movement, had to go for AF to work.
On Nov 15, 2012, at 08:51 , Larry Colen wrote: > I was cleaning my 16-50 this morning and noticed an odd clicking. It turns > out that the front element, actually the whole barrel that the front element > is in, will rock back and forth a small, but noticeable amount. Is this > normal? Does this happen with other people's lenses? I'm going to hope that > since there isn't usually lateral pressure on it that it pretty much stays > centered. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
