The old clutch I was referring to was the one on FA* lenses where you would push or pull the focus ring to engage/disengage the AF - regardless of the switch on the body. This allowed you to leave the body on AF and choose with the lens when to use AF.
-- Best regards, Bruce Wednesday, August 8, 2007, 4:28:10 AM, you wrote: JvW> Hi Frits, JvW> On Wed, 8 Aug 2007 10:33:12 +0200 (CEST), Frits Wthrich wrote: >>Does the lens auto focus on a *istD? JvW> Yes >>If it doesn't have the old clutch, I >>assume it only can AF on the K10D and K110D and K100D? JvW> Hmm, without it, it would only work with the K10D and K100D super JvW> since those are the only two with SDM support sofar ... JvW> But the first three SDM lenses anounced (16-50, 50-135 and 60-250) JvW> will have a "dual drive" capability. JvW> For later lenses, they will reconsider that on a lens by lens basis. JvW> Regards, JvW JvW> ------------------------------------------------------------------ JvW> Jan van Wijk; http://www.dfsee.com/gallery -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net

