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 Wthrich 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






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