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03-20-2011, 04:06 AM   #1
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KD100 + Pentax 18-135mm lens

I just bought a a new 18-135mm digital lens for my KD100. I had been using an old 28-200 optical lens. The problem that I am having is that I cannot get the autofocus to work at all on the new lens, but it still works on my old optical lens fine. Anyone have any ideas on how I troubleshoot this issue? I cannot find documentation that deals with the matter. Thanks in advance.

03-20-2011, 04:41 AM   #2
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Hi, if i remember right the new 18-135 only has autofocus (SDM) in the lens. The K100D dont support that. The K100Ds and newer cameras support SDM.

/Anders

Last edited by BluesDeluxe; 03-20-2011 at 04:57 AM.
03-20-2011, 01:02 PM   #3
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QuoteOriginally posted by BluesDeluxe Quote
Hi, if i remember right the new 18-135 only has autofocus (SDM) in the lens. The K100D dont support that. The K100Ds and newer cameras support SDM.

/Anders
I do believe that is correct. The K100D only has a screwdrive AF system and the 18-135 has no screwdrive.
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