50-135 SDM woes

Started Mar 30, 2009 | Discussions thread
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psu28k
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50-135 SDM woes
Mar 30, 2009

After several months of flawless operation, the SDM drive on my 50-135 only moves the lens a mm or so when trying to focus. It works wonderfully otherwise (and works fine with a screw drive on an older body). Any hints or suggestions before I send it in to pentax? I purchased the lens used, so I don't think it'll be covered by warrenty.

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