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Pentax smc DA* 50-135mm F2.8 ED (IF) SDM

Started Jan 31, 2015 | User reviews thread
kriztian Senior Member • Posts: 1,449
Re: Pentax smc DA* 50-135mm F2.8 ED (IF) SDM

I have had mine since 2011 anf there has never been a problem apart from  it is a Little bit slow compared to other brands. What I do is that I take it out at least once a week and focus with it back and forth using both the SDM motor as well as focus manually ( all the way ) a couple of times. I got this advice from someone at this forum.  50-135 is like a dog. You have to walk it every now and then.

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kriztian

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