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11-23-2009, 03:17 PM   #1
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50-135mm f2.8 Auto Focus goes to sleep?

I have the 50-135mm f2.8 lens. I love it. However, I've noticed that if I don't use it for a couple of weeks, the auto-focus seems to not want to work for the first few minutes of use. After a couple of minutes, it works like a champ.

Is this a defect, or do others have this issue?

11-23-2009, 06:20 PM   #2
Ash
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Oh dear.
It has been mentioned quite a number of times, and many in the last few days...
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/81128-more-sdm-problems.html
11-24-2009, 06:16 AM   #3
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I have exactly the same - ever since it was bought new. And so do many others. It seems to be a prelude to complete SDM failure, but I guess we can live in hope.
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