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10-06-2008, 02:48 PM   #1
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has anyone had their SDM lens do this before

I made a video and put it on youtube to detail the problem ive had with my 50-135 lens

YouTube - sdm test

what do you guys think? I got it in january so the warranty is still good.

10-06-2008, 02:59 PM   #2
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I just got one off a member here and mine squeaks like a wagon wheel, drives me nutts!. Mine doesn't do that it will focus right off the bat. Luckily mine is still under warranty and will be shipping it off to Pentax this week. If that were my lens and it is still with in that one year I would ship it off as well. You could try cleaning the contacts however and see if that helps.
10-06-2008, 03:38 PM   #3
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You could go for warranty, but first I would try the things I tried with my 50-135 when it stalled. I took a microfiber cloth and a bit of alcolhol cleaner to the contacts on both the lens and the mount, making sure I got the SDM/power zoom contacts on both ends.

After a while I got things cleaned up and the lens focuses like a charm right off the bat.

If thorough cleaning does not work, I would send it back for repair.
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