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04-25-2012, 06:15 AM   #1
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What is a SDM failure like?

How does an SDM failure progress? Is it gradual or all at once?

Is it repairable / economically?

Are certain lenses more prone to this failure than others?


04-25-2012, 06:51 AM   #2
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Never had failure so don't know.

for lenses.
almost no failures = DA*55, DA*200, DA*300, DA*60-250
more failures = DA17-70, DA*16-50, DA*50-135
04-25-2012, 07:08 AM   #3
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QuoteOriginally posted by slackercruster Quote
What is a SDM failure like?
It is like a crushing blow to your moral, the feeling of losing a friend, the "WHHHHHHYYYYYYYYYYYYYYYYYY oh WHHHHHHHHHHHHHHHYYYYYYYYYYYY" [as you are screaming in vain]...
04-25-2012, 10:24 AM   #4
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It's happened with every SDM lens that I've owned.....But I still LOVE THE LENSES!!! Mine have started by squeaking. The last culprit, was the DA*60-250- I noticed that it was squeaking more than usual at the last soccer match I was at. I just talked to Pentax Canada, and they suggested I send the lens in sooner than later. So, once again, my lens is adrift in repair land. On my 16-50, it started with occasional squeaks, then intermittently focusing, then not focusing. Ditto for the 50-135. Something makes me think that the ultra dry Okanagan weather effects these lenses. But you know what? I tried other lenses, and I go right back to the Pentax. In my opinion, nothing compares.

04-25-2012, 11:31 AM   #5
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for my 16-50. It is gradual. I find it became more and more frequent to not focus. and eventually I sent out for repair.
04-25-2012, 11:48 AM   #6
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I had one instance of failure of the SDM and it was a DA*16-50: started with a squeaking, like some of the owners above, and it gradually started to not focus at all in AF.

I sent the lens back and it was returned .... as a brand new copy!
Mind you, it was still under warranty.

04-25-2012, 01:18 PM   #7
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Those that go slowly can often be repaired by yourself by tightening a screw or shaft.

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