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01-10-2010, 04:34 AM   #1
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Squeaky SDM?

Hey all,

I have a DA* 50-135 that has started squeaking when autofocusing - particularly at the "ends" of the focus (i.e., when the focus wheel stops). Some quick googling makes me worried that this is a precursor to SDM failure.

Is this sort of noisy squeaking covered under Pentax warranty? I'd like to get this fixed since it *is* annoying, but more because I really don't want to be stuck with dead SDM the moment this thing gets out of warranty (I have about 7-8 months left).

01-12-2010, 01:55 PM   #2
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I don't know if that would be covered under the warranty. but it should be. Not because of any "impending" failure, but because SDM is supposed to be completely silent. That's the whole point of SDM, silent focusing. If it's not silent, it's not working right.
01-12-2010, 02:29 PM   #3
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Just get it sent in for repair.
May as well get it right and working as expected.
01-12-2010, 06:14 PM   #4
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My 30-135 squeaks too.
However, it is passed warrenty so while it is annoying, I'm not sure I want to spend the money. Anyone have any idea of what it would cost?
Also, is this an early warning sign of future SDM failure?

I also have the DA*16-50 and iit s perfectly silent.

01-12-2010, 09:17 PM   #5
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QuoteOriginally posted by DAKS Quote
Also, is this an early warning sign of future SDM failure?
Some would say buying an SDM lens is an early sign of future SDM failure.
01-12-2010, 09:43 PM   #6
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QuoteOriginally posted by Damn Brit Quote
Some would say buying an SDM lens is an early sign of future SDM failure.
Very funny Gary.
The likelihood of people dying is also 100% but it's all about what happens during life that counts.
01-12-2010, 09:47 PM   #7
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QuoteOriginally posted by Ash Quote
Very funny Gary.
The likelihood of people dying is also 100% but it's all about what happens during life that counts.
We don't have a choice about being born but we do have a choice about lens purchase.
01-12-2010, 10:10 PM   #8
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QuoteOriginally posted by Damn Brit Quote
We don't have a choice about being born but we do have a choice about lens purchase.
OK, bad example Gary.
How about driving & road fatalities or smoking & chronic obstructive airways disease...

Anyway, I'm still happy taking that risk - the 16-50 has thus far exceeded my expectations...

01-13-2010, 05:05 PM   #9
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my 16-50 has well exceeded my expectations too, but I'm just not sure what to do about the squeaky 50-135 without spending a lot of money.
01-13-2010, 05:09 PM   #10
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QuoteOriginally posted by DAKS Quote
my 16-50 has well exceeded my expectations too, but I'm just not sure what to do about the squeaky 50-135 without spending a lot of money.
If you were unscrupulous, you could sell it to someone else who doesn't know about SDM suckiness and buy a new one with the money you get. These things still manage to sell for almost the same price used as they do new.

But for the record, I passed up a DA* 50-135mm that still had 5 months warranty left on it because it had previously suffered an SDM failure (and been fixed under warranty). I was happier spending $80 more for a new one with a full warranty than save $80 for a lens with half warranty that had a bad history.
01-13-2010, 05:11 PM   #11
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QuoteOriginally posted by GoremanX Quote
But for the record, I passed up a DA* 50-135mm that still had 5 months warranty left on it because it had previously suffered an SDM failure. I was happier spending $80 more for a new one with a full warranty than save $80 for a lens with half warranty that had a bad history.
They claim to replace the whole motor. But I guess $80 doesn't seem to be a big difference...especially if the old motor put bad mojo on the rest of the lens.
01-13-2010, 05:16 PM   #12
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QuoteOriginally posted by asdf Quote
They claim to replace the whole motor. But I guess $80 doesn't seem to be a big difference...especially if the old motor put bad mojo on the rest of the lens.
I dunno, stories like this tend to disclaim that:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/86167-da%2A50-...ts-refurb.html

However, that particular story had a happy ending:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/86575-pentax-t...135-story.html

...at least, until the SDM fails again...
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