On Oct 2, 2010, at 11:23 AM, William Robb wrote:
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From: "paul stenquist"
Subject: Re: I don't like being the squeaky wheel, but...
What's DC? Have you had trouble with an SDM lens, Ecke? I know Robb
and Celio did. Has anyone else on the list had a failure? I'm
genuinely curious.
I have three that SDM lenses I've used extensively since they were
first released, and they work very well. Maybe I got lucky. Or
perhaps failures are magnified on the web, because the victims
complain loudly, while those of us who are satisfied are mum for
the most part.
We rarely talk about equipment on list anyway. You go over to
PentaxForums, which is much more gearheaded, and there are a whole
lot of failures being talked about. My 60-250 failed while riding in
a gadget bag, probably after less than 50 pictures (I can't say for
sure because frigging Adobe STILL doesn't support that lens in
Lightroom)
This is a technology which should have zero, or practically zero
failure rate, but one of the wonks on PF indicated that the actual
failure rate is closer to 5%.
If this is an accurate number, it is unacceptable in a high end and
expensive product. Even if it is incorrect by a factor of 100%, it
is still an unacceptably high failure rate. Canon has been doing in
lens AF for some 25 years now, and they have virtually no lens
failures.
The fact that there is a perceived problem is indicative that there
is a problem with these lenses, your bullshit luck to the contrary.
Doesn't Pentax Forum whine about everything? I believe there is a
problem, but it's blown out of proportion. My lack of failures or luck
isn't bullshit, it's fact, and you'd be hard-pressed to find a set of
SDM lenses that get more use than mine.
Paul
William Robb
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