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SDM failures........

johnwhit
Posted 07/10/2010 - 13:31 Link
.........or not as the case may be. Quoted from a reply to a PDML member:

"Just had a talk with Pentax Europe's former technical service manager,
now 645D service (they will keep that in house) and I learned the
following:
- SDM failure rates are monitored and do not exceed those of other components,
- Pentax is aware of the buzz about the issue but considers it unjustified,
- not every perceived failure necessarily is one. SDM motors hold a
charge which depletes after prolonged (months) non-use. Once
discharged, the lens will no longer focus. The charge takes up to two
minutes to rebuild, i.e. the lens needs to be left alone for that time
while connected to a powered on camera. At times, that may still not
be enough to initially overcome mechanical stiction from the long
sitting period."

Interesting

John
PPG link

In LBA hiatus.
K10D
Posted 07/10/2010 - 13:44 Link
I can see why it never got into print in the advertising brochures.

I've never had that issue with my SDM's.

Regards
Inspiration is rarer than a plate glass camera.....
thoughton
Posted 07/10/2010 - 14:30 Link
That is indeed interesting, especially the two minute thing. I wonder what it is that takes two minutes to charge?
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
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johnwhit
Posted 07/10/2010 - 15:15 Link
thoughton wrote:
That is indeed interesting, especially the two minute thing. I wonder what it is that takes two minutes to charge?

A capacitor maybe, I wonder if it charges faster with a fresh battery in the camera

John
PPG link

In LBA hiatus.

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