How many screw drive motor failures have there been?

Started 4 months ago | Discussions thread
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Britney Elvis
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How many screw drive motor failures have there been?
4 months ago

There is now a theory that SDM failure in the old DA* zooms is actually not an SDM motor issue, but failed weather seals and other plastic failures causing the motor to essentially burn out. The theory if true, comes with a warning to not engage your in-body screwdrive on these SDM failed lenses.

Has anyone bypassed SDM in the old DA* lenses and then had their inbody screwdrive motor fail.

The reason I ask, is that there have been used lenses sold on the other forum with dead SDM, but screw drive enabled.

So if you have had a failed in-body screwdrive motor after disengaging SDM it would be a public service, to let the forum know.

Thanks

gus
--
"It is not necessary to understand things in order to argue about them."
~~ Pierre Beaumarchais~~

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