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Old Aug 14, 2008, 12:50 PM   #3
JimC
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Join Date: Jun 2003
Location: Savannah, GA (USA)
Posts: 22,378
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I've seen a number of reports about stripped gears with this lens in Sony Alpha models (mostly with the newer A200 and A700 since those have faster AF motors in them).

Note that you can set the AF drive speed to slow versus fast in the A700 menus to help prevent damage to lenses with questionable build quality. The other Sony Alpha models don't have that feature.

This Sigma model seems to be the only lens impacted by the faster focus motors from reports I've seen (no other lenses seem to have numerous reports of stripped gears like this Sigma model, even though any AF lens can fail from time to time in virtually any camera).

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