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Sigma 50-500mm, 150-500mm and 120-400mm Lens Service Notice

Sigma has issued a Service Notice regarding the following lenses and serial number ranges:
 
APO 50-500mm F4.5-6.3 DG OS HSM (10633051 - 10972000)
APO 120-400mm F4.5-5.6 DG OS HSM (10574001 - 10972000)
APO 150-500mm F5-6.3 DG OS HSM (10674301 - 10972000)
 
Details of the issue being resolved are vague: "possible autofocus defect".
Posted: 6/16/2010 9:29:16 AM CT   Posted By: Bryan
Category: Sigma News
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