Sigma 50-500mm, 150-500mm & 120-400mm Lens Servic

[ppaaoolloo]

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".

[Bobby Kintanar]

Whew, I had to check my lens (150-500) just to be sure. I'm safe. :-)