Sigma Admits Autofocus Defects with Some New Lenses

APO 50-500mm F4.5-6.3 DG OS HSM Zoom Lens

Sigma Corporation is reporting autofocus defects with some of their recently produced lenses: the APO 50-500mm F4.5-6.3 DG OS HSM, APO 120-400mm F4.5-5.6 DG OS HSM and APO 150-500mm F5-6.3 DG OS HSM lenses.

The lens maker said the AF issue could possibly occur in some lenses within the following range of serial numbers:

SN 10633051 to 10972000 for APO 50-500mm F4.5-6.3 DG OS HSM
SN 10574001 to 10972000 for APO 120-400mm F4.5-5.6 DG OS HSM
SN 10674301 to 10972000 for APO 150-500mm F5-6.3 DG OS HSM

Sigma apologizes and offers their customers free inspection and modification free of charge through their service centers.

[Via: Sigma Japan]

Chris Malinao

About Chris Malinao

Chris teaches Lightroom as workflow software to photography students at the FPPF, Federation of Philippine Photographers Foundation. He also teaches smartphone photography.

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