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.

Rollei Bay VI R1.5 Skylight UV Filter for Rolleiflex SL66  picture
Rollei Bay VI R1.5 Skylight UV Filter for Rolleiflex SL66
Unomat UVF 310 mm 46/49/52 Video Correction Filter New Old Stock picture
Unomat UVF 310 mm 46/49/52 Video Correction Filter New Old Stock
Petri Finder & ACE 32 metal slip on lens hood w UV / O / Y filters for Petri 35  picture
Petri Finder & ACE 32 metal slip on lens hood w UV / O / Y filters for Petri 35
15 filter adapter B&W Schneider Wechselhalter 32 32.5 36 37 38 40.5 41 42   ☆☆☆ picture
15 filter adapter B&W Schneider Wechselhalter 32 32.5 36 37 38 40.5 41 42 ☆☆☆
Vintage 12 Inch F4 Lens Made In ENGLAND by RANK TAYLOR HOBSON wth Yellow Filter  picture
Vintage 12 Inch F4 Lens Made In ENGLAND by RANK TAYLOR HOBSON wth Yellow Filter