Thank you for purchasing and using our products.

Sigma Corporation would like to announce a firmware update for the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for Nikon is now available. By updating the firmware, the lens will offer improved AF performance.

For customers who own the SIGMA USB DOCK, please update the firmware via SIGMA Optimization Pro.

Applicable product
SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for Nikon

Benefits of this firmware update
– It has improved the AF performance.

SIGMA Optimization Pro Download page
http://www.sigma-global.com/en/download/lenses/sigma-optimization-pro/

For further assistance please contact Sigma Imaging (UK) Ltd Service Department by emailing service@sigmauk.comor telephoning 01707 329 999

We appreciate your continued support for our company and products.