Thank you for purchasing and using our products.
For customers who own the SIGMA USB DOCK, please update the firmware via SIGMA Optimization Pro.
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】
For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
We appreciate your continued support for our company and products.