Thank you for purchasing and using our products.

We would like to announce that a new firmware update is now available for the SIGMA 100-400mm F5-6.3 DG DN OS | Contemporary for Sony E-mount.

It has been found that the lens firmware cannot be updated from Ver.01 to Ver.02 by the end-user via the camera. Therefore, SIGMA will update the lens firmware free of charge.

Applicable product
• SIGMA 100-400mm F5-6.3 DG DN OS | Contemporary for Sony E-mount with firmware Ver.01 

How to check the current firmware version
Please check the version from camera menu.
If the lens version is firmware Ver.01 it is necessary to update to the new firmware version.

Benefits of the update
Firmware Ver.02
• It has improved the phenomenon whereby the lens’s optical stabilizer effect differs depending on the shutter type and drive mode used.
• It has corrected the phenomenon whereby the lens firmware cannot be updated via the camera. 

Treatment for this issue
For customers who use the target product with the affected firmware version, SIGMA will update to lens firmware to Ver.02 free of charge*.

* Customers cannot update to lens firmware Ver.02 by themselves. After the lens has been updated to Ver.02 by SIGMA, the user can then update all future lens firmware via the camera.

If you have any questions, please contact our customer service department: service@sigmabenelux.com or https://www.sigmabenelux.com

We apologize for any inconvenience and appreciate your continued support for our company and products.