It looks like Sigma has been diligently working to fix bugs and ensure their Global Vision lenses work properly with recently announced gear.
Sigma 24-70mm f/2.8 DG OS HSM | Art & Sigma 100-400mm f/5-6.3 DG OS HSM | Contemporary for Sigma / Canon / Nikon
Benefit of this firmware update
Sigma Mount Converter MC-11 SA-E / EF-E
Benefit of this firmware update
The above firmware updates are available for installation in Sigma Optimization Pro via the Sigma USB Dock.
In addition to firmware updates detailed above, Sigma announced today that they are now offering a rear filter holder installation service for the otherwise incompatibile-with-front-filters 14mm f/1.8 DG HSM Art lens.
Sigma 14mm f/1.8 DG HSM | Art
The Sigma Corporation is pleased to announce a chargeable service for installing the Rear Filter Holder FHR-11 on the SIGMA 14mm F1.8 DG HSM | Art for Canon.
From September onwards, the dedicated service staff for Sigma products will be able to install the Rear Filter Holder FHR-11 on SIGMA 14mm F1.8 DG HSM | Art for Canon.
The Rear Filter Holder FHR-11 is an accessory exclusively designed for the SIGMA 14mm F1.8 DG HSM | Art for Canon, and it enables photographers to use a filter sheet with the lens.By attaching it to the rear of the lens, it will allow more freedom of expression.
In case it is not convenient for your environment to use the installation service and you prefer to do it by your own effort, the necessary parts can be sold.Please contact your nearest authorized SIGMA subsidiary / distributor for further information. Customers who do not own the appropriate tools or who do not feel confident in attaching the filter holder themselves may take advantage of the chargeable installation service.
B&H carries the following: