Sigma continues to add compatibility to its MC-11 adapter, allowing more Sigma SA and EOS mount Sigma lenses to be used on Sony E-mount cameras. And the latest round of updates adds compatibility with one of Sigma's most anticipated and exciting Art lenses.

The MC-11 comes in two variations—the MC-11 SA-E for Sigma-mount lenses, and the MC-11 EF-E for Canon mount lenses. The new firmware makes the converters compatible with Sigma’s new 14mm f/1.8 HD HSM | Art and the long-awaited 24-70mm f/2.8 DG OS HSM | Art lenses. The MC-11 EF-E also becomes compatible with Sigma's Cine Lens 14mm T2 FF and 135mm T2 FF in the Canon EF mount.

The company has also released new firmware for its 100-400mm f/5-6.3 FG OS HSM | Contemporary telephoto zoom lens. The update improves AF speed in all cases, but it also improves functionality when mounted via MC-11 SA-E adapter. According to Sigma, focusing features are enhanced in the adapter-mounted lens, and the optical stabilization system becomes operational more quickly.

All firmware can be downloaded for free from Sigma’s download page, or through the Sigma USB dock. To update the MC-11 mount converter, simply plug it in to your PC and run the SIGMA Optimization Pro app.