Sigma MC-11 adapter successfully allows you to use both Sigma and Canon EF lenses on the excellent Sony A7-series mirrorless cameras complete with quick and reliable autofocusing without adding too much weight or bulk to the overall system. While Sigma officially only support a small number of their own lenses, our quick and dirty test of every Canon lens that we could lay our hands on reveals that the majority of those work almost just as well too.

http://www.photographyblog.com/reviews/sigma_mc_11_canon_mount_ef_adapter_review/

Test with 24 lenses

http://resourcemagonline.com/2016/06/review-the-sigma-mc-11-mount-converter-for-sony-full-frame-e-mount-cameras/67442/

http://www.dsphotoblog.com/?p=1884

v1.02 firmware

• It is fully functional with SIGMA 12-24mm F4 DG HSM | Art, SIGMA 500mm F4 DG OS HSM | Sports and SIGMA 85mm F1.4 DG HSM | Art lenses.
• It has reduced the startup time between turning on the camera and taking an image by not initially driving the focus when the camera is turned on.
• When lenses with Optical Stabilizer (OS) function that are not fully compatible with SIGMA MOUNT CONVERTER MC-11 are attached with SIGMA MOUNT CONVERTER MC-11 and mounted on a camera which incorporates a stabilizer unit, it enables the camera's stabilizer unit to be turned off and the lens's OS function to be turned on and off.
• It has corrected the phenomenon where the distortion correction figure is not indicated properly in the camera, when SIGMA 24-105mm F4 DG OS HSM | Art is attached.

http://www.sigma-global.com/en/download/lenses/firmware/

AF test on Sony A6500

New firmware

We would like to announce the firmware update for the SIGMA MOUNT CONVERTER MC-11 EF-E. This firmware update allows it to be compatible with

• SIGMA 135mm F1.8 DG HSM | Art (Release: April)
• SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary (TBD)
• Cine Lens 50mm T1.5 FF EF mount from FF High Speed Prime Line (TBD) and so on.

http://www.sigma-global.com/en/download/lenses/firmware/

Notice

For customers using SONY α9 (ILCE-9) camera

We have found that the combination of SIGMA MOUNT CONVERTER MC-11 (SA-E and EF-E) and some of SIGMA’s interchangeable zoom lenses may not focus precisely, if it is attached to SONY a9 (ILCE-9), released by SONY in May in 2017.
When using AF-S mode and shooting in telephoto range, it could occasionally display the shot is in focus, although it may not be spotted properly on the subject.
We are afraid of this inconvenience caused to the customers who use these products.
We are now investigating the phenomenon and will make a further announcement on the website shortly.
We appreciate your continued support for our company.

For further information, please contact your nearest authorized SIGMA subsidiary / distributor. http://www.sigma-global.com/en/about/world-network/　　

Using MC-11 on Sony A9

New firmware

• It has become compatible with the SIGMA 14-24mm F2.8 DG HSM | Art for SIGMA.
• With the SGV lenses listed below, it has improved AF performance in the peripheral areas of the image as well as when the “Eye AF” function is selected.
  • SIGMA 35mm F1.4 DG HSM | Art, SIGMA 50mm F1.4 DG HSM | Art, SIGMA 85mm F1.4 DG HSM | Art, SIGMA 135mm F1.8 DG HSM | Art, SIGMA 18-35mm F1.8 DC HSM | Art, SIGMA 24-70mm F2.8 DG OS HSM | Art, SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary
• With lenses that are not compatible with the MC-11, it has corrected the release time lag which occurred during flash photography.

https://www.sigma-global.com/en/download/lenses/firmware/