I also know that Metabones and Viltrox adapters both work well for EF mount lenses on M4/3 - with Metabones being almost 100% compatible. But Sigma does not make an electronic adapter for M4/3. It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary for SIGMA, that has the latest firmware Ver.1.03.

Functionally, the converter performs as advertised and depending on your expectations perhaps even better. The AF speed with my Sigma test lens were great and that was the selling point for this author. This is certainly a converter that I would use daily without hesitation.Which EF mount lenses are not compatible on the Sony E/FE mount using the MC-11? Surely that is a relevant point Sigma EF mount lens owners might like to know just what other brand EF mount lenses are in the bonus. On the L-Mount the MC-21 is compatible with all the “easy” Canon EF lenses: 35/1.4; 40/2.8; 50/1.8 STM; 100/2.8L Macro; etc - that is: “the more modern ones”. It is frustrating to have a very nice Canon EF 14/2.8; 24/1.4; or 135/2.0 and find that this bonus doesn’t reach that far. Sto ora utilizzando il Sigma MC11 con la Sony A7R2. Il Canon 16-35 f/2.8 L USM III funziona veramente molto bene e non ha il minimo problema neppure con l'autofocus, che risulta rapido e preciso praticamente in ogni situazione. but what about differences between the MC-11 and MC-21? Perhaps the origin here is the difference between translating E-to-EF and L-to-EF? Perhaps E has better facilities for adapted DSLR lenses, as it was designed to accommodate Sony's adapters to A lenses? Perhaps that means that the MC-11 is more forgiving of unsupported Canon lenses than the MC-21? Construction of the MC-11 adapter is, in a word, beautifully utilitarian. I know that’s two words but one simply would not do. It sports completely metallic construction of what feels to be aluminium.

Keep in mind that the LED indicator light did not illuminate when I attached the Canon lens meaning it is completely non-compatible with the firmware of the converter. With that being said, using a Canon lens with the MC-11 is not outside the realm of experimentation. Just proceed with caution. Thanks, this was what I was looking for - a sort of cross compatibility of the MC-11 and MC-21 as regards their Canon EF bonus lenses. Typically - new adapter manufacturers find it hard to get to do AF at all - then when they do it seems to need re-tries to get the best focus.

Sigma MC-11 Mount Converter - Sigma EOS to Sony E Mount Key Features:

I found EyeAF accurate and fast to use. It is almost as good as using an E-mount lens. It only works in Continuous AF but I found it to be fast and reliable with static subjects. With moving subjects the results can be less accurate. A6300, 1/400, f/1.8, ISO 100 – 18-35mm Art The MOUNT CONVERTER MC-11 allows you to use your SIGMA EOS mount interchangeable lenses with the Sony E-mount camera body.

SIGMA 30mm F1.4 DC HSM | Art、SIGMA 14mm F1.8 DG HSM | Art、SIGMA 20mm F1.4 DG HSM | Art、SIGMA 24mm F1.4 DG HSM | Art、SIGMA 500mm F4 DG OS HSM | Sports、SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary、SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 50-100mm F1.8 DC HSM | Art、SIGMA 12-24mm F4 DG HSM | Art、SIGMA 24-35mm F2 DG HSM | Art、SIGMA 24-105mm F4 DG OS HSM | Art、SIGMA 120-300mm F2.8 DG OS HSM | Sports、SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary、SIGMA 150-600mm F5-6.3 DG OS HSM | Sports The MC-11 converter of course works with the majority of Sigma’s glass including their Contemporary, Sport, and Art lines of lenses. At the time of this writing there are 22 total lenses which are compatible with the MC-11 and that number continues to grow. As it stands, only Canon EF mounts and Sigma SA Mount versions of the converter are available. Sorry Nikon users. Tom, I suspect your post is a comment more than a question but it's worth remembering that the MC-11 is an adapter for Sigma NOT Canon lenses. That Canon lenses work on the MC-11 is serendipitous. It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.A causa del suo difetto il Commlite produce un piano focale curvo e le immagini risultano con problemi di nitidezza ai bordi. Il Sigma è ben più costoso, ma determina un piano focale perfetto che fa rendere al meglio l'ottica, come se fosse montata su un sistema nativo. Now just for fun, here are a few images made using the Sigma MC-11 mount converter with the Sigma 24mm f/1.4 DG HSM Art… It doesn't focus at the same speed as Sony native lens. Example: My Sony 24-70 f2.8 takes less than half a second to acquire focus. While the adapted lens takes at minimum half a second to a second. If that half a second is required for you. Than you better off getting the native lens.