Test with 24 lenses
Also other adapters compared at same URL
http://dc.watch.impress.co.jp/docs/review/date_lens/1005379.html
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/
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