Our review of a Sigma 20mm f/1.4 Art (Canon mount) on a Sony A7R mk2 will appear soon. Thanks to the Sigma MC11 converter, it’s possible to use lenses with a Sigma or Canon mount on a Sony E-mount camera. The Sigma 20mm f/1.4 Art is a lens I find especially interesting, because there is no Sony or Zeiss lens with the same brightness and focal length. One point of attention with cameras that have extremely high resolution, like the Sony A7R mk2, is the attachment of a lens to the camera. A tiny bit of play can have disastrous consequences on the (consistency of) sharpness. And an extra converter between lens and camera brings along an extra attachment and thus an extra risk. The mounts of both lens and converter are so solidly built that the image quality of the Sigma Art lenses remains solid. The image quality of Sigma Art lenses on a Sony E-mount camera is exemplary. This is a taster. The Sigma MC11 works on both Sony E-mount APS-C cameras (Sony A6XXX series) and on Sony E-mount full-frame cameras (Sony A7 series). On the Sigma Benelux site, there is a complete list of compatible cameras and Sigma Art, Sports and Contemporary lenses. That is not to say that the Sigma MC11 cannot be used with older Sigma lenses or Canon lenses. In those cases, you will first have to just try it to see whether your lens can be combined with the Sigma MC11.
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