|Our review of a Sigma 35mm f/1.4 Art (Canon mount) on a Sony A7R mk2 will appear soon. Thanks to the Sigma MC11 converter, it is possible to use lenses with a Sigma or Canon mount on a Sony E-mount camera. One point of attention for cameras with extremely high resolution, like the Sony A7R mk2, is the attachment of a lens on the camera. A small bit of play can have disastrous consequences on (the evenness of) the 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 incidentally 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 try to see whether your lens can be combined with the Sigma MC11.