The new MOUNT CONVERTER MC-11 allows you to use your SIGMA EOS mount interchangeable lenses with the Sony E-mount camera body. Until now, the market has seen the introduction of many methods for using lenses from one camera system with a body from a different system. In the digital age, however, camera systems have become much more complex, and it is challenging to create a mount converter that aligns both the mechanics and software of the lens and body. Creating a converter that matches lenses for current DSLRs to bodies for mirrorless interchangeable-lens camera systems is even more challenging. Now the market demands a converter that goes beyond simply aligning the flange back distance to retaining full functionality. MOUNT CONVERTER MC-11 incorporates the digital data necessary to provide fast and smooth AF for compatible lenses as well as OS features and functions of the camera that help control peripheral brightness and correct transverse chromatic aberration, distortion, and more. In addition, since Sony E-mount camera bodies do not require mechanical integration with lenses for aperture control, the MOUNT CONVERTER MC-11 makes SIGMA interchangeable lenses for Canon cameras fully compatible with the automatic exposure control of Sony E-mount camera bodies. MOUNT CONVERTER MC-11 is ideal for professional photographers who use different camera systems depending on the subject, as well as amateur photographers who enjoy using a variety of camera systems. Increasing the compatibility of lenses with different camera systems makes these assets more valuable than ever. In addition, users of Sony E-mount camera bodies will enjoy an immediate increase in the number of lenses available to them. Note: In order for your Sigma interchangeable lenses in Sigma's Art, Contemporary and Sports lines to work effectively when utilizing SIGMA MOUNT CONVERTER MC-11, the lens firmware may need be updated to the current version, which includes specific firmware enhancements to ensure compatibility with the MC-11 (Lens affected). If you have the MOUNT CONVERTER MC-11 you can check for compatibility on Sigma's webpage. Compatibility: Cameras - Sony a7-series, a6000-series, a5000-series, and NEX-series mirrorless camera bodies. Lenses - This adapter is compatible with Sigma's EF-mount versions of the following lenses: MC-11 is required (35mm Full Size sensor)12-24mm F4 DG HSM | Art14-24mm F2.8 DG HSM I Art24-35mm F2 DG HSM | Art24-70mm F2.8 DG OS HSM | Art24-105mm F4 DG OS HSM | Art70-200mm F2.8 DG OS HSM I Sports100-400mm F5-6.3 DG OS HSM | Contemporary120-300mm F2.8 DG OS HSM | Sports150-600mm F5-6.3 DG OS HSM | Sports150-600mm F5-6.3 DG OS HSM | Contemporary14mm F1.8 DG HSM | Art20mm F1.4 DG HSM | Art24mm F1.4 DG HSM | Art28mm F1.4 DG HSM | Art35mm F1.4 DG HSM | Art40mm F1.4 DG HSM | Art50mm F1.4 DG HSM | Art70mm F2.8 DG MACRO | Art85mm F1.4 DG HSM | Art105mm F1.4 DG HSM I Art135mm F1.8 DG HSM | Art500mm F4 DG OS HSM | SportMC-11 is required (APS-C sensor)17-70mm F2.8-4 DC Macro OS HSM | Contemporary18-35mm F1.8 DC HSM | Art18-200mm F3.5-6.3 DC Macro OS HSM | Contemporary18-300mm F3.5-6.3 DC Macro OS HSM | Contemporary50-100mm F1.8 DC HSM | Art30mm F1.4 DC HSM | ArtMC-11 is not required19mm F2.8 DN HSM | Art30mm F2.8 DN HSM | Art60mm F2.8 DN HSM | Art16mm F1.4 DC DN | Contemporary30mm F1.4 DC DN | Contemporary56mm F1.4 DC DN | Contemporary