Sigma Lens Firmware Update Corrects the Underexposure When Certain Sigma Interchangeable Lenses for Canon are Used on Canon EOS 1DX Mark II 2016-06-28
Sigma Lenses – Canon Mount: Firmware Update for 20mm F1.4 DG HSM | Art and 24-35mm F2 DG HSM | Art: To Be Fully Functional with Canon Digital Cinema Camera EOS C300 Mark II 2016-06-27
Sigma Advisory: Some SIGMA Interchangeable Lenses for CANON are Not Fully Compatible with CANON EOS-1DX Mark II Camera 2016-06-01
Sigma: New 20mm F1.4 DG HSM Art is the World’s First Full-Frame 20mm F1.4 Ultra-Wide-Angle Lens for Full-Frame DSLRs: For Seascape, Cityscape, Astrophotography, & Low Light, Indoor Photography 2015-10-16
