The Sigma MC-21 Mount Converter (Canon EF to L-Mount) allows Canon EF mount lenses to be used on L-mount mirrorless cameras from Sigma, Leica, and Panasonic with autofocus support. It retains full electronic communication including phase-detection AF, OSS, and EXIF data transmission. The MC-21 is part of Sigma's L-mount adapter family.
Product released: May 16, 2019
Latest firmware version
Version 1.4, released December 22, 2022
What's new in version 1.4
・MF assist is now supported when a SIGMA CINE LENS for Canon EF mount is attached.・It makes the converter compatible with the SIGMA CINE LENS FF High Speed Prime Line 65mm T1.5 FF for Canon EF mount.*When using the SIGMA FF High Speed Prime Line 65mm T1.5 FF for Canon EF mount, be sure to update the firmware of the SIGMA MOUNT CONVERTER MC-21 EF-L to Ver. 1.4.