The Sigma MC-21 Mount Converter (Sigma SA to L-Mount) allows Sigma SA mount lenses to be used on L-mount mirrorless cameras from Sigma, Leica, and Panasonic with autofocus support. It maintains full electronic communication including phase-detection AF, OS stabilization, and EXIF data. The MC-21 is part of Sigma's L-mount adapter family.
Product released: May 16, 2019
Latest firmware version
Version 1.3, released June 25, 2020
What's new in version 1.3
The firmware will correct the phenomenon whereby it displays different product’s name for some lenses when it is attached.The firmware will correct the phenomenon whereby the crop does not work for some DC lenses when the camera’s DC crop mode is set at “Auto”.The firmware will correct the rarely occurring communication problem with the SIGMA fp.SIGMA MOUNT CONVERTER MC-21 for SA-L firmware Ver.1.1 is available for update at the following site.