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Made by Sigma
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
Version 1.3, released June 25, 2020
Verified by LatestUpdate: June 18, 2026
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.
Official Sigma Mount Converter MC-21 (SA to L-Mount) product page
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. It was originally released on May 16, 2019.
The latest firmware version for the Sigma Mount Converter MC-21 (SA to L-Mount) is 1.3. It was released on June 25, 2020.
Sigma Mount Converter MC-21 (SA to L-Mount) firmware version 1.3 includes the following changes: 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.
To update the Sigma Mount Converter MC-21 (SA to L-Mount) firmware, download the latest version (1.3) from Sigma's website. Follow Sigma's installation instructions, which typically involve copying the firmware file to a memory card or connecting via USB. You can download the latest firmware from Sigma's support page.
Details and download instructions for the latest Sigma Mount Converter MC-21 (SA to L-Mount) firmware (version 1.3) are on Sigma's official release page: https://www.sigma-global.com/en/support/firmware/mc-21/?mount=sa-l
You can track Sigma Mount Converter MC-21 (SA to L-Mount) firmware updates automatically on LatestUpdate.io. We monitor Sigma's releases and notify you when new firmware versions are available, so you never miss an update.
We have tracked 3 firmware versions for the Sigma Mount Converter MC-21 (SA to L-Mount). Sigma releases updates to fix bugs, improve performance, and add new features. Track this product on LatestUpdate.io to be notified of future releases.
The Sigma Mount Converter MC-21 (SA to L-Mount) is manufactured by Sigma. Visit the official product page for more information.