Sigma MOUNT CONVERTER MC-21 (SA-L) firmware

Firmware history

1. Version 1.3 Latest Released Jun 25, 2020 First seen Jul 5, 2026

   Fixed lens name display, DC crop Auto mode, and communication problems. — summary by updatemystuff.com

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   The firmware will correct the phenomenon whereby it displays different product’s n​ame 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.

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2. Version 1.2 Released Apr 23, 2020 First seen Jul 5, 2026
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   The firmware will optimize the communicat​ion regarding the current consumption of the Leica SL2.The firmware will improve the phenomenon of overexposure when continuous sh​ooting when it is used in combination with Panasonic Lumix DC-S1R / DC-S1.

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3. Version 1.1 Released Nov 21, 2019 First seen Jul 5, 2026

   Fixes freeze issue, improves autofocus, optimizes stabilizer and button operation with certain systems, and adjusts crop mode behavior. — summary by updatemystuff.com

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   The firmware will correct the phenomenon whereby the SIGMA fp freeze when using in combination with SIGMA 24-35mm ​F2 DG HSM | Art for SIGMA.The firmware will improve the AF performance when using SIGMA fp.The firmware will optimize the operation of the AF function button and Optical Stabilizer when the lens is used in combination with Panasonic Lumix DC-S1R / S1 that has been updated to the latest firmware.

   The firmware ​will change the DC crop mode not to crop when it is set to Auto, when an incompatible lens is attached.

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