MOUNT CONVERTER MC-21 (SA-L) firmware v1.1
Sigma · Released Nov 21, 2019 · First seen by GearPulse Jul 5, 2026
What's in this update
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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