MOUNT CONVERTER MC-21 (EF-L) firmware v1.3
Sigma · Released Jun 25, 2020 · First seen by GearPulse Jul 5, 2026
What's in this update
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.
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