100-400mm F5-6.3 DG DN OS | Contemporary (L-Mount) firmware v1.2
Sigma · Released Jul 15, 2021 · First seen by GearPulse Jul 5, 2026
What's in this update
It has improved the phenomenon whereby the lens’s optical stabilizer effect differs depending on the shutter type used.
GearPulse never hosts firmware files — always download from the official source.
Get it from Sigma →