500mm F4 DG OS HSM | Sports (SIGMA SA-mount) firmware v1.03
Sigma · Released Mar 25, 2021 · First seen by GearPulse Jul 5, 2026
What's in this update
It has fixed a rarely-occurring focus problem depending on the shooting distance during AF shooting.
GearPulse never hosts firmware files — always download from the official source.
Get it from Sigma →