Firmware: Sigma 50-100 f/1.8 Art, Sigma 100-400mm Contemporary & Sigma 150-600mm Sport & Contemporary Lenses
SIGMA 50-100mm F1.8 DC HSM | Art for SIGMA (v.1.01) and Canon (v.2.01)This firmware corrects the phenomenon that the AF performance occasionally becomes unstable when Read more... canonrumors.com »