By connecting a SIGMA Art, Contemporary, or Sports lens to a computer with the SIGMA USB DOCK, photographers can update the lens firmware and adjust focus position and other parameters. Exclusive SIGMA Optimization Pro software makes customization easy. It is possible to select the autofocus speed and adjust the focus limiter and Optical Stabilizer (OS) function.
Compatible lens (as of February, 2018)

18-35mm F1.8 DC HSM
50-100mm F1.8 DC HSM
30mm F1.4 DC HSM
12-24mm F4 DG HSM
14-24mm F2.8 DG HSM
24-35mm F2 DG HSM
24-70mm F2.8 DG OS HSM
24-105mm F4 DG OS HSM / DG HSM
14mm F1.8 DG HSM
20mm F1.4 DG HSM
24mm F1.4 DG HSM
35mm F1.4 DG HSM
50mm F1.4 DG HSM
70mm F2.8 DG MACRO
85mm F1.4 DG HSM
105mm F1.4 DG HSM
135mm F1.8 DG HSM

17-70mm F2.8-4 DC MACRO OS HSM / DC MACRO HSM
18-200mm F3.5-6.3 DC MACRO OS HSM / DC MACRO HSM
18-300mm F3.5-6.3 DC MACRO OS HSM / DC MACRO HSM
100-400mm F5-6.3 DG OS HSM
150-600mm F5-6.3 DG OS HSM

120-300mm F2.8 DG OS HSM
150-600mm F5-6.3 DG OS HSM
500mm F4 DG OS HSM