Sigma USB Dock NIKON

Sigma (878955) USB Docking Hub for A S or C Global Vision Lenses - Nikon Fit. The Sigma USB Dock is a useful tool for updating the lens's firmware to adjust parameters such as focus, using Sigma's own Optimization Pro software, downloadable from Sigma's website. For sports lenses it is possible to customise focusing speed, the focus limiter and optical stabilisation.

As of January 2014 this dock is compatible with the following lenses:
35mm f/1.4 DG HSM
30mm f/1.4 DC HSM
17-70mm f/2.8-4 DC Macro OS HSM
17-70mm f/2.8-4 DC Maco HSM
120-300mm f/2.8 DG OS HSM

Functions for Contemporary, Art and Sports lens models
Update lens firmware via the internet
Adjust focus setting from 4 categories for prime lenses and 16 categories (4 focal length options in combination with 4 distance options)

Functions for Sports line Lenses
Adjust focusing speed using 3 modes
Adjust focus limiting