Lens distortion test results have been added to the Sigma 24-70mm f/2.8 EX DG HSM Lens page.
Lens vignetting test results have been added to the following review pages:
Sigma 24-70mm f/2.8 EX DG HSM Lens
Sigma 50-150mm f/2.8 EX DC OS HSM Lens
Sigma 70-200mm f/2.8 EX DG OS HSM Lens
Sigma 150mm f/2.8 EX DG OS HSM Macro Lens