Amazon.com : 62mm Pro Series Multi-Coated High Resolution Digital Ultraviolet Filter for Sigma 18-250mm F3.5-6.3 DC Macro OS HSM, Sigma 70-300mm f/4-5.6 DG OS Lens, Sigma 18-200mm f/3.5-6.3 II DC OS HSM
Sigma launches 18-50mm F2.8 DC DN for E- and L-mounts: Digital Photography Review
SIGMA 340101 35MM F/1.4 DG HSM ART LENS FOR CANON DSLR CAMERAS