Amazon.com : 62mm HD MC UV Filter for: Sigma 30mm F1.4 EX DC HSM 62mm Ultraviolet Filter, 62mm UV Filter, 62 mm UV Filter : Electronics
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