Amazon.com : 62mm Variable Neutral Density Filter for Sigma 30mm f/1.4 DC HSM Lens : Electronics
Sigma 30mm f/1.4 DC HSM Art Lens for Sony 301-205 - Essential Bundle with Tulip Hood Lens, UV Filter, Cleaning Pen, Blower, Microfiber Cloth and Cleaning Kit - Walmart.com
Sigma EX 30mm 1.4 DC HSM Lens for NIKON with lens hood and B+W filter MINT 85126412548 | eBay