Sigma 30mm f/2.8 EX DN Lens for Panasonic/Olympus Micro 330963
Sigma 30mm F2.8 DN Black Lens for Sony E-Mount NEX (33B965) with Starter Accessories Package includes UV Ultraviolet Filter + Deluxe Cleaning Kit + Air Dust Blower + Cap Keeper - Walmart.com
My Sigma 19mm, 30mm, and 60mm E-Mount DN Lenses Review – SonyAlphaLab
Amazon.com : Lens Cap Cover Keeper Protector for Sigma 19mm, 30mm, 60mm F2.8 DN | A (Art) : Electronics