Sigma 14-24mm f/2.8 DG DN ART Lens for Sony E with Filter Kit, Cleaning Cloth 192223141841 | eBay
Kase K150P Filter Holder for Sigma 14-24mm f2.8 (Sony mount) Magnetic | eBay
Using Neutral Density Filters with the SIGMA 14-24mm F2.8 DG DN Art Lens | SIGMA Blog
NiSi S6 150mm Filter Holder Adapter Ring NIP-S6-ADO-SIG1424CN
Using Neutral Density Filters with the SIGMA 14-24mm F2.8 DG DN Art Lens | SIGMA Blog
The perfect rear filters for the Sigma 14-24MM DG DN
Amazon.com: Hakuba Haida HD4567 Rear Lens ND Filter Kit (ND0.9/1.2/1.8/3.0) [Sigma 14-24mm F2.8 DG DN Art Sony E Mount/L Mount Only] : Automotive
Haida Rear Lens Filter Kit for Sigma 14-24mm F/2.8 DG DN Art Lens for Sony E and Leica L
Amazon.com : Hakuba Haida HD4325 Square Filter System for M15 Series, Adapter Ring for Sigma 0.5-0.9 inches (14-24 mm), F2.8 DG HSM Art Lens Only : Electronics
Kase K150P 150mm Filter Holder plus CPL Kit for Sigma 1112050010