The CineMorph Mod Filter for Sigma & Zeiss Distagon (Canon mount) lenses — Vid-Atlantic Media Productions
Amazon.com : Sigma 16mm f/1.4 DC DN for Sony - High Grade Multi-Coated, Threaded, 3 Piece Lens Filter Kit (67mm) + Nwv Direct Microfiber Cleaning Cloth. : Electronics
Sigma 35mm f/1.4 DG HSM ART Lens for Canon EF w/Haida 67mm CPL+Clear Filter Kit 340101 F
WonderPana Filter Holder for Sigma 8-16mm f/4.5-5.6 DC HSM Ultra-Wide – Fotodiox, Inc. USA
Using Neutral Density Filters with the SIGMA 14-24mm F2.8 DG DN Art Lens | SIGMA Blog
Sigma 24mm f/1.4 DG HSM Art Lens for Sony E 401965 - Essential UV Filter Bundle - Newegg.com
Sigma 85mm f/1.4 DG DN Art Lens for Sony E with Essential Filter Bundle: 3PC Multi-Coated UV Filter Kit, Variable Neutral Density Filter (ND2-ND400) & More (17pc Bundle) - Walmart.com
Amazon.com : 77mm Variable Neutral Density Filter for Sigma 17-50mm Lens : Electronics
WonderPana Filter Holder for Sigma 20mm f/1.4 DG HSM Art Lens - Ultra – Fotodiox, Inc. USA
86mm 95mm 105mm UV Filter Protective Lens Filter Circular Polarizer CPL Filter for Nikon Canon Sigma Camera - AliExpress
Amazon.com : Haida HD4567 Rear Lens ND 4 Filter Kit Dedicated to Sigma 14-24mm F/2.8 DG DN Art Lens & Sigma 24mm f/1.4 DG DN Art Lens for Sony E and Leica