Genustech 77mm Variable Neutral Density and Circular G-PND77 B&H
Ultimaxx 55mm ND2 to ND400 Slim Fader Variable Adjustable ND Neutral Density Filter for All DSLR Camera Lens with Same Filter Thread Size - Walmart.com
Amazon.com : JJC 82mm Variable Neutral Density Filter ND2 to ND400, Slim Fader ND Filter for Canon EF 24-70mm f/2.8, EF 16-35mm f/2.8, Sony FE 16-35mm f/2.8, Nikon 24-70mm f/2.8 & More
Amazon.com : JJC 58mm ND Filter ND2-2000 VND Variable Neutral Density Adjustable Fader for Canon EOS Rebel T7 T6 T8i T7i T6i T6s T5i SL3 90D 80D with EF-S 18-55mm Kit Lens