58mm ND2-400 (9 Stops) Variable ND Filter Neutral Density Filter for Camera Lens - KENTFAITH
Ultimaxx 58mm 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 : PROfezzion 77mm Variable ND Filter ND2-ND2000 Variable Neutral Density Fader for Canon EF 16-35mm f4L/EF 24-105mm f4L/Sigma 24mm f1.4 DG HSM/Nikon AF-S 20mm f1.8G ED Lens & Other 77mm Camera