Best ND filters: the 8 best choices for creative photography | TechRadar
Amazon.com : Fotga 55mm Slim Fader Variable Adjustable ND2 to ND4 ND8 ND16 ND32 ND400 ND Neutral Density Filter for Nikon Canon Sony Panasonic Olympus Fujifilm DSLR Cameras Lens with 55 mm
Kenko-Tokina launches NDX variable neutral density filter: Digital Photography Review
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
Fader Variable ND Filter Adjustable ND2 to ND400 Neutral Density for Camera Lens New - 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
variable ND Filters Shootout! cheapest but surprisingly great! REVIEW of Fotga and generic ND-Faders - YouTube
Fader Filters vs Traditional ND Filters « Vincent Laforet's Blog
49mm Fader ND2-32 (1-5 Stop) Variable ND Neutral Density Filter for Camera Lens - KENTFAITH