Fotga Slim Fader Variable ND Filter Adjustable ND2 to ND400 52mm Neutral Density

Material: Optical Glass from Japan Back thread diameter (attach to lens): 52mm Front thread diameter (attach additional filter): 55mm Slim profile design. Thin filters are essential for avoiding vignetting when shooting at wider angles. Simply rotate the ring of this filter, it offers 2 to 8 stops added density The Fader ND filter is suggested to use with wide and standard lens to obtain the best performance. Image quality may drop when focal length above 200mm. It may not be suitable for wide angle lens