ITEM NAME:52mm Adjustable Neutral Density ND Fader Filter ND2 ND4 ND8 to ND400 D2D4 52mm Adjustable Neutral Density ND Fader Filter ND2 ND4 ND8 to ND400 D2D4 Materials: optical glass Back thread diameter: 52mm (Attach to lens) Carry only a single filter with the same capability with ND2, ND4, ND8, ND16, ND32... and ND400 Can rotate it to change 1-18 stops Be used when needing slow shutter speed under strong sunlight 52mm ND (neutral density) filter. ND filter which prevents much of the light coming in, but doesn't impair the quality of the adjust the filter based on your own criteria. - Type: Fader ND - Rotating: Ye - The filter is indexed so you know how many stops of ND you are getting exactly. - Screw on like other filters - Don't need to change filters constantly. As the light changes, just dial in another grade of filtration. Large aperture, can create depth of field easily Package included 1 X Fader ND Filter In original package Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.