Features:This FOTGA Fader ND Filter is adjustable from ND2↔? ND4↔? ND8 to ND400 Infinitely↔? satisfied different shooting conditions.Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color.Apply slow shutter speed under strong sunlight exposure↔? large aperture is available to create depth of field easily.Mark scale and "Min" (the lightest)↔? "Max" (darkest) tags on the outer ring to help users accurately resets to a certain density.With 55mm male thread/ 58mm female thread can be mounted to 55mm lens or attached to 58mm additional filter. Suitable for dynamic screen↔? waterfalls↔? streams↔? waves↔? etc.Specifications:Material: Optical GlassNeutral density grade: 2-400Back thread diameter (attach to lens↔? male thread): 55mmFront thread diameter (attach additional filter↔? female thread): 58mmItem weight: 22g / 0.78oxPackage size: 7.2 * 9 * 1.5cm / 2.8 * 3.5 * 0.6iPackage weight: 47g / 1.66ozPackage List:1 * ND Filter