【ND ND2-ND400 Lens Filter】Neutral density can be adjusted from ND2 to ND400, reduce amount of colorless light reaching film, control each lighting environment. 【ND ND2-ND400 Lens Filter】Print "Min" (bright) and "Max" (dark) on FaderND outer ring, they are interspersed with a set of punctuation marks, designed to help user accurately reset specific density reference. 【ND ND2-ND400 Lens Filter】When lens focusing length is in super wide angle range and aperture value is F2.8, if adjust filter to high density for using, relatively obvious "crossing"spot or slight color shift may occur, to insure that image is not disturbed, we suggest you lower filter density value at this point, until disturbing light spot disappears, then shoot normally. 【ND ND2-ND400 Lens Filter】Using this filter, more freely control aperture and shutter, bringing more exposure means and creation space for photography creation,effectively preventing overexposure. 【ND ND2-ND400 Lens Filter】ND2 reduces exposure by 1 level, ND4 by 2 level,ND8 by 3 level,number after ND represents ability of ND lens to block light, suitable for dynamic screens, waterfalls, streams, waves, etc.