Rotating Ring to Choose Degree of ND: neutral density can be easily adjusted from ND2 to ND400 by rotating the ring.
Allows Wider Aperture: large aperture is available to create depth of field easily, which helps separate subjects from their background.
Allows Reduced Shutter Speed: Zomei variable ND filter provides great shutter speed flexibility and eliminates the need for multiple constant ND filters.
Black Aluminum Filter Ring: black superfine grinding ring and the package of fashion and simply.
Optical Glass Construction:well made from high quality materials, AGC optical glass, which meet the Requirements of European Union's standards of Environment Protection-ROHS.