1. Variable ND2ND32 Camera Lens Filter: This 52mm variable ND filter provides 5 stops of exposure adjustment, ranging from ND2, ND4, ND8, ND16 to ND32 (the numbers represent the fraction of light entering the lens). Use it to gain precise control over exposure and shutter speed when capturing rivers, waterfalls, light trails, and more. 2. No XCross Dark Spot: The marked frame allows for accurate ND stop adjustments by rotating the filter. When mounted on wideangle lenses, there's no concern about Xcross dark spots. 3. MultiLayer NanoCoated Optical HD Glass: Crafted from quality Japanese AGC optical glass, this resolution ND filter delivers cinematic effects without sacrificing image quality. Featuring 30 layers of doublesided nanocoating with just 0.1% light reflection, it minimizes stray light and ghosting while resisting moisture, oil, dust, and scratches. 4. Professional Manufacturing: The lightweight aircraftgrade aluminum frame ensures durability. With an ultrathin design (0.37 inches / 9.5mm including threads; 0.29 inches / 7.4mm without threads), it prevents vignetting. The matte black finish and CNC precision machining enhance durability and prevent lens jamming.