【 Variable ND Filter】Beschoi ND2-ND400 Variable Filter reduces the amount of light reaching the camera sensor, allowing you to shoot in different conditions with slower shutter speeds and wider apertures. It is perfect for capturing rivers, waterfalls, light trails, and other moving objects with dynamic motion blur. | 【Ultra-Slim Structure】The 0.37" (9.5mm) thick ultra-thin lens with precise threading is easy to mount. Add almost no weight on the lens. The wide outer frame prevents vignetting in your shots and perfectly suits wide-angle and telephoto lenses. | 【Premium Material】Japanese NITTO polarizing film ensures optimal neutrality and accurate color contrast and reproduction. With 4-element superior optical glass and 42-layer multi-resistant coatings, this ND filter makes you take images and videos with great confidence. | 【Multiple-Layered Coatings】42 nano-coatings with 0.1% minimum light reflectance can block ultraviolet rays from 300nm to 380nm and reduce flare and ghosting. The multi-resistant coatings protect the filter against moisture, oil, dust, and scratches. | 【Note】1. An X-patterned glare or ghosting may appear when light is reduced to ND256. 2. Actual ND effects may differ at the Min and Max marks as well as in different environments. 3. For long exposure, please purchase ND1000 or ND2000 filters. 4. For this 40.5mm ND filter, the lens cap/hood should be 43mm.