Allows the use of slow shutter speeds to record movement/image blur in subjects such as waterfalls, clouds or any fast moving subject Eliminates buying many ND Filters as it is designed with a built-in rotating ring that controls neutral density ranging from ND2 to ND400 Ultra-slim aluminum filter ring(only 6.2mm) avoids vignetting in shoting 16 layers of coating on both sides of the glass effectively protect the fitler against scratching, water, oil, fingerprints and statics Adopts optical glasses from Japan, fits any lenses with 62mm filter thread. Such like the Fujifilm XF 23mm f/1.4 R Lens, Fujifilm XF 55-200mm f/3.5-4.8 R LM OIS Lens, Fujifilm XF 56mm f/1.2 R Lens, Sony 18-250mm f/3.5-6.3 DT Alpha A-Mount Wide-Telephoto Lens, Sony 70-300mm f/4.5-5.6G Telephoto Zoom Lens, Nikon AF-S VR Micro-NIKKOR 105mm f/2.8G IF-ED Lens, Nikon AF Zoom-NIKKOR 70-300mm f/4-5.6G Lens