Clear Protective Filter, Absorbs Ultraviolet Light, 1x Filter Factor, No Exposure Change, 98.5% Average Visible Light Transmission, Absorbs 28% of UV Light at 395nm, Progressively Eliminates UV before 395nm, Anti-Reflective/Hydrophobic, Asahi Glass, 49mm Front Filter Threads, Slim, 3.0mm Aluminum-Alloy Filter Ring, Plastic Case. The 49mm SMC L395 UV Filter from NiSi is a general use clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight. Aside from the reduction of unwanted blue casts no additional coloration or contrast is created and adjustments to exposure are not required while using this filter. When the NiSi 49mm SMC L395 UV Filter is applied 28% of ultraviolet light waves are absorbed at 395 nanometers before which they are progressively eliminated helping to limit the light that enters a camera to the visible spectrum. The appearance of blue casts that can occur while recording video or still photos under daylight that also features ultraviolet light is reduced preserving color accuracy throughout the frame. NiSi SMC L395 UV filters are constructed from Asahi glass for increased clarity as well as color fidelity while providing approximately 98.5% transmission of visible light. This 49mm SMC L395 UV filter features a 3.0mm thick aluminum-alloy filter ring for durability while remaining lightweight. It minimizes the potential for vignetting and includes corresponding 49mm front filter threads for use with other screw-on filters. To prevent internal ghosting and reflections each glass surface also includes an anti-reflective hydrophobic coating that results in an improved beading effect when in contact with water for greater cleaning efficiency.