A protector filter is a popular addition to camera equipment as it protects the front element of the lens from scratches, dirt, water, and other foreign objects. It can also make cleaning the lens easier, as you can simply remove the filter and clean it instead of the lens. The HOYA FUSION ONE is a new filter series based on the latest HOYA optical technology. HOYA FUSION ONE enhances the HOYA filter product line by merging all highly valued base specifications, such as multi-layer coating, ultra-high light transmission, high-quality optical glass, and low-profile frames, while also incorporating a dirt- and water-repellent coating to meet the new industry standards for photographic optical accessories.