The Viltrox Pro Series Ultra Slim MC UV Protection Filter in 77 mm is a professional imaging accessory designed to protect camera lenses while maintaining optical clarity. Constructed from B270 professional optical glass, this ultra-thin filter features an 18-layer multi-coating that achieves a light transmission of 99.5 percent in the visible spectrum (420 to 700 nm) with a surface reflection of only 0.3 percent, ensuring minimal light scattering and balanced color reproduction. The filter effectively blocks ultraviolet rays below 390 nm to prevent bluish photo effects. It includes a water-repellent and oil-resistant coating for easy cleaning and durability. The precision-crafted aluminum alloy frame measures 3.2 mm in thickness, making it suitable for wide-angle lenses without causing vignetting. With high hardness and scratch resistance, this filter is built to withstand various shooting environments while providing reliable lens protection.