An embodiment of superior craftsmanship and innovative technology, the 77mm X4 Uv Traction Filter is designed to deliver unparalleled image quality and protection for your camera lens. Engineered with a robust brass frame, this filter offers enhanced durability and a solid feel, outperforming alternatives made from aluminum or plastic. The X4 Uv Traction Filter boasts Schott Ultrawhite B270 optical glass, manufactured in Germany, renowned for its exceptional clarity and precision. This high-quality glass, coupled with Breakthrough Photography's advanced multi-resistant coating (MRC16), ensures a remarkable light transmission rate of 99.4%. This combination not only enhances image quality but also creates a protective layer that's structurally harder than the glass itself, safeguarding your lens from potential damage.Incorporating nanotec nano coating layers on both sides, the X4 Uv filter excels in repelling dirt, water, and other elements. This innovative coating promotes beading rather than absorption, facilitating faster and easier cleaning. The X4 Uv filter's design is a testament to Breakthrough Photography's commitment to functionality and durability. The filter's full traction texture around its entire circumference ensures secure attachment and removal, reducing the risk of accidental drops or slips. The X4 Uv filter also features an ultra-slim double-threaded 3.2mm Traction Frame. This design eliminates vignetting and light falloff on full-frame wide-angle setups, while still accommodating all your lens caps. In addition to its superior design and materials, every X4 Uv filter comes with a unique serial number laser engraved onto the interior frame. This number is assigned to you upon activation of your 25 Year Ironclad Guarantee, simplifying any future support interactions with Breakthrough Photography. With the 77mm X4 Uv Traction Filter, you're not just investing in a high-quality camera accessory, but also contributing to a better world. Breakthrough Photography donates 5% of every sale directly to non-profits, reinforcing their commitment to making a positive impact. In summary, the 77mm X4 Uv Traction Filter is a professional-grade, high-quality, and durable camera accessory designed to enhance your photography experience while providing robust protection for your lens..