The Viltrox Pro Series Ultra Slim MC UV Protection Filter in 67 mm is a professional imaging filter designed to protect camera lenses. This ultra-thin filter features multi-layer coating technology that achieves 99.5 percent light transmission in the visible spectrum (420-700 nm) with only 0.3 percent surface reflection, ensuring minimal impact on image quality. Made from B270 professional optical glass, the filter offers excellent optical clarity and durability with a 96HD hardness rating for scratch and wear resistance. The 18-layer high transmission coating technology provides uniform light transmission and balanced color performance, resulting in clearer, brighter, and more realistic images with vibrant colors. The filter effectively blocks ultraviolet rays below 390 nm, preventing the bluish tint often caused by excessive UV exposure. The precise aluminum alloy frame measures just 3.2 mm in thickness, making it suitable for wide-angle lenses without causing vignetting or dark corners. The matte frame absorbs stray light and reduces reflections while maintaining corrosion resistance and thermal stability. A hydrophobic and oleophobic coating on the surface repels water, oil, and dirt, preserving optical clarity under various shooting conditions. The filter undergoes multiple grinding precision processes to ensure high surface flatness and parallelism that meet professional optical standards. This protection filter maintains the original optical performance of your lens while providing reliable protection against dust, moisture, and mechanical damage.