This is the Kenko lens protection filter, the top-of-the-line "ZX II Protector" (49mm diameter). Made in Japan, a mark of quality. It perfectly protects the front of your valuable lens from scratches and dirt without compromising the resolution of your lens. ▼ Features of this filter: 【Ultimate Planarity "Floating Frame"】 Adopting the innovative "Floating Frame Technology" that minimizes stress on the filter glass. It draws out 100% of the lens's original descriptive power. 【The Strongest Class of Protection Performance】 Kenko's highest technology is condensed into this single filter, including the "Dust-Free Coat" that powerfully repels water droplets and fingerprints, and the "ZR01 Coat" that achieves ultra-low reflection.