C-PL filter with ultra-low reflection thanks to ZR coating. Thin frame design compatible with wide-angle lenses. Filter diameter: 55mm / [Zeta CPL55S] Zeta CPL55S. The Zeta series, Kenko's highest-end filter line, utilizes superior optical technology and precision machining. Compatible with both digital and film. Compatible with wide-angle lenses. C-PL filters eliminate surface reflections from water and glass, deepen blue skies, and enhance the vivid colors of foliage, mountain slopes, and buildings. ZR coating for ultra-low reflection. ZR coating achieves ultra-low surface reflection of less than 0.6%, minimizing the impact on image quality caused by filter installation. Black-painted glass perimeter: The black coating on the filter glass perimeter minimizes internal reflections. Thin frame design compatible with wide-angle lenses. Features a thin aluminum frame design with precision machining. The frame is almost as thick as a lens protection filter. It can be used safely with wide-angle lenses. Comes in a stylish compact case made specifically for Zeta. A stylish compact case is included, worthy of this top-notch filter. It can be easily opened with a single push. ■ Specifications ■ Filter diameter: 55mm Accessories: Compact case