Kenko 46mm Pro1d Lotus Circular Polarizer (C-PL) - Water-Repellent & Oil Repellent Function, Digital Multi-Coated 2, Camera Lens Filters Lotus Circular PL filter is used to reduce unwanted reflections from non-metallic surface such as water of glass and increase saturation and contrast of the sky and objects. Water repellent / oil repellent Hard alumite, Knurling Edge Frame The Digital Multi-coat 2, the newly developed coating Made in Japan