HOYA DIGITAL PRO1 58MM CIRCULAR POLARIZER FILTER

Designed and engineered for Digital SLR Cameras and Lenses to serve as a lens protector and to reduce the adverse effects of ultraviolet lightDigital Multi Coated (DMC) -- Greatly reduces lens flare and ghostingBlack Almite Frame (BAF) -- Black matte finish aluminum frame reduces reflectionslack Rimmed Glass (BRG) -- Reduces light reflection around the filter edge to enhance contrastLow Profile Frame (LPF) -- Ultra thin frame helps avoid vignetting on wide angle lenses and Knurled Edge Frame

Source: Digital Camera and Video Store...