Product Description : Digital Anti-Reflection Multi Coating - Specially formulated to pass light reflected off of a digital cameras anti aliasing filter and silicon based CCD or CMOS sensor Black Almite Frame and Black Rimmed Glass - The black matte aluminum satin finish almite frame and black rimmed glass aid in reducing stray light and unwanted reflections Low Profile Frame - Ultra thin low profile frames prevent vignetting on super wide digital format lenses Knurled Frame Edges - Frames feature a knurled edge frame for easy attachment and removal