The Digital UV filter absorbs the ultraviolet rays which often makes outdoor photographs hazy and indistinct. It is a multi-purpose fine-weather filter for color as well as black and white photos and also serves as a permanent lens protector. Digital Anti-Reflection Multi Coating ? Specially formulated to pass light reflected off of a digital camera?s 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.