Hoya 55mm Pro-1 Digital ND4 Screw-in Filter

DMC: Digital Multi-Coated Filter, greatly reduces the appearance of lens flare and ghosting caused by reflections BAF: Black Almite Frame, a black matte aluminium satin finish almite frame which reduces reflections BRG: Black Rimmed Glass reduces the chance of light reflecting off the edge LPF: Low Profile Frame, ultra Thin Frames to help avoid vignetting on super wide angle lenses. These frames hold a lens cap KEF: Knurling Edge Frame, these filters are equipped with a straight knurling edge for non-slip, easy attachement and removal