Pro digital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflections. BAF: Black Almite Frame Filters feature a black matte. BRG: Black Rimmed Glass These filters equipped with black rimmed glass to reduce the chance of the light off the edge. LPF: Low profile frame optimized thin filter frames to help avoid vignetting on super wide angle lenses are also designed to hold a lens cap. KEF: Knurling edge frame; These filters are equipped with a straight knurling edge for non-slip. Easy attachment and removal. Specifications: Material: 1.1mm Optical Glass, Black Rimmed Frame (Thickness): 5.0mm Coated Layers: 16 (Double size) Lens Diameter (mm): 52 Suitable for: ALL CAMERAS Color: MATTE Black Anti-Lock Rim: 1mm