Fotga 49mm Ultra Slim UV Ultra-violet Lens Protector Filter with MC Multi-coated for Canon Nikon Sony Pentax Olympus Panasonic Fujifilm Leica Ricoh Samsung Dslr Cameras 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. Ultra 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. UVC:UV protected case. Filter cases protected to further lengthen the life of filters.