Enhance Your Photos Protect Your Lenses. The Sony α system includes high-quality Carl Zeiss® optical filters to fit Sony α system lenses: Multi-coated protectors guard against scratches featuring T*® coating to suppress flares. Multi-Coated Protective Filters Protect your lens investment from scratches and dust with MC (Multi-Coated) Protector for alpha 49mm lens diameter. Carl Zeiss® Optical Filter Design A world leader in advanced photo-optical design Carl Zeiss high-quality filters ideally complement the precision optics of the Sony α system. T* Coating Pioneered by Carl Zeiss® these coated optical filters feature T*® coatings that are highly effective in minimizing reflections between filter and lens surfaces to suppress flares and ghosts. Low Profile Design Built to fit the Sony α system zoom and fixed lenses you’ll use most often -- the slim low-profile design prevents vignetting when used with wide-angle lenses. Exclusive case included Each filter comes with an exclusive case to protect the filter when not in use.