Ultra-low reflective coating minimizes reflection off internal CCD & CMOS sensors. Non-reflective metal frame eliminates reflections. High grade - Outstanding clarity - Professional quality - Unsurpassed sharpness The highest grade ancillary filters on the market today. A worthy compliment to today's most advanced lenses. Achromat Macro filters are designed to shorten the focal length of your lens and to enhance its macro mode capabilities with outstanding clarity. If your lens already has a macro mode, Achromat will increase and enhance it, allowing for even greater magnification. Other filters can provide simple magnification. Only DHG Achromat Macro filters can provide the full-frame sharpness, detail, and clarity that today's professionals demand. Metal, double threaded frame to allow addtional filters or hoods. Brand new in package Not recommended for wide angle lenses.