This MC UV370 filter effectively absorbs ultraviolet rays which often make outdoor photographs hazy and less crisp. This is a good multi-purpose filter that can be left on the lens at all time for protection. This filter is multi-coated on both side of the glass to reduce the chance of reflections or flare that could ruin a good shot. The UV370 has a high-quality durable aluminum frame that can stand up to years of us.