Key FeaturesFor 100mm K-Series Filter Holder16x Filter Factor, 4-StopReduce Exposure in Selective AreasSoft-Edged Line of TransitionReduce Shutter Speed, Widen Aperture9-Layer Multi-Coating, Gorilla GlassQuick Release Magnetic Filter FrameMagnetically Mounts on HolderFast Use of Filter on HolderMicrofiber Cleaning Cloth, Filter Pouch