Formatt-Hitech 127mm Firecrest Superslim Stackable UV IR Cut 127mm Fire crest UV+IR Multicoated filter in the stackable 5.5mm SuperSlim ring. Reduces both ultraviolet and infrared to eliminate the contamination that causes image degradation. Fire crest multicoating is anti-reflective and hydrophobic for shooting in challenging conditions Made in the UK on the most advanced computer-controlled manufacturing equipment in the industry.