●39mm Firecrest UV 400mm multicoated filter in stackable 5.5mm ring ●Highest quality Firecrest UV filter with 400nM cut off ●Built in the UK using Schott Superwite glass for highest image fidelity ●Firecrest multicoating is anti reflective, anti scratch and hydrophobic for shooting in most challenging conditions ●Maximum UV protection for outdoors, snow and high altitude whilst also an excellent everyday filter