●39mm Firecrest UV 370mm multicoated filter in stackable 5.5mm ring ●370nM is our mid level UV, suitable for professional application and everyday use ●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 ●Provides essential lens protection whilst improving image quality by reducing UV pollution