Firecrest 72mm Superslim stackable HD multicoated circular Polarizer Polarizer removes haze from sky and reflections from water, glass and foliage, accentuates and deepens blues Firecrest multicoating technology makes the filter hydrophobic and scratch resistant This 72mm filter is housed in a 7.5mm superslim ring which is stackable and accepts a lens cap Manufactured in the UK using Schott Superwite glass, the finest optical glass available