Feature●Firecrest technology is neutral across the whole spectrum, including UV, visible and infra red●77mm diameter stackable filter reduces light by 9 F-stops●Firecrest multicoating technology makes the filter hydrophobic and scratch resistant●Manufactured in the UK using Schott Superwite glass, the finest optical glass availableDescription Firecrest ND 77mm Neutral density ND 2.7 (9 Stops) Filter for photo, video, broadcast and cinema production.