Formatt-Hitech 100mm Firecrest Travel Filter Kit Elia Locardi Signature Edition (for 77mm Lens Thread) Contains two densities of Firecrest Neutral Density Filters in 10 and 4 stops plus a Firecrest Neutral Density Soft Edge Grad 0.9, 100mm holder and 77mm wide angle adapter. Includes an instructional booklet authored by Elia Locardi, plus filter pouches. Firecrest is the worlds premier quality ND filter, with unprecedented neutrality across all spectrums of light, including UV and infrared. Firecrest coating is bonded between glass increasing scratch resistance and durability. Made in the UK on the most advanced computer-controlled manufacturing equipment in the industry.