The Tiffen 77mm Indie Neutral Density Filter Kit is designed to optimise your outdoor shooting experience. Included are four filters, a 1-stop (0.3), 2-stop (0.6), 3-stop (0.9) and 4-stop (1.2) set of ND filters. Using these filters permits you to use slower shutter speeds that can produce blurred effects of nature, sports or any action you choose, i.e. flowing water, cars etc. This combination of ND filters gives you the freedom to make some unique and effective images that would ordinarily not be possible. Tiffen uses the highest quality glass that contains an anti-glare and anti-reflective coating.