This Tiffen Digital HT Filter has 86% absorption of Ultra Violet (UV) light. Film is more sensitive to Ultra Violet light than our eyes. This often shows up as a haze or a bluish cast, especially when shot from high altitudes and from long distances, particularly over water. UV filters also help protect your lens from dust, moisture, fingerprints, scratches and damage from cleaning. Since they absorb no normal light and have no effect on color or contrast, they can be kept on your lens at all times. Tiffen Ultra Violet filters are available in a variety of absorbtion levels and sizes. Tiffen Digital HT Filters: Made from the purest optical quality glass and Tiffen's award-winning ColorCore technology, Tiffen Digital HT - High Transmission - filters offer a new breakthrough in multi-coating technology. Tiffen Digital HT Filter coated filter with the strength of titanium, unmatched scratch-resistant durability and worry-free cleaning. Other coated filters on the market today cautiously suggest delicate, if any, cleaning procedures, in fear of destroying the coating (and thereby the filter). Not with the Digital HT filters - the secret is in the titanium coating that makes it extremely durable and protects against damage and mark up. And that's not all, these High Transmission filters feature a low profile titanium finish ring and anti-reflective black lock ring, with a distinctive titanium finish that sets these filters apart from the rest. Digital HT filters are made in the USA and come with a 10-year warranty your guarantee of quality assurance. Digital HT filters are available as the following filters: Digital Ultra Clear, Haze 86 (with 86% UV absorption), Circular Polarizer, 812½ Warming Filter, ND .06, ND 1.2, Soft/FX 3, Star 4 Point 2, and Color-Grad ND.0.6 in sizes 52mm-82mm.