Image quality is what matters most at PRO-OPTIC. The 49mm Multi Coated UV Slim Filter is PRO-OPTIC's top-performing protective UV filter offering 99% light transmission and LIFE TIME WARRANTY. It's ideal for photographers who demand the highest-quality glass and recommended for enhancing the performance of today's multicoated lenses. To achieve superior 99% light transmission, PRO-OPTIC uses highly-polished glass, multi-coating, and additional advanced elements that improve the filter's light transmission. Resistance coating helps assure that water, oil, dust, and fingerprints are removed with a gentle wipe. A durable brass filter ring is designed to screw on and off effortlessly, and it's thin to prevent vignetting when used with wide-angle lenses. 99% Light Transmission Protecting your lens doesn't mean you have to lose optical quality. By using highly-polished glass and advanced coatings, PRO-OPTIC Filters offers a 99% transmission rate, which is the highest possible transmission rate for glass. Multi-Coating Multi-coating enhances light transmission to the demanding level set for all POR-OPTIC filters. It reduces unwanted internal reflections and ghosting that can compromise your images. UV Protection The filter blocks UV light and reduces the bluish cast of daylight that can affect color accuracy, especially at higher altitudes. Slim Design Measuring only 3