RainbowImaging Pro 1D super slim 55mm UV (Ultra Violet) Multi Coated Glass Filter, (Glass made in Japan, same class as HOYA Pro 1 series) Glass Made in Japan. Ultra thin 1mm glass ( same class as HOYA Pro 1 series). Pro Multi-Coated. Pro Digital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflections. Black Almite Frame Filters feature a black matte. Black Rimmed Glass. These filters are equipped with black rimmed glass to reduce the chance of light reflecting off the edge. Low Profile Frame Ultra thin filter frames (3MM) to help avoid vignetting on super wide angle lenses are also designed to hold. Knurling Edge Frame . These filters are equipped with a straight knurling edge for non-slip, easy attachment and removal.