RainbowImaging 62mm Pro 1D PRO1-D Supe Slim CPL Circular PL filter (Glass made in Japan, same class as HOYA Pro 1 series) Ultra thin 1mm glass (same class as HOYA Pro 1 series) made in Japan. Increases colour saturation, darken blue skies so white clouds stand out and eliminate reflections from non-metallic surfaces like glass or water. 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. Equipped with a straight knurling edge for non-slip, easy attachment and removal.