Rangers 40.5mm CPL filter - 3.9mm Ultrathin 14 layers Multi Coating MC Japan optics Glass, Circular Polarizer Filter 99.9%. Ultrahigh polarization efficiency will cut the undesired & reflected light from water surfaces, snow and glass. Polarization efficiency is exactly the same at each part of the CPL. Constructed of Japanese AGC optical glass and original Japanese polaroid film, the Rangers HD CPL filter can reduce lens flare and ghosting significantly. 3.9mm Ultrathin Spiral drawn Aluminum Frame Design,3.9mm separates the front of the filter and lens glass to avoid vignetting on super wide angle lenses, ensuring great durability and jamming prevention. 14 Nano-coated layers of advanced polymers covering both sides of the glass to reduce all flare and ghosts caused by reflective light. Note: Please verify your camera's lens thread size before ordering. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by an "" (diameter) symbol. For example: 40.5 = 40.5mm lens thread size.