Mcuv FiltersThe filter is made of Japanese optical glass material and coated with blue film to ensure a good light transmittance (average light transmittance is 94%). Provide improved clarity and color balance, as well as to provide protection to your lens.cpl Circular Polarizer FilterThe filter is made of Japanese optical glass material and coated with blue film to ensure a good reflectivity, and control of color saturation - all with picture perfect results.Neutral Density FiltersUsed to reduce the quantity of light that reaches the sensor of the camera. The filter is made of Japanese optical glass material and coated with blue film to ensure a good reflectivity. It is especially suitable for preventing overexposure under large aperture, long exposure under small aperture, and video shooting..