1、PREVENT OVEREXPOSURE: The polarizer can also play the role of a gray mirror, that is, without affecting the normal restoration of the color of the work, the light entry rate of the lens can be reduced, in order to prevent excessive exposure, the polarizer can be used as a gray filter 2、MORE TRANSPARENT AND HIERARCHICAL: The polarizer can make the clear sky more blue, the clouds are more three dimensional, the picture contrast is stronger, highlighting the level, suitable for shoot scenery 3、CPL EFFECT: Circular polarizing lens can eliminate reflections from water and glass, increases color saturation and contrast, and makes landscape photos more transparent and nature 4、ULTRA THIN MATERIAL: Circular polarizing filter frames are made of airline grade quality aluminum alloy for stability and durability. The thickness is only 5.3mm, which is very thin 5、HIGH TRANSMITTANCE OPTICAL GLASS: Circular polarizing lens filter adopts multi layer coating, possess high transmittance and accurate color reproduction. The appearance of frame is matte coated for more texture Item Type: Circular Polarizing Lens Material: Aluminum alloy and optical glass Frame Thickness: Approx. 5.3mm / 0.21in 1 x CPL Polarizing Lens 1 x Storage Box