Optical glass with high definition image quality, effectively isolate water droplets and water vapor. Aluminum alloy frame is more practical, aluminum alloy frame is reliable and firm. Wear-resistant and scratch-resistant, sturdy and more . CPL Polarizer - CPL polarizer can eliminate harmful reflections, improve the clarity of the image, increase the contrast of light, color saturation, such as , white clouds, etc., so that the color is more vivid. UV protective lens - UV protection lens can effectively reduce the blue caused by ultraviolet rays, increase the light transmission, so that the picture quality is clearer, but also a lens protection lens, to bring high-quality protection for the lens. ND Scaler - ND scrim can reduce the amount of incoming light, lower the shutter speed, prevent overexposure, also can resist scattered light, improve the color saturation of the picture, you can clouds, silky flowing water, empty streets. Commonly used in street scenes/natural scenery/tourist attractions/ special effects . NIGHT Anti Light Damage Filter - Anti-light damage filter is mainly used for night , can effectively filter some common off pollution, such as yellow light from high pressure sodium lamps, street lights and artificial light pollution from the lower index, light pollution makes the night lose its charm, but also reflected to the clouds, resulting in night color deviation, which makes the anti-light damage filter is particularly important! STAR - Under the action of point , it can diffract the light points in the scene, so that each light point on the photo radiates a specific beam of light, in order to achieve the effect of radiance. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Dark Gray Material:Light aluminum frame optical glass Package Contents: 8 * Lens Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.