UV Filter: Reduce haze and improve contrast to your video and digital images by minimizing the amount of ultraviolet (UV) light.Especially useful in areas of high altitude, snow, or beach, eliminating the undesirable blue cast. top level of transmittance. CPL Filter: It is Mainly used to eliminate harmful non-metallic reflected light , and increase the color concentration.Enhances blue sky ,highlights white clouds, Makes the picture more thorough ,improves image clarity and overall creates a more expressive and vivid photo, and also used in shooting through glass ,water and underwater scenery. ND Filter: Higher the ND Value,more obvious the light reducing effect . It Reduces the amount of light in very bright conditions so that camera can choose the correct exposure value and avoid excessive exposure . It also improves the color saturation of the picture,Makes the picture more transparent and alive.You can also use a slow shutter speed to shoot some special effects,such as a mist of water ,a light track at night,etc.When you shoot video in direct sun exposure,you can reduce the shutter speed by ND Filters,so that the video has the appropriate motion blur and looks balanced.