The Urth 40.5 mm lens filter kit includes a UV filter, a circular polarizing filter (CPL), and an ND2 400 filter. These filters are specifically designed for photographers looking to enhance their image quality and achieve creative effects. The UV filter protects the lens from dust, scratches, and unwanted UV rays, while the CPL filter reduces reflections and increases color saturation, which is particularly beneficial for shots involving water or glass. The ND2 400 filter allows for a reduction in the amount of light hitting the sensor, enabling longer exposure times and better control over depth of field. With a diameter of 40.5 mm, these screw-on filters are easy to attach and provide a versatile solution for various photographic needs. The kit is ideal for anyone looking to expand their photographic capabilities and improve the quality of their shots.