Lens filters are transparent or semi-transparent accessories that attach to the front of a camera lens. They serve various purposes, such as reducing glare, enhancing colors, or protecting the lens from scratches and dust. Common types include polarizing filters, which reduce reflections and improve contrast, and ND filters, which limit the amount of light entering the lens for better exposure control. Using lens filters can significantly improve the quality of photographs. For instance, a UV filter can help block ultraviolet light, which can cause haziness in images, while a graduated neutral density filter balances exposure between bright skies and darker landscapes. These tools are essential for photographers looking to achieve specific effects or protect their equipment.