The ultraviolet filter prevents UV light from reaching the lens, helping increase clarity and reduce haze. As a result, your photos look crystal clear even in mountainous and coastal areas, where ultraviolet light is particularly strong. The circular polarize, meanwhile, is essential for outdoor photography, as it deepens the intensity of blue skies and reduces or eliminates glare.
Slim polarizer filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colors to become more saturated and appear clearer with better contrast. This effect is often used to increase the contrast and saturation in blue skies and white clouds.
A UV filter is a popular addition to someone's camera kit, often used to protect the front element of the lens from scratches, dirt, water and other foreign matter, and can also make it easier to keep your lens clean, as you can simply remove the filter and clean that instead of the lens
Neutral Density filters are often ignored by photographers, but they have several uses and offer the possibility to achieve otherwise unachievable results. ND filters appear grey and reduce the amount of light reaching the film, they have no affect on color balance.