The Hoya Digital Filter Kit II includes a UV (C) HMC filter, a circular polarizer filter & a 3-stop neutral density filter in a convenient filter pouch.This kit provides everything necessary to get started with filtration for your digital camera.The UV (C) filter is a multi-coated filter with a slim mounting ring.This makes it useful for wide-angle lenses to avoid potential vignetting. Also, the UV filter itself is a general use, clear filter that helps to absorb ultraviolet light. No additional coloration or contrast is provided, allowing you to pair this filter with others. It is also useful as a general protective filter to leave on lenses at all times. Filters help to reduce dust & moisture from reaching your lens element & provide additional protection in case of drops or situations where scratching could occur.Hoya HMC filters are multi-coated for reducing flare, ghosting & reflections on the filter surface. As a result, over 97% light transmission is possible, providing you with additional contrast and high color fidelity. A circular polarizer filter helps to reduce reflections & glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze.