The Hoya 49mm Ultraviolet (UV) Pro 1 Digital Filter is a wise initial investment. It helps protect your valuable investment from dust, moisture and scratches, which can lead to costly repairs. Digital camera CCD or CMOS sensors are highly susceptible to reflections. This stray light can ruin your photographs with flare and ghosting. Hoya Digital Multi-Coating reduces any internal reflections, which means a clearer image with greater contrast.