The hoya 405mm pro1 digital uv filter absorbs the ultraviolet rays which often make outdoor photographs hazy and indistinct this multi purpose all around filter can serves as a permanent lens protector while designed specifically for digital cameras the pro1 digital series can be used on film cameras as well digital camera ccdcmos sensors are extremely susceptible to reflections which can cause stray light to ruin your photographs do not use bare glass filters and risk your va