The UV or Haze filter is not only an excellent filter for visually improving images on both digital and film but it can always stay on the lens to protect it from fingerprints, dust, moisture, etc. It absorbs the short wave portion of the spectrum so in hazy conditions a better image of the scene is possible. Loss of sharpness from UV Rays and the blue tones common in infinity scenes are eliminated. No exposure correction is needed.
The PhotoRepublik Pro UV Filters are also made with precision cut SCHOTT glass to preserve even the sharpness and detail.