The B+W Series 9 KR 1.5 Skylight Filter with its light pink color helps correct the bluish cast that registers on films and videotapes.This skylight 1A filter can be used to reduce the effects of haze due to UV lightIt can be left along with the lens to protect the lenses from scratches, moisture, and dustThis UV and polarizing filter is an ideal option, especially for capturing mountains, sky, and marine scenes