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This glass filter is practically neutral in color effect. It transmits
visible light without hindrance while cutting out ultraviolet radiation. Due to
the short wavelength, UV is highly scattered and has a high intensity in hazy
conditions as diffuse radiation. A color film reacts with a blue-violet veil and
loss in contrast, while b&w film gives the sky a brighter look, thus reduces the
contrast of the clouds against the sky and makes distance views pale.