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The UV filter, also known as mist or haze filter, is not only an excellent universal filter for visually improving photographs with all film types, but should always remain as a protection against external influences on the lens. It absorbs in receiving the short-wave portion of the interfering scattered light, so that at present haze a differentiated playback environment is possible. Those caused by UV radiation and their strong scattering blurs, as well as a rendition of the subject to bluish (blue tint), for remote shooting are eliminated by the colorless UV filter or attenuated neutral. An exposure factor is not necessary. The Heliopan UV filter is completely neutral in color and not yellow!