OPTEKA High Definition Filter Kit Advances in high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing are combined to produce lenses of unprecedented quality, rather than raising the cost of Opteka filters. However, these advanced materials and techniques allow more efficient and economical production. The results are filters of remarkable quality and durability at remarkably affordable prices. Kit includes: UV Filter - A must for any camera. Penetrates haze, adds warmth, and protects your valuable lens from scratches, dirt, fingerprints, etc. Leave it on your lens at all times Polarizing Filter - For shooting in bright sun, at beaches, snow, ect., Controls bright light entering lenses for a better balanced color image, Darkens blue skies and reduces reflections from non-metallic surfaces. Fluorescent Filter - Reduces the greenish cast common to fluorescent lighting and produces pleasing, natural results, particularly in flesh tones.