HDFX Limited Edition High Definition 52mm Multi Coated Pure Glass 3 Piece Filter Kit (UV, CPL, FL) For the Canon EOS 40D, 50D, 60D, 7D Digital SLR Cameras Which Have Any Of These (55-200mm, 50mm 1.8, 50mm 2.5) Canon Lenses High Definition HD3 Technology offers genuine color protection low-dispersion Multi-Coated and heat treated glass to eliminate distortion and minimize light reflections,glass Each Lens is Multi Coated Made From Pure Crystalized Glass Life Time Warranty Carrying Case Included