ZR ( Zero Reflection ) Super Multi-Coating This innovative coating will not interfere with any colour or light transmission. Reflections are eliminated by allowing light to enter the filter at virtually any angle. This filter will produce superior results and can be used with any type of lens (wide angle to telephoto). Ultra Smooth Surface - Nano Glass Technology Our Nano Glass Technology creates an ultra smooth surface from the finest particles of glass, making it stain and scratch resistant without any effect to the image. Ultra Thin Frame The glass of this filter is set in a precision machined frame and attached using Retainer Ring Mount Technology giving this filter an unsurpassed durability. An ultra thin frame also makes it wide-angle lens compatible. This is the ultimate in clear filters. It will not affect the colour balance or performance of your lenses in the slightest. However, constant use will protect your valued lenses from expensive front element damage which could be caused by dirt, knicks or scratches The Zeta series debuted in 2009 after a long, exhaustive e?ort by Kenko to o?er the highest end ?lters. Adopting the ne.wly developed the ZR coat, which achieves one of the world?s best surface re?ectivity levels of 0.3% or less (or 0.6% or less with C-PL of low-temperature multi-coat speci?cation), the Zeta series cuts re?ection on the ?lter?s glass surface to eliminate ?are and ghosting. All Zeta ?lters use glass material of the highest quality, and their frame, which retains the ?lter glass, ensures the maximum degree of ?atness.