ZR ( Zero Reflection ) Super Multi-CoatingThis 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 TechnologyOur 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 FrameThe 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.Wide-Band Polarising FilmThe Kenko Zeta wide-band polarising film transmits light more evenly across the visible spectrum to give a more neutral colour balance than traditional circular polarising filters provide.C-PL filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colours to become more saturated and appear clearer with better contrast. This effect is often used to increase the contrast and saturation in blue skies and white clouds. Kenko's C-PL filters do not affect the overall colour balance of a shot.The Zeta series debuted in 2009 after a long, exhaustive eort by Kenko to oer the highest end lters. Adopting the ne.wly developed the ZR coat, which achieves one of the worlds best surface reectivity levels of 0.3% or less (or 0.6% or less with C-PL of low-temperature multi-coat specication), the Zeta series cuts reection on the lters 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.Specs:Type: PolarisingCountry/Region of Manufacture: JapanShape: RoundMount Fitting: Threaded