Hoya Alpha Cir Pl 49Mm

About This Itemcircular Polarizer Filter3 To 4X Filter Factor, +1.6 To 2 Stopshelps To Eliminate Reflections And Glarereduces Haze In Landscapesgreater Color And Tonal Saturationnon-Coatedoptical Glassaluminum Frame49Mm Front Filter Threadsplastic Casewhat'S In The Boxhoya 49Mm Alpha Circular Polarizer Filterplastic Filter Caselimited 1-Year Warrantythe Hoya 49Mm Alpha Circular Polarizer Filter Helps To Reduce Reflections And Glare By Filtering Out Light That Has Become Polarized Due To Reflection From A Non-Metallic Surface. The Light From The Sun Naturally Becomes Partially Polarized Due To Reflecting Off Electrons In Air Molecules, Causing The Light To Scatter Into What Appears As Haze. A Polarizing Filter Arranges, And Filters, This Directionally Polarized Light Perpendicularly To The Reflected Light, Allowing For The Absorption Of Much Of This Light. This Results In A Noticeable Reduction Of Glare And Reflections From Non-Metallic Surfaces And An Increase In The Saturation Of Skies And Foliage.