6.6 x 6.6" Ultra Circular Polarizing Filter 1mm They are a tool that

They are a tool that allow for experimentation

and is designed to provide a polarization effect that is 15 to 20% greater than other Tiffen filters which only provide a linear or circular polarization effect and are not UltraPol filters

Low-Profile Titanium Filter Ring

and textures are given a smoother appearance

6.6 x 6.6" Ultra Circular Polarizing Filter 1mm They are a tool thatThe Tiffen 6. 6x6. 6" Circular Ultra Polarizing Filter is a wonderful filter designed to bring significantly more "snap" to your images. If a traditional polarizer doesn't give you enough "zip", the "Ultra" polarizer gives you a little more. It will bump up your blue skies even more making the difference between a good photo and a great image. Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter