Why settle for less when you can enhance your photography skills with the 77mm Alpha Ii Circular Polarizer Filter This upgraded version boasts a sleeker, thinner frame and superior quality glass, making it an ideal choice for budding photographers. Despite being an entry-level filter, it delivers the same degree of polarization as its high-end counterparts, offering you excellent value for money.The Alpha Ii series is designed to be cost-effective by eliminating premium features such as multi-coating, optical glass, and hardened, waterproof top layers, without compromising on performance. It's the perfect tool for capturing breathtaking scenic photography, as it intensifies the contrast between blue skies and white clouds, making foliage stand out more vividly.The science behind this is that light rays become polarized when they traverse through atmospheric moisture and pollution, as well as when they bounce off non-metallic surfaces.