ZOMEI CPL Circular Polarizing Lens 49 mm Camera Filter Original Zomei 100% • A polarizer is an optical filter that passes light of a specific polarization and blocks waves of other polarizations. • It can convert a beam of light of undefined or mixed polarization into a beam with well-defined polarization. • The common types of polarizers are linear polarizers and circular polarizers. • Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography and liquid crystal display technology. • Polarizers can also