This Slim Green Multi-Coated German Optics Schott B270 Circular Polarizer Filter from K&F concept is a circular polarizing filter mad to fit lenses with a 49mm filter thread. It is made with high quality German Schott B270 optical glass, with multicoating on both surfaces to reduce lens flare and increase light transmission. The filter's aluminum filter ring rotates to allow proper positioning, and its slim design allows it to be used on wide-angle lenses without vignetting.
A polarizing filter reduces glare and on reflective surfaces like glass and water, revealing details for imaging. It also reduces haziness when shooting landscapes, and can increase blue saturation in the sky.