Polarising Filter Polaroid 49mm Circular Polarising Filter:Polarizing filter reduces unwanted reflections and glare, increases saturation, and delivers brighter images when shooting misty landscapes.The Polaroid polarising filter reduces glare, ghosting, and unwanted reflections. It filters glare reflected by glossy non-metallic objects, such as glass. It greatly increases the saturation of the sky and leaves, but also clears the haze in landscape shots. Unlike the linear polariser, the circular polarisation filter supports full autofocus and exposure. The filter is made of optical glass and has an aluminium filter ring for higher rigidity and expansion resistance at temperature changes.Key featuresReduces glare and reflectionsBrightens landscape shotsClears landscape shotsAluminium frame ringIdeal at a 90° angle from the sun