Neewer filters, made from the finest solid optical glass, are ground and polished to the most practical thinness. l glass, are ground and polished to the most practical thinness. In addition, they are heat-treated to avoid any distortion or focal shift, and each filter is subject to strict tests in order to ensure a flawless, even surface, which is essential to a quality filter and exceptional photographs. Fits 58mm lenses Ideal for protecting your valuable lens from scratches and dust Circular Polarizing filter eliminates reflections from non-metallic surfaces, and increases contrast and color saturation