【Polarizing Effect】 Circular polarizing filter eliminates reflections and enhances color saturation, deepening blue skies and highlighting clouds. 【Optical Glass Construction】 High-quality optical glass ensures superior image clarity and durability. 【Magnesium-Aluminum Frame】 Lightweight yet sturdy frame with matte black finish to prevent unwanted reflections. 【Versatile Application】 Ideal for reducing glare from non-metallic surfaces like glass or water, and minimizing atmospheric haze in landscape photography. 【Color Balance Preservation】 Enhances image quality without altering the overall color balance of the scene. Specifications: Filter Type: Circular Polarizing (CPL) Lens Material: Optical glass Frame Material: Magnesium-aluminum alloy Surface Treatment: Matte black finish Filter Size: 52mm Note: Do not screw the filter too tightly. Over time, due to changes in the surrounding environment, temperature, and humidity, the optical filter may become more tightly attached to the lens. If screwed on too tightly, it may become difficult to remove. When removing the optical filter, avoid touching the lens surface with your hands or hard objects. Instead, grip the filter’s frame and rotate it to unscrew. If the filter is too tight to unscrew, you can use a clean rubber pad, press it gently against the filter’s edge, and rotate it as a whole. This should help loosen the filter. After removal, do not leave the filter unattended. Store it promptly in a filter case or a dry box to prevent damage.