【Optical Glass Construction】 High-quality optical glass provides excellent light transmission and image clarity. 【Circular Polarizing Filter】 Effectively eliminates reflections from non-metallic surfaces like glass and water, enhancing color saturation. 【Enhanced Sky and Cloud Contrast】 Deepens blue skies and accentuates white clouds for more dramatic landscape photography. 【Reduced Atmospheric Haze】 Minimizes the softening effect caused by atmospheric haze in landscape shots without altering overall color balance. 【Durable Magnesium-Aluminum Frame】 Matte black finish prevents unwanted reflections and ensures long-lasting performance. Specifications: Filter Type: Circular Polarizing Filter (CPL) Lens Material: Optical glass Frame Material: Magnesium-aluminum alloy Surface Treatment: Matte black finish Filter Size: 72mm Function: Eliminates polarized light, enhances color saturation Application: Landscape photography, reducing reflections 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.