Circular Polarizer (CPL) is used to deepen and enhance the color of blue skies, or to reduce the reflection and glare from glass windows, water or foliage in landscape photography. STC CPL-M filter opens the window to a more vivid color and contrast detail when your eyes are misled by reflection. Using its linear spectrum controlling technology, STC realize the replica of the legendary Minolta CPL lens, the STC ULTRA LAYER CPL-M Filter delivers vivid images with high-quality, sharpness and clarity. STC CPL-M is so charming for its abundance of color and sketching the scene realistically, also it solved the thickness problem and the color cast problem in digital times. It applied to both modern digital camera or to traditional film camera as long as the photographer is pursuing perfect image quality as we do.