Circular Polarizer (CPL) for Pentax smc FA 645 120mm f/4 Macro Lens - Ultra-Slim Aluminum Frame

Made for the Pentax smc FA 645 120mm f/4 Macro Lens, this circular polarizing (CPL) filter reduces unwanted reflections from non-metallic surfaces such as water and glass while enhancing color and contrast — particularly in blue skies and white clouds. The CPL arranges and filters directionally polarized light perpendicular to reflected light so much of the glare is absorbed; the effect is strongest when shooting at a 90° angle from the sun. Its ultra-slim aluminum frame prevents vignetting yet still allows smooth rotation for adjusting the polarization level. A nonslip upper rim makes installation, rotation and removal quick and secure. Optically, the glass carries double-sided, multi-layered coatings that are anti-oil, anti-dust, anti-soil and provide scratch- and water-resistant protection. Use this filter to cut haze in distant landscapes and produce richer, more vivid colors.