Hoya Fusion One Circular Polariser 40.5mm

The Fusion One 40.5mm slimline circular polarising filter has an 18-layer Super HMC coating. The filter glass is mounted in a low-profile 5mm deep aluminium frame which prevents vignetting occurring with wide-angle lenses. A polarizer diminishes or eliminates non-metallic reflections, intensifies colours (especially a blue sky). Loses between 1-3 stops of light depending on rotation point.