Canon 52mm PL-C Drop-In Circular Polarising Filter (WII)4774B001

Drops into EF 300mm f/2.8L IS II USM, EF 400mm f/4 DO IS II USM, EF 400mm f/2.8L IS II USM, EF 500mm f/4L IS II USM and EF 600mm f/4L IS II USM lenses. Built-in gearing rotates the filter when it's inside the lens, to vary the intensity of its effect.. Reduces the appearance of reflections in non-metallic surfaces. Makes colours appear more saturated. Features. Compatibility. EF300mm F2.8L IS II USM, EF400mm F2.8L IS II USM, EF500mm F4L IS II USM, EF600mm F4L IS II USM. Product colour. Black, Grey