Best Seller | Canon Drop-In Circular Polarizing Filter PL-C 52 (WIII) 3050C001 Authorized Canon USA Dealer! Read 78.00 User Revie... Free Express Shipping! Canon Drop-In Circular Polarizing Filter PL-C 52 (WIII) For 400mm f/2.8 & 600mm f/4 III Lenses, Integrated Filter Rotation Wheel, Minimizes Reflections and Glare, Reduces Haze and Blue Cast in Landscapes, Enhances Color and Tonal... ... more Canon Drop-In Circular Polarizing Filter PL-C 52 (WIII) 3050C001 Free Express Shipping! Canon Drop-In Circular Polarizing Filter PL-C 52 (WIII) For 400mm f/2.8 & 600mm f/4 III Lenses, Integrated Filter Rotation Wheel, Minimizes Reflections and Glare, Reduces Haze and Blue Cast in Landscapes, Enhances Color and Tonal... | | $229.00 FREE shipping go to store |