Amazon.com : High Definition 77mm CPL Circular Polarizing Filter for Canon EF 24–70mm f/4L is USM, Canon EF 24–105mm f/4L is II USM, Canon EF 24–105mm f/4L is USM & Canon EF
105mm Landscape Circular Polarizer Filter - Allen's Camera
Amazon.com : 105mm Pro Series Multi-Coated High Resolution Polarized Filter for Olympus 90-250mm f/2.8 ED Zuiko Digital Zoom Lens : Electronics
CPL Circular Polarizer Glare Shine Polarizing Filter for Canon EF 24-105mm f/4L is USM Lens : Electronics - Amazon.com