Amazon.com : PROfezzion [2 in 1] 67mm ND Filter [ND2-ND32] and CPL Polarizer Polarizing Filter, Variable Neutral Density Adjustable Fader with 5 Hard Stops for Canon/Nikon/Tamron/Sigma Lenses : Electronics
Amazon.com : 77mm Variable Fader ND2-ND32 ND Filter and CPL Circular Polarizing Filter for Canon RF 50mm f/1.2L USM Lens & Canon RF 24-105mm f/4L is USM Lens : Electronics
NiSi HUC C-PL PRO Nano 46mm Circular Polarizer Filter | NiSi Optics USA
Canon 58mm Circular Polarizing Filter 2188B001 B&H Photo Video
Breakthrough Photography 67mm X4 Dark 6-Stop Titanium Circular Polariz — Glazer's Camera Inc
Amazon.com : High Definition 67mm CPL Circular Polarizing Filter for Canon EF 70–200mm USM Lens, Canon EF 70−300mm USM Lens, Canon EF 35mm f/2 is USM Lens & Canon EF 100mm f/2.8L
Dodd Camera - CANON 77MM Circular Polarizing Filter