Amazon.com : Haida M10 Filter Holder Kit for 100mm Filters with CPL & 77mm Adapter Ring : Electronics
Haida Red-Diamond 100 x 150mm Hard Graduated Neutral Density Filter - Ikan
Amazon.com : Haida 2 in 1 CPL + VND Filter for Camera Pro II Multi-Coating Circular Polarizer + Variable Neutral Density SLR Camera Lens Filter Waterproof Scratch Resistant Nano-Coating Filter 82mm : Electronics
The Haida M10 II Filter System brings some nice workflow improvements over the original M10