PolarPro just announced two "Peter McKinnon Edition" Variable ND filters - Here are our first impressions using one
Amazon.com : NEEWER 77mm HD Variable ND Filter ND2-ND32 (1-5 Stops) No X Cross/Optical Glass/30 Layer Nano Coated/Ultra Slim Aluminum Alloy Frame/Water Repellent/Anti Scratch Adjustable Neutral Density Filter : Electronics
Amazon.com : NEEWER 77mm Magnetic Variable ND Filter ND2-ND32(1-5 Stops) with Magnetic Adapter Ring, HD Adjustable Neutral Density Filter with Water Repellent Double Sided 30 Layer Coatings, No X Cross : Electronics
4 New K&F Concept Filters Put to the Test-Filter Gear Review