The 82mm NanoPro Magnetic Filter Kit from Haida features a circular polarizer filter and two ND filters, all magnetic. A magnetic adapter ring is included that screws onto the 82mm front filter thread of compatible lenses. With this adapter ring attached, you can then magnetically mount and swap the CPL and ND filters.

A 77-82mm magnetic step-up ring is included that can be screwed onto 77mm lens filter threads to magnetically support all the 82mm magnetic filters. With the magnetic adapter ring and this step-up ring in your toolkit, you'll be able to work with both 82mm- and 77mm-threaded lenses. The kit is complete with a magnetic lens cap.