The 72-82mm Magnetic Step-Up Ring from Freewell allows you to screw threaded filters onto compatible lenses or magnetically adapt Freewell magnetic filters.

Filters that have 82mm rear threads can be screwed onto lenses featuring 72mm front threads. Alternatively, for magnetic attachment, first screw this adapter onto a lens that has 72mm front threads, and then magnetically attach Freewell's 82mm magnetic filters onto the front of this adapter ring.