The RevoRing Swift Magnetic Matte Box from H&Y Filters is built as an accessory to the Swift System magnetic filter system. It requires a base module and a bridge module for mounting on a camera lens. The matte box blocks unwanted top flare or strong sunlight. It accepts a variety of H&Y square magnetic filters, RevoRing Variable Adapters, drop-in filter racks, and drop-in filters, making it a perfect tool for filmmakers in run-and-gun shooting or production house setups.