The Lee Filters SW150 Mark II Lens Adapter is an aluminium alloy adapter ring designed to allow a separately available SW150 Mark II Filter Holder to connect to a Sigma 12-24mm f/4.5-5.6 II DG lens. It is built with three different ring components - a front ring, a compression ring, and a locking ring. The front right slides easily over the built-in hood on the lens with the front rings integrated lugs positioned away from the lens body, and the compression and lock rings slip over the rear of the lens until they meet the front ring, where they can be attached to each other.
