Canon Macrophoto Coupler FL 55mmThe Canon Macrophoto Coupler FL 55mm is a lens reversing extension tube designed for macro use. You can use it directly on camera or on bellows its totally up to you. Attaches to FD FL cameras and lenses with 55mm filter threads; this also includes the little hood you're meant to mount to the back of the reversed lens. In excellent condition. Lens, camera and bellows are sold separately.