CamDesign EW-73B Dedicated Reversible Lens Hood for Canon 18-135mm EF-S f/3.5-5.6 IS, 17-85mm EF-S f/4.5-5.6 IS USM Lenses (Canon EW-73B Replacement) + CamDesign Wristband Lens Focus Ring Handy reversible design allows you to attach the hood in reverse for easy storage in your bag Minimizes flare and ghosting by blocking out stray light Protects your lens from accidental impact and the elements Designed to accommodate the exact angle of view of the camera's lens Easy to use bayonet mount attaches to your lens for a tight and secure fit. Just twist on or off. No wobbling or cross-threading