Tronixpro 77mm Pro Series Hard Tulip Lens Hood For Sigma 17-50mm f/2.8 EX DC OS HSM Zoom Lens, Sigma 85mm f/1.4 EX DG HSM Lens, Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Lens

• This 77mm Pro Series Hard Tulip Lens Hood prevents image-degrading lens flare by blocking stray light from striking the surface of the lens.
It assist in keeping moisture or wind-blown debris off the lens.
This 77mm lens hood protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles.