Camgloss EW-73 B Size and shape of the Camgloss EW-73 B lens hood perfectly match the focal length of your Canon lens. Thus the lens is effectively protected from undesirable incident stray light. The matt non-reflective inner surface prevents distracting reflections. In addition your lens is effectively protected from sun light and your front lens from lateral shocks. Compatible with: Canon EF-S 17-85mm / 4-5.6 IS USM Canon EF-S 18-135mm / 3.5-5.6 IS