Filters (Sold Separately) Filters cannot be used on the TS-E17mm f/4L You can attach filters to the filter mounting thread on the front of the lens. Only one filter may be attached. Use a polarizing Canon filter (82mm).
Hood (TS-E24mm f/3.5l II) A hood is not available for TS-E17mm f/4L . The EW-88B lens hood can keep unwanted light out of the lens, and also protects the lens from rain, snow, and dust.