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.
The use of AE is not recommended when the lens is tilted or shifted as exposure errors may result. It is recommended that you use the exposure values when the tilt shift scale are set to the "0" position as a guide and then take the shot with as many exposure settings as possible