Canon TS-E 135mm f/4L MACRO TS-E50mm f/2.8L Macro TS-E90mm f/2.8L Macro TS-E13 - Page 31

11. Shift Knob Cap Shifting will be easier if the supplied shift knob cap is mounted (p.19). However, note that for EOS cameras with a built-in flash, the cap may come in contact with the camera when mounting/detaching the lens, shifting the lens, or turning the lens for rotation. Screw (length: 3 mm) Remove the shift knob screw. Mount the cap by squeezing it onto the shift knob, and then fix it in place using the supplied screw. Shift knob cap OO Be sure to fix the cap in place using the supplied screw (length: 3 mm). OO The removed screw (length: 2.2 mm) cannot be used to fix the cap in place. Store the removed screw, as it will be required when not using the cap. OO Use a precision screwdriver (Phillips). OO Do not turn the shift knob forcefully. This may cause malfunction. ENG-30