Shifting will be easier if the supplied shift knob cap is mounted
However, for EOS cameras with built-in flash, the cap will come In contact with the camera during the lens' mounting /detaching or during shift /rotation operation The shift knob cap is recommended for use with EOS-I , EOS-1 0, EOS-1 Ds, and EOS 5D series.
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![](/library/attachments/ServiceWareImages/LDImages/SolutionAnswer/TS E17mm f4L/Untitled-18b.jpg)
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Remove the shift knob screw
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Mount the cap by squeezing it into the shift knob, and then fix it using the supplied screw. To remove the cap, remove the screw and pull out the cap. |
The screw (length 2.2mm) originally in the shift knob cannot be used to keep the shift knob cap in place. Always use the supplied screw.