Canon EF 70-200mm f/2.8L IS USM Zooming Key Replacement

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Install the Zoom Ring

Place the zoom ring into place. The two screw holes should line up with the screw holes on the upper gear ring. The numbers on the zoom ring should be on the side of the lens with the focus window.
Screw in the two JIS #000 zoom ring screws.
Slide the rubber zoom grip into place.
It's okay if the zoom ring has a little bit of play to it at this stage.

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