Disassembling Canon EF 35-105mm f/4.5-5.6 USM Lens

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Disassembling Canon EF 35-105mm f/4.5-5.6 USM Lens: crwdns2935265:00crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

Remove the lens mount, and then remove the rubber seal (shown in place around the edge of the lens in this picture).
Note the piece of plastic that just fell out. Not a good sign!

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