the ring I am talking about is on the very end of the extended lens. Basically the final trim ring or outer ring on the lens. Part shown in PIC is dinged and arrow points to the ring I would like to replace. I know, it is just cosmetic but, I want to see if I can repair. See PIC. So question is, how do I remove this outer ring cover. Canon sells this repair piece.
"https://1drv.ms/i/s!ArnGeOEa09Ytiblzp76nYceGQjBfeA"
"https://1drv.ms/i/s!ArnGeOEa09Ytiblzp76nYceGQjBfeA"