Canon EF 100-300mm f/4.5-5.6 USM Teardown

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Canon EF 100-300mm f/4.5-5.6 USM Teardown, Accessing the Zoom Assembly: crwdns2935265:00crwdnd2935265:01crwdnd2935265:03crwdne2935265:0

Canon EF 100-300mm f/4.5-5.6 USM Teardown, Accessing the Zoom Assembly: crwdns2935265:00crwdnd2935265:02crwdnd2935265:03crwdne2935265:0

Canon EF 100-300mm f/4.5-5.6 USM Teardown, Accessing the Zoom Assembly: crwdns2935265:00crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

Accessing the Zoom Assembly

Unscrew the two Phillips #000 screws holding on the zooming key.
Take off the zoom ring.
Unscrew the three JIS #000 screws holding in the zoom assembly.
Remove the zoom assembly from the front lens assembly.
Avoid touching the sides of the zoom assembly or the outside of other barrels inside of the zoom assembly. These parts are greased and you want to avoid rubbing off any of this grease to keep the lens zooming smoothly.

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