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Canon CA2-6822 Collar Screw

$7.43
Genuine Canon collar retaining screw for the EF 100-400 4.5-5.6 L IS USM lenses and other Canon imaging products. Made by Canon Japan. Package of 1 screw. Made by Canon Japan. Use with collar CA2-6842, in stock here.

Canon CY1-2428 Lens Mount

$48.91
Genuine Canon lens mount for the EF 70-200 4.0 L USM, EF 100-400 4.5-5.6 L IS USM, and other EF lenses. Made by Canon Japan. See the detail chart below for the proper place to measure your lens mount. Then choose from the most popular sizes. We stock the most requested mounts 2.10, and 2.60.  We can order other sizes available. Canon CY1-2428 Lens Mount Spec

Canon CY1-2833 Focus Ring

Genuine Canon focus ring unit for the EF 100-400 4.5-5.6 L IS USM lenses. Made by Canon Japan. This part has been discontinued without a replacement.

Canon CY1-2837 Fixed Barrel

Genuine Canon fixed barrel assembly for the EF 100-400 4.5-5.6 L IS USM lenses. Made by Canon Japan. This part was discontinued in 2021.

Canon Screws EF CA2-4924

$3.73
Genuine Canon replacement screws for the EF 100-400 4.5-5.6 L IS USM and other Canon imaging products. Package of 1 screw  

Canon YA2-3629 Zooming Ring

$41.11
Genuine Canon zooming ring for the EF 100-400 4.5-5.6 L IS USM lenses. Made by Canon Japan.

Canon YA2-3631 Front Ring

$11.44
Genuine Canon front ring for the EF 100-400 4.5-5.6 L IS USM lenses.  This ring clips to the front lens group assembly. Made by Canon Japan.

Canon YA2-3645 Focus Key

$9.08
Genuine Canon focus key for the EF 100-400 4.5-5.6 L IS USM lenses. Made by Canon Japan.

Canon YA2-3659 I-FLEX Holder

$5.19
Genuine Canon I-FLEX holder for the EF 100-400 4.5-5.6 L IS USM lenses. Made by Canon Japan.