Canon EF 300mm f/4L IS USM ■Attaching the lens to the camera, ■Detaching the lens, 1.Attaching and Detaching the Lens, ENG-4, 1 Remove the lens dust cap by turning it counterclockwise

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1.Attaching and Detaching the Lens

■Attaching the lens to the camera

1 Remove the lens dust cap by turning it counterclockwise.

2 Align the lens mount index with the red dot on the camera. Then turn the lens clockwise until it locks in place.

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3 Remove the lens cap by pressing both clasps.

■Detaching the lens

Hold down the lens release button on the camera and turn the lens counterclockwise until it detaches.

•After detaching the lens, attach the dust cap to the rear of the lens to protect the electrical contacts and lens surface from scratching.

•If the contacts are dirty, scratched, or soiled with fingerprints, etc., corrosion or a faulty connection or operation may result.

•If the lens surface is dirty, the lens may not autofocus properly.