Canon EOS 7D Mark II Guía De Instrucciones página 46

Attaching and Detaching a Lens
Attaching a Lens Hood
A lens hood can block unwanted light and prevent rain, snow, dust, etc.
adhering to the front of the lens. Before storing the lens in a bag, etc.,
you can attach the hood in reverse.
If the Lens and the Lens Hood Have a Mount Index
If the hood is not attached properly, it may obstruct the image's
periphery, making the image look dark.
When attaching or detaching the hood, grasp the base of the hood when
turning it. Grasping the hood's edges when turning it may deform the
hood, resulting in failure to turn.
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Align the red dots, then turn the
1
hood as shown by the arrow.
Align the red dots on the hood and
lens edge, then turn the hood as
shown by the arrow.
Turn the hood as shown in the
2
illustration.
Turn the hood clockwise until it
attaches securely.