Canon EOS Rebel T6i W Instruction Manual page 47

Attaching a Lens Hood
A lens hood can block unwanted light and prevent rain, snow, dust, etc.
adhering to the front of the lens. When storing the lens in a bag, etc.,
you can also attach the hood in reverse.
If there is no index mark on the lens and hood:

If there is an index mark on the lens and hood:

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 to

turn it. Grasping the hood's edges to turn it may deform the hood,
resulting in failure to turn.
When using the camera's built-in flash, detach the hood. Otherwise, the

hood will obstruct part of the flash.
Attach the lens hood.
Turn the hood as shown by the arrow

to attach it securely.
Align the red dots on the hood
1
and lens edges, 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.
Attaching and Detaching a Lens
47