Canon EF24-105MM Instruction page 10

8. Hood
The EW-83H hood can keep unwanted light out of the lens, and also protects the lens from rain,
snow, and dust.
To attach the hood, align the hood's attachment position mark with the red dot on the front of the
lens, then turn the hood clockwise until the lens's red dot is aligned with the hood's stop position
mark.
The hood can be reverse-mounted on the lens for storage.
¡Part of the picture may be blocked if the hood is not attached properly.
¡When attaching or detaching the hood, grasp the base of the hood to turn it. To prevent deformation, do not
grasp the rim of the hood to turn it.
ENG-9