Canon RF15-30mm F4.5-6.3 IS STM Instruction Manual - Page 16

6. Hood (Sold separately) The custom lens hood reduces unwanted light that causes flare and ghosting and protects the front of the lens from rain, snow, and dust. Attachment position mark Red dot Red dot Red dot Attachment position mark Stop position mark Attaching the Hood Align the red attachment position mark on the hood with the red dot on the front of the lens, and then turn the hood in the direction of the arrow until the red dot on the lens is aligned with the stop position on the hood and the hood is firmly attached. Detaching the Hood Rotate the hood in the direction of the arrow until the hood attachment position mark is aligned with the red indicator on the front of the lens to remove it. The hood can be reverse-mounted on the lens for storage. z If the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur. z Grasp and turn the base of the hood when attaching and detaching it. There are cases in which it may become deformed if the hood is turned with it grasped near to the rim. ENG-15