Canon EF 70-300mm f/4-5.6 IS II USM User Manual - Page 20

9. Hood (sold separately) The ET-74B hood cuts out unwanted light and protects the front of the lens from rain, snow, and dust. Red dot Stop position mark Red dot Attachment position mark ● Attaching Align the red attachment position mark on the hood with the red dot on the front of the lens, and then rotate the hood in the direction of the arrow until it is firmly attached with the red dot and stop position mark on the hood aligned. Button ● Removing Keep your finger pressed down on the button located on the side of the hood, and then rotate the hood in the direction of the arrow until the attachment position mark on the hood is aligned with the red dot on the front of the lens to detach it. The hood can be reverse-mounted on the lens for storage. ●● If the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur. ●● Grasp and rotate the base of the hood when attaching and detaching it. There are cases in which it may become deformed if the hood is rotated with it grasped near to the rim. ENG-19