Setting the Focus Mode on the EF 600mm f/4L IS III USM lens

Article ID: ART174557 | Date published: 05/30/2019 | Date last updated: 05/30/2019
 

Description

Setting the Focus Mode on the EF 600mm f/4L IS III USM lens

Solution

Setting the Focus Mode



To shoot in autofocus (AF) mode, set the focus mode switch to AF.
To shoot in manual focus (MF) mode, set the focus mode switch to MF, and focus by turning the focusing ring. The focusing ring always works, regardless of the focus mode.
See THIS ARTICLE for information on power focus.

 
  • Quickly turning the focusing ring may result in delayed focus.
 
  • The lens' focusing ring is electronic.
  • When AF operation is set to [ONE SHOT], manual focus is possible after autofocusing has been completed by continuing to press the shutter button halfway (Full-time manual focus).
    There are times when camera setting changes are required.
  • When the AF button assignment is changed from the "shutter button" (using the camera's Custom Function), manual focus is always possible regardless if the shutter button is pressed halfway any time the lens is not autofocusing.

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