Convention says that autofocus is initiated by a half-press of a camera\u2019s shutter release button, but this is not the only way of doing things. Some photographers prefer to take focusing away from the shutter release and instead assign this to a button on the rear of the camera \u2013 a process that\u2019s called back-button focusing.<\/p>\n\n\n\n
Before we look at why you might want to shoot in this way, let\u2019s look at a couple of methods for setting up back-button focusing on your camera.<\/p>\n\n\n\n
This method involves programming a function button to start autofocus, and removing AF-On from the shutter release button. Both these things are done in the Custom Function menu, as follows:<\/p>\n\n\n