Web Reference: Nov 10, 2025 · Back-button focus is a camera technique that separates focusing and shutter release to two separate buttons. It is a useful way to stop the camera’s autofocus system from getting continuously engaged when the shutter is released. I walk you through step by step how to set up dual back button auto-focus for the Canon R6 mark ii in this short tutorial video! Which button is used for back-button AF? Once you’ve activated this feature, you press one of two buttons: either the rear AE Lock button (marked with an asterisk or star icon), or if your camera is equipped with it, the rear AF-ON button.
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