This easily allows the AF-ON button to be used for back-button focusing. If the camera has an AF-ON button, this button by default engages autofocus even when the camera is set to manual focus. The first method (and the one I prefer using), is by switching from autofocus to manual focus using the switch on the front of the camera (“M” position).
Fujifilm AF-ON Buttonįujifilm users have two ways to set up back-button focusing. Once you do that, the camera will engage autofocus when the AF-ON button is pressed, effectively enabling back-button focusing. Second, you will need to navigate to the AF-ON button option and set it to “Metering and AF start”: This decouples focusing from the shutter-release button, and engages autoexposure lock when half-pressed. First, you will need to navigate to the first shutter-release option (labeled as “Shutter button half-press”), then set it to anything other than “Metering and AF start” (I set mine to “AE lock”). To set the camera up for back-button focusing using the AF-ON button exlusively, you will need to perform two steps. However, the name of the AF-ON button will still stay the same, as shown in the below screenshot: If you use a Canon mirrorless camera such as the EOS R6, then the custom controls page will look slightly different.
Once you navigate there, you will find the AF-ON button setting as one of the selections: If you use a Canon DSLR or a mirrorless camera, you can change the behavior of the AF-ON button through the camera menu’s “Custom Controls” sub-menu. In the next few sections, we will take a closer look at where you can access the AF-ON button settings in the camera menu when using cameras from different manufacturers. While many photographers, including myself, use this button for back-button focusing, it can be programmed for different functions such as autofocus or autoexposure lock. When focusing is de-coupled from the shutter release, it essentially becomes a setup for back-button focusing. Since the shutter release is set to engage autofocus when half-pressed by default, the AF-ON button is redundant, unless focusing is de-coupled from the shutter release, or it performs some other function. The AF-ON Button (circled in red) on a Nikon DSLR camera It is used for engaging autofocus and metering, although its function can be re-programmed for some other purpose on more advanced digital cameras. On all modern digital cameras, the AF-ON Button stands for “Autofocus On”.
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