If you were to look in the index to find out how to set back button focus, that term would not be … I use back-button focusing, so I have this set to only "Metering start". Setting up Back Button Focus on Canon SL1. “how to turn back button focusing on your Canon T4i (650D) Press Menu Navigate to last yellow page (Wrench 4) Select Custom Functions (C.Fn) Navigate to C.Fn IV Operations/Other – Shutter/AE Lock button [6] Select Option 3: AE/AF, no AE lock. The AF-ON button is usually used to initiate autofocus when in Live View mode, but can be set up to initiate focus when pressed. I learned about back button focus very early in the photography career and I could never go back to shooting without it. Then try back button focusing which transfers control away from the shutter button to the AF-ON button. The AF-On button on the Canon 5D Mark III. Anytime Canon puts a slash dividing two buttons in a custom function menu, the listed options on one side of the slash are assigned to the button on the … Want to use autofocus on your Canon EOS camera. This functionality really comes into its own when you need the ability to switch quickly between focussing modes while shooting both moving and static subjects. Here’s how to enable back button focus on a Canon 5D Mark II and a Canon 50D (the settings are identical): Press the “Menu” button. In this article, we will take a closer look at what back-button focusing is, and how you can take advantage of it in your photography. Want to use autofocus on your Canon EOS camera with a greater degree of control? If you use a Canon camera, the process of setting it up for Back-Button Focus starts with the Custom Function Menu. Lexy Savvides/CNET To fully enable back button focus using AF-On only, you will need to disable focusing when pressing the shutter button. The first step of getting set up for back button focussing is to disable this. The AF-On button on the Canon 5D Mark III. These instructions are based on a Canon T3i. If you have any more questions specifically about the M50, try posting on the Canon EOS M forum rather than this one. Use this setting if you’re worried about accidentally re-focusing. The first step is to set up regular the back button AF. Continuous Auto Focus. Use the scroll wheel and choose C.FnIV:Operation/Others. I noticed that AI SERVO is not working on the AF_ON button. Use C.Fn-10 set to option 1. To focus, use the AF-ON button on the back of the camera. Most photographers get by for years without ever thinking about changing how and when the lens is focused. If you don't use back-button focusing currently, you need to. I keep mine at AE lock to only lock the exposure when I half-press the shutter release. There are two ways to focus on a subject: using the shutter button or the (AF start) button. M-Fn button… The objective here is to have independent control of our auto focus and shutter release. That’s what back button auto focus is all about. Thanks to commenter “S” for testing this and reporting back to me. Once focus is achieved, as long as you keep depressing the focus button, focus will be maintained using other focus points as the target moves off the center point. One button we use to focus and another button … Now select the option ‘Shutter button/AF-ON button’. Press the back focus button once to lock in focus on a fixed subject. Canon was the first camera manufacturer to implement back button focus in 1989 and has put the feature in all DSLR models made in the last 8 or 9 years (yes, even the Canon Rebel XT and XTi). In the Custom Controls screen… What Does the “Info” Button do on My Canon Rebel DSLR Camera. 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