You can watch the video here on the blog or directly from YouTube here.
And here is a quick written overview of back button focusing.
What exactly is back button focusing?
This is a technique where you change the setting of your camera so that the shutter button triggers the shutter but does not initiate the focusing of the camera. Instead, the autofocus of the camera is initiated with a separate button. In my case, I choose to use the AF-On button on the back of the camera.
Why would you want to turn off focusing from the shutter release button?
Because there are many times when you will want to prefocus on a spot and then shoot without having to wait for the camera to achieve a focus. Using the back button focus technique, you can set a point and then shoot (and reframe) as much as you want without having the camera change the focus.
There are many times when I shoot in Servo focus (otherwise known as follow focus) where the camera will change the focus depending on where my lens is pointed. I like the having the ability to use this at some points while shooting and not at others.
If I am shooting an event where the subject are at the front of the Temple or Church, I like locking the focus on them and knowing the shutter button will only be used for capturing photos. This is similar to turning off the AF switch on the lens. I can use the back button to focus or manually focus.
I hope this helps all of you!
If you are interested in purchasing any camera equipment, please click here to go to B&H Photo, as I get a referral from them if you enter this way. I would really appreciate that.