What is back / rear button focusing?
Back button or Rear button focusing is a method of autofocusing used by many photographers. It decouples the autofocus from the shutter button, so a separate button on the back of the camera is used for focusing, while the shutter button is just used for taking photos.
In this article we'll look in more detail at the back button focus method. We'll cover why many photographers prefer this method over the standard half-press of the shutter button for autofocus. And also cover some situations where it doesn't work so well.
