Yes, we’re bringing up back button focus. This is one of those things that regularly seems to split the camera owning public. One side swears by it, the other side can’t stand it or just doesn’t see the point. But, like many things in photography, it’s just another way of doing something. In this case, focusing your lens.
In this video, photographer Pierre Lambert looks at what back button focus is, and when it might be beneficial to use it. He also looks at when it may be more beneficial to do things the old fashioned way with a half press of the shutter.