James Brandon writes,
Over the past couple of years I’ve become a huge advocate for making the switch to back button focus. It was one of the most revolutionary changes I ever made to how I take pictures. It seems like such a small thing, yet it’s such a huge difference in the way your camera works. I honestly don’t know why this isn’t the standard setting on all cameras because after getting acclimated to this setting, I honestly can’t understand the meaning for or use of the ‘shutter half way down’ method.