It didn’t make sense at first. Use the AE button on the back of the camera for focusing? How is that supposed to be easier and/or better than the traditional method of pressing the shutter halfway down? I mean, that’s what I know, that’s what I’ve grown to know, that’s what’s normal! Is this an elitist purist thing? Or is this real? About a year ago, I decided to truly dig deeper into the idea behind back button focus and, well, like a classic case of neuro-plasticity, over the next 90 days, I had inadvertently rewired my brain to wonder the exact opposite of what I was wondering when I started this little experiment…how did I go this long without it?