I have been using it for a couple of years now, and even if I switch back to the shutter button for a day I now find my thumb hitting the back button automatically
When you first start make a note, I was out and it took me about 10 minutes to figure out why the camera would not focus.
I started using it about 2 years ago and wished I had done it sooner. Its especially great when your photographing a particular thing you don't have to worry about refocusing it every time you hit the shutter button
DOES ANYONE USE THIS FEATURE? HEARD IT IS GREAT. LIKE TO KNOW PROS & CONS. THANKS
I use it all the time as well....learned this a few months ago, and now it is simply habit. However, I just enabled yesterday an interesting menu item. Since the AE-AL button is now assigned to AF-ON, I have no exposure lock. I found that I could assign the shutter button - half-way point, to be the AE-L. So now I have the best of both worlds...BBF and AE-L! Really helps with composition as I can now compose the focus, and then assign exposure, and then take a picture.
The only negative thing about BBF is that using a remote shutter release will not activate auto focus. You must either revert to as it was or pre focus manually. Also, letting someone else take a shot with your cam may be confusing to that person
DOES ANYONE USE THIS FEATURE? HEARD IT IS GREAT. LIKE TO KNOW PROS & CONS. THANKS
Okay Okay. We can hear you! Please don't YELL.
Anyway. Use back button focus exclusively. That way when I recompose after selecting my focus point, I don't have to worry about autofocus kicking in when I push the shutter button.