It's actually a really simple idea.
Just move your Auto-Focus from the shutter button, to the back AF-ON button.
First off, it makes it easier to lock-in pre-focus.
See how much more simple that is?
You now have complete control over the focus!
Back-Button Auto Focus
Simplify and strengthen your focus skills with back-button AF.[IMG]http://images.newschoolers.com/images/17/00/03/81/81/38181.jpeg[/IMG]
