Hi all, I'm still working on figuring out the best way to make sure I get sharp photos and don't miss focus. Someone suggested back button focus. I want to try it out and I figured out how to change the custom function to switch it, but I thought it would make it so that pushing that one button would change the focus point, but didn't. I find it difficult to change the focus point while looking through the view finder. Any help or resources on this? TIA!