I tried to take some portraits of my sister-in and her fiance earlier in a sunny, green park.
I took a few pictures where the fiance is closest to me but turning to look at his wife-to-be who is furthest away from me and peeking from behind a tree.
In the picture, I was trying to get HER in focus, and slightly blur HIM out. However, because she most of the image was in the foreground (i.e. the tree and the guy) my camera refused to let me focus on her, even when I moved the focus square over her.
(I don't have permission to use the exact photo, so I put a sketch effect on it so I could post it and illustrate the setup.)
My question is: How can I pinpoint a spot in an image that I want to focus on - even if there are bigger and more substantial things in the foreground? In particular - how to focus on a person in the background when there are people closer up in the foreground.
I am shooting on a Nikon D7000 with a starter lens.