This is a great theme this week for me because it's something I am working at constantly: tack-sharp focus. There is nothing worse than uploading pictures and realizing when you view them large on the monitor that they aren't as sharp or in focus as you'd thought. This is a particular challenge for me when I'm using my 50mm wide open. I want to get as much light in as possible, but I sacrifice depth of field and it often puts important parts out of focus.
I took a series last night of the boys, and sure enough, the second photo above was one of the few that I felt had the crisp focus I was looking for. I struggle particularly with shots composed with more than one person. You can see in the shot of both boys, the top boy is more in focus than the bottom. Somehow, I can't quite seem to get everyone in focus equally. It seems that if I narrow my aperture, I have to have a longer shutter speed and then things are out of focus because they move -- what's a girl to do?