In one photograph, National Geographic's Tim Greenleaf has captured almost everything that makes wildlife photography one of life's most rewarding and frustrating pursuits. Now, there's a good chance the shooters are capturing exactly what they want. Heck, there's almost no chance that lens would be able to even focus on an elephant that close to the front element, but that pachyderm is an incredible reminder of just how hard it can be to truly commit to one subject until you've gotten the shot that you're after. We've all had experiences where we were shooting one thing when we should've been focused on another. Feel free to leave your stories in the comments.