Close up, close-up, or closeup? I finally decided to check myself on this. Turns out dictionaries mostly think close up is something you do to a box or bottle. Close up that cereal box! But the other two choices are just that - your choice. Depending on the authority you consult, it can go either way. You're on your own. Either way, fun for us camera captives. Like this silver maple, always a favorite because it surprised me so well when I did get close.