Hello, I need to take pictures of a cut on a babies arm for a custody hearing. I am doing this is a favor for the Dad. I have an 18-200 VR lens and a 50 1.8 lens. I have a set of extension tubes and a SB-600. What lens should I use, extension tubes? Flash? EDIT: Thanks everyone, I took the pictures yesterday and they turned out pretty good. I talked to the guys lawyer and he said if he needs me he will be in touch. Thanks for all the help.