4. When Taking Macro/Close-Up Photos
Close-up or Macro photography requires you to focus spot-on on the subject or the area you need the maximum sharpness. The problem with using auto-focus in this situation is that it cannot always detect what is most important to you in a macro shot. It usually tends to focus on the center, so you might be better off making the decision by yourself using manual mode.
Manual focus will give you complete control especially when the main subject is very small or exhibits no variation in color, shape, size or brightness. A busy New York street packed with pedestrians is a great example of this situation.