Originally posted by hcarvalhoalves I really don't understand the issue with AF points. The camera is not telepathic, it doesn't matter how many points you have, in the end it won't focus where you wanted. The easiest way for me is to focus on center and recompose.
Sure, focus and recompose works great unless your subject is moving around a lot. I don't think most people want a lot of AF points just to have the camera select the "right one" for them for a normal scene, but rather it works like this on at least the cameras I am familiar with:
You pick a focus point, usually the center point, as the starting point. You place your subject (e.g. a bird or a soccer player or something) there and tell the camera to start tracking. Now when the subject moves across the viewfinder the camera will automatically switch which AF point it uses to keep focus on the subject. Soccer player runs to the right, the camera will start switching to the AF points to the right of center, etc. Then there are algorithms and settings that determine how long it will follow the predicted path of the subject before giving up, so if your bird flies behind a tree or a telephone pole, or your soccer player runs behind someone on the field, the camera will keep trying to predict where he/she was headed so that when they reappear it can reacquire focus.
THAT is what the large # of AF points is good for.