It used to be that cameras had three or nine focus points, with maybe 30-50 on more top-level professional bodies. Nowadays, cameras have hundreds or even thousands of focus points with nearly limitless ways to combine and arrange them. One of the fundamental choices you will have to make is the size of your focus point, and this excellent video tutorial will help you decide which is right for your work.
[ Read More ](Originally posted by Alex Cooke)