i'd like to learn taking better pictures, so i read lots of infro from internet and they said NEVER use all focus points when shooting portrait, even in a group shots? how that work without some of the people get blurring??
A couple of reasons. First, they are probably using a smaller aperture (bigger f-number) to get a great depth of field. Second, when you focus on a point, you are actually focusing on a 2-D plane. Everything within that plane will be perfectly in focus.
