A professional photographer would be someone who shoots for penthouse, playboy or a person who is an expert studio lighting. It's doubtful there are more than a few of those around here.
I take my time and frame the shots as I go but sometimes have to crop afterwards. I usually end up at f8-f11 and have good focus on ass and face shots. These amateur photogs who think they are pros cuz they shoot on f4 are just plain fooling themselves.