Following are three pics of people. I thought you guys might appreciate the different approachs. First pic. Little girl on a carousal. Using a fairly slow shutter speed of 1/30 sec. renders the subject sharp while the moving background blurs out. 50mm lens. Second pic. Little boy. 135mm lens. I loved the fact that his face was covered with candyapple residue and he's holding a red balloon. The telephoto lens blurs the background due to the shallow depth of field that is inherent in telephoto lenses. I also shot with the aperture pretty wide open to ensure the background would be nice and soft. Third pic. Nothing unusual, just that I wanted the man's environment to be part of the pic. 24mm lens. Wide angle lenses have a lot of depth of field.