Canon's Digital Elphs are usually designed for snapshot photographers who don't want to fuss with settings. The SD4000 IS breaks that tradition by offering Shutter-speed- and Aperture-priority modes. Shutter speeds can be set from 15 seconds to 1/2,000 second. Apertures include f2.0, f2.2, f2.5, f2.8, f3.2, f3.5, f4, f4.5, f5, f5.6, f5.9, f6.3, f7.1, and f8. With the lens fully extended, you just get five, though: f5.3, f5.6, f6.3, f7.1, and f8.0. Being able to control shutter speed is great for freezing or blurring motion, while the aperture control gives you the ability to select how much of a scene you want in focus.