If you like to control exposure, the S4500 does have manual and semimanual shooting modes. (There's a Custom mode, too, so you can define a frequently used group of settings.) For the most part, though, the real control is over shutter speed with settings from 8 seconds to 1/2,000 second. Apertures are limited to two stops at each step of the zoom range through to the 200mm focal length. After that you get three at each step. In both cases the smaller aperture is achieved with a neutral density (ND) filter.