You’ll find five methods for choosing the appropriate shutter speed and aperture within the Creative Zone settings. Just spin the Mode dial to choose the method you want to use. (See Figure 4.12.) Your choice of which is best for a given shooting situation will depend on things like your need for lots of (or less) depth-of-field (DOF), a desire to freeze action or allow motion blur, or how much noise you find acceptable in an image. Each of the Rebel XSi’s exposure methods emphasizes one aspect of image capture or another. This section introduces you to all five.