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Canon® EOS Rebel XSi/450D Guide to Digital SLR Photography by David D. Busch

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Auto Power Off

This setting allows you to determine how long the Rebel XSi remains active before shutting itself off. As you can see in Figure 3.21, you can select 30 seconds, 1, 2, 4, 8, or 15 minutes, or Off, which leaves the camera turned on indefinitely—or until 30 minutes have passed. However, even if the camera has shut itself off, if the power switch remains in the On position, you can bring the camera back to life by pressing the shutter button halfway, or the DISP., Playback, or Set buttons.

Figure 3.21. Select an automatic shut-off period to save battery power.

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