Canon LP-E5 EOS DIGITAL REBEL XSi/EOS 450D Instruction Manual - Page 100

ShootingN Battery Life with Live View Shooting [Approx. number of shots] Temperature Shooting Conditions No Flash 50% Flash Use At 23°C / 73°F 200 190 At 0°C / 32°F 190 180 The figures above are based on a fully-charged LP-E5 battery and CIPA (Camera & Imaging Products Association) testing standards. Autofocusing will decrease the number of possible shots. When you use Live View shooting for a long period, the camera's internal temperature may increase and it can degrade image quality. Terminate Live View shooting when not shooting images. Before taking a long exposure, stop Live View shooting temporarily and wait several minutes before shooting. High temperatures, high ISO speeds, or long exposures may cause noise or irregular colors in the image captured with Live View shooting. If you take the picture while the image is magnified, the exposure might not come out as desired. Return to the full view before taking the picture. During the magnified view, the shutter speed and aperture will be displayed in red. Even if you take the picture during magnified view, the captured image will reflect the full view. The focus preset feature on super telephoto lenses cannot be used. For Live View shooting, do not use an Extension Tube or TS-E lens. Doing so can cause irregular or unintended exposures. FE lock and modeling flash (with an external Speedlite) cannot be used. A non-Canon flash will not fire. A grid can be displayed. Under [6 Live View function settings], set [Grid display] to [On]. You can change the metering timer. Under [6 Live View function settings], set [Metering timer]. When you take a picture with flash, it will sound like two pictures were taken. However, only one picture is taken. 100