Canon EOS Rebel T3i EOS REBEL T3i / EOS 600D Instruction Manual - Page 163

White and Red Internal Temperature Warning Icons If the camera's internal temperature increases due to prolonged movie shooting or a high ambient temperature, a white icon will appear. Even if you shoot a movie while this icon is displayed, the movie's image quality will not be affected. However, if you shoot still photos, the image quality of the still photos may deteriorate. You should stop shooting still photos and allow the camera to cool down. If the camera's internal temperature further increases while the white icon is displayed, a red icon may start blinking. This blinking icon is a warning that movie shooting will soon be terminated automatically. If this happens, you will not be able to shoot again until the camera's internal temperature decreases. Turn off the power and let the camera rest for a while. Movie shooting at a high temperature for a prolonged period will cause the and icons to appear sooner. When not shooting, turn off the camera. Movie Shooting Cautions Recording and Image Quality If the attached lens has an Image Stabilizer, the Image Stabilizer will operate at all times even if you do not press the shutter button halfway. The Image Stabilizer will thereby consume battery power and may shorten the total movie shooting time or decrease the number of possible shots. If you use a tripod or if the Image Stabilizer is not necessary, you should set the IS switch to . The camera's built-in microphone will also record camera operation noise. Using a commercially-available external microphone can prevent (or reduce) these noises from being recorded. Do not connect anything other than an external microphone to the camera's external microphone IN terminal. If movie shooting is not possible due to insufficient remaining capacity of the card, the movie recording size and movie shooting remaining time (p.146) will be displayed in red. 163