Canon makes it quite easy to view your images on a standard television screen, and not much more difficult on a high definition television (HDTV), as I noted earlier in this chapter. (You have to buy a separate cable for HDTV.) For regular TV, just open the right port cover on the left side of the camera, plug in the cable supplied with the camera into the socket labeled A/V OUT/Digital, and connect the other end to the yellow VIDEO RCA composite jack on your television or monitor.
For HDTV display, purchase the optional HDMI Cable HTC-100 and connect it to the HDMI OUT terminal just below the standard video terminal on the left side of the camera. Connect the other end to an HDMI input port on your television or monitor (my
42-inch HDTV has three of them; my 26-inch monitor has just two). Then turn on the camera and press the Playback button. The image will appear on the external TV/HDTV/monitor and will not be displayed on the camera's LCD. HDTV systems automatically show your images at the appropriate resolution for that set. As described earlier, if you have an HDTV CEC-compatible set, you may also be able to operate your camera's playback features using the TV's remote.
One of the Canon EOS Rebel T2i's best features is the automatic sensor cleaning system that reduces or eliminates the need to clean your camera's sensor manually using brushes, swabs, or bulb blowers (you'll find instructions on how to do that in Chapter 9). Canon has applied anti-static coatings to the sensor and other portions of the camera body interior to counter charge build-ups that attract dust. A separate filter over the sensor vibrates ultrasonically each time the T2i is powered on or off, shaking loose any dust, which is captured by a sticky strip beneath the sensor.
Use this menu entry to enable or disable automatic sensor cleaning on power up (select Auto cleaning to choose power-up cleaning) or to activate automatic cleaning during a shooting session (select Clean now). You can also choose the Clean manually option to flip up the mirror and clean the sensor yourself with a blower, brush, or swab, as described in Chapter 9. If the battery level is too low to safely carry out the cleaning operation, the T2i will let you know and refuse to proceed, unless you use the optional AC adapter kit. (See Figure 3.45.)
Here is where you adjust the Rebel T2i's Live View functions, which enable you to work with a real-time LCD display as you preview and compose your image. I'm going to provide detailed instructions for using Live View in Chapter 5, as some functions are controlled here, and some are set in the Custom Functions menus (described later in this chapter). You'll want to review the Live View section of Chapter 5 for detailed information on how to use the four settings you can make from this menu entry.
■ Live View shoot. Enables Live View. Choose Disable to turn the feature off; select Enable and Live View will be activated when you press the Set (Live View) button.
■ Grid display. Overlays a "rule of thirds" grid on the LCD to help with alignment and composition.
Use this menu choice to activate automatic sensor cleaning or enable/disable it on power up.
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