The XTi’s weight is still very modest although it has increased by 25 grams to 510g/18 oz., excluding battery pack, CF card and body cap, but including the backup battery and the eyecup.
While based on the Digital Rebel XT’s electrical components, the XTi’s electrical com- ponents are compatible with several significant new features, such as the 10.10- megapixel CMOS sensor, Self Cleaning Sensor Unit, Display-off sensor, and the 2.5- in. LCD screen. As with the XT, the XTi's main circuit board is a highly-integrated 8- layer board fitted with the digital control circuit, camera control circuit, image-signal processing circuit, and DC/DC converter circuit. In addition, there are five hard boards, and sixteen flexible boards.
| SDR SDRAM | | |
| | | Self Sensor Cleaning Unit |
| | Flash Circuit Board | Circuit Board |
| DIGIC II Image Processor | | |
Main board (top) | Main board (bottom) | External Interface | |
| | |
| | Connection | |
| | Circuit Board | Motor Drive Board |
| | |
Interface The USB 2.0 Hi-Speed, mini B port enables high-speed image transfers from the camera to a personal computer (see Direct Image Transfer) using Interface Cable IFC-400PCU (included). Also, the PTP protocol is now used for both Camera Direct printing and transmissions to a personal computer, making it unnecessary to switch the communica- tions setting.
An NTSC/PAL video output terminal is provided; it uses Video Cable VC-100 (included).
The remote control terminal is compatible with Remote Switch RS-60E3 (2.5 mm dia. mini jack, optional***). Wireless remote control is compatible with Remote Controllers RC-1 and RC-5 (optional). The wireless remote control receiver is built inside the camera grip. The system is compatible with all shooting modes and works within approx. 5 m/16.4 ft. (at front and center). When the Drive mode button is pressed, the self- timer/wireless remote control timer icon is displayed on the LCD screen.
Drive and Power Source The maximum continuous shooting speed of the Digital Rebel XTi is approx. 3 fps (in both the One-Shot AF and AI SERVO AF modes), the same as the Digital Rebel XT in spite of the larger files the XTi generates. This is achieved by a number of features: the reflex mirror drive and shutter drive are controlled independently; the advanced, Canon- designed and -manufactured CMOS sensor enables high-speed signal reading, and the DIGIC II image processor performs high-speed image processing.
To limit the increase in power consumption required by high-speed reading, the output amp's power consumption has been minimized. Further, during long exposures, power
