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THE CANON EOS DIGITAL REBEL XT CAMERA: AN EXCEPTIONAL COMBINATION OF DESIGN, PERFORMANCE AND AFFORDABILITY

Table of Contents

I OVERVIEW II SUMMARY OF NEW AND IMPROVED FEATURES Design Image Recording Image Processing Enhanced User Controls Flash Performance Connectivity and Compatibility Power Issues Software Package III FEATURE DISCUSSION New 8 Megapixel Image Sensor New DIGIC II Imaging Processor Autofocus E-TTL II Autoflash White Balance Controls Processing Parameters Custom Functions Menus Image Display Exposure Controls Power Management Recording System Design and Construction Interfaces and Compatibility Camera Direct Printing Software IV CONCLUSION
Contents 2005 by Canon U.S.A., Inc. All Rights Reserved. Excerpts from this material may be quoted in published product reviews and articles. For further information, please contact Canon U.S.A., Inc. Public Relations Dept., (516) 328-5000.

I. OVERVIEW

Canons EOS Digital Rebel XT camera combines outstanding performance and creative control in a small and elegant package for an estimated retail price of under $1,000* complete with zoom lens. This makes the XT an exceptional value in digital single lens reflex cameras. With its DIGIC II image processor and Canon-designed and manufactured CMOS sensor, the EOS Digital Rebel XT camera has very high 8.0 megapixel resolution, low noise, exquisite color, near-instantaneous startup, speedy handling, enhanced flash control, an extensive range of settings, full compatibility with EOS system accessories, reduced power consumption and an ease of use which makes it truly remarkable. The Digital Rebel XT cameras closest relatives in the Canon DSLR lineup are the original EOS Digital Rebel and the EOS 20D models. The original Digital Rebel is the breakthrough camera that established the under $1,000 category for DSLR (Digital Single Lens Reflex) cameras when it was introduced in 2003. It has 6.3 megapixel resolution, wonderful picture quality and true ease of use. The Digital Rebel remains in the Canon lineup at a new, lower price point (estimated retail price $799* with EF-S 18-55mm zoom lens). The EOS 20D body has an estimated retail price of $1599* (with the EF-S 18-55mm lens) and is faster than the Digital Rebel XT (5 frames per second vs. 3), shoots longer bursts (23 Large/Fine JPEGs vs. 14), focuses faster, has more extensive Custom Functions (18 vs. 9) and magnesium alloy body covers (vs. polycarbonate for the Digital Rebel XT). The 20D has 8.2 megapixels to the 8.0 of the XT; the sensors have the same size pixels. The 20Ds aficionados include advanced amateurs, prosumers and professionals who need to keep an eye on equipment expenses. Of course, all these cameras have full compatibility with the vast system of Canon EF and EF-S lenses, as well as many other EOS system accessories. (* Actual selling prices are set by the dealer and may vary.) The EOS Digital Rebel, EOS Digital Rebel XT and EOS 20D are members of a family that also includes the 8.2 megapixel, 8.5 frames per second EOS-1D Mark II and the 16.7 megapixel EOS-1Ds Mark II. These cameras, and an extensive line of consumer-focused digital point-andshoots, have propelled Canon to the number one position in the digital camera business according to the NPD Group, a leading provider of retail market information. In 2004, Canon had 20.4 percent of total digital camera sales, based on

Digital Rebel

Digital Rebel XT

1D Mark II

1Ds Mark II
unit sales and revenue figures of both compact cameras and digital SLR cameras combined, according to NPD. In addition, Canon had 62.8 percent of the DSLR market and 18.6 percent of the point-and-shoot market, also both number one according to NPD. Further, according to NPD, Canon had the single best selling digital camera, the PowerShot A75, as well as the best selling digital SLR, the EOS Digital Rebel. This sell-through data is testimony to the extent to which consumers and professionals alike recognize Canon as the imaging industry leader. For example, the readers of PC Magazine recently gave Canons digital cameras their highest rankings in quality, reliability and support in an annual customer satisfaction survey. In 2004, Canon digital cameras were also honored by Macworld, C/NET, American Photo, PC World, Mobile PC Magazine, Best Magazine, Popular Science, Outside Magazine and PTN Magazine, among others. Canon is listed as one of Fortunes Most Admired Companies in America and is number 35 on Business Weeks 2004 list of Top 100 Brands. Only Canon Could Produce the EOS Digital Rebel XT In 2004, IBM received the most U.S. patents, as it had in each of the previous ten years.1 Canon was third. In the past ten years, Canon has been second on six occasions and third on four. Considering the differentials in size, sales volume and R&D investment levels between Canon2 and IBM3, Canons performance in this category is nothing short of phenomenal.

Image Recording

Entirely new 8.0 million pixel CMOS sensor designed and made by Canon with improved microlenses and 2nd-generation on-chip noise reduction technology New DIGIC II image processor provides enormous speed gains, improved color reproduction, precisely optimized white balance and expanded dynamic range Maximum shooting speed: 3 frames per second with a burst rate up to 14 frames in Large/Fine JPEG, 5 frames in RAW or 4 frames in RAW + Large/Fine JPEG New, high-performance, 3-layer optical low-pass filter, the same quality used in top-of-the-range Canon DSLRs, provides high resolution while minimizing false colors Startup time now approximately 0.2 seconds Shutter release time lag reduced from about 120 milliseconds to 100 milliseconds (compared to Digital Rebel) Viewfinder blackout time reduced from about 225 milliseconds to 170 milliseconds (compared to Digital Rebel) CF card data-writing speed approximately 3.5 times faster than Digital Rebel New RAW + JPEG setting with separate Large/Fine quality JPEG files written, rather than embedded, and saved as separate files on the CF card No dedicated application needed to extract JPEG data

Image Processing

Improved auto white balance performance, especially at higher ISO ratings and in conjunction with flash color data transmission from the built-in flash or the accessory 580EX Speedlite
New white balance correction, same as on EOS 20D, allows fine tuning in Blue-Amber and/or Magenta-Green color ranges, +/- 9 levels New white balance bracketing in Blue-Amber or Magenta-Green direction, +/- 3 steps White balance bracketing can be used in combination with white balance correction Six image processing Parameter Sets provide complete control of sharpness, contrast, saturation, and color tone New monochrome Parameter Set allows Standard B&W, B&W with filter effects or B&W with toning effects Custom Function 2 provides optional dark frame subtraction noise reduction at shutter speeds longer than 1 second Enhanced

Enhanced User Controls

Connectivity and Compatibility
New USB 2.0 Hi-Speed interface, ten times faster than original Digital Rebel New recording format DCF 2.0 with Exif 2.21 supports Adobe RGB color space One-touch direct print capability with PictBridge support, via new Direct Print button Faster direct printing speeds than with EOS Digital Rebel camera.

Power Issues

EOS Digital Rebel XT camera uses one NB-2LH rechargeable Lithium-Ion battery, smaller and lighter than BP-511 of EOS Digital Rebel camera EOS Digital Rebel XT consumes 35% less power than original Digital Rebel, primarily because of DIGIC II XT battery life with NB-2LH battery pack is the same as the Digital Rebel with BP-511 battery pack (600 shots w/o flash; 400 shots w/50% flash) New accessory BG-E3 battery grip works with either six AA batteries, or up to two NB-2LH batteries which double shooting capacity Accessory AC Adapter Kit ACK700 enables camera to be powered by an AC outlet

Software Package

New software package includes Canons Digital Photo Professional Version 1.6 plus EOS Digital Solutions Disk Version 10, featuring ZoomBrowser EX 5.1, ImageBrowser 5.1, CameraWindow 5.1, PhotoRecord 2.2, RAW Image Task 2.0, EOS Capture 1.3, PhotoStitch 3.1, TWAIN and WIA drivers, ArcSoft PhotoStudio 5.5, and a separate CD containing instruction manuals for all included software

III. FEATURE DISCUSSION

New 8 Megapixel Image Sensor

CMOS Sensor

The component of the new Canon EOS Digital Rebel XT camera that will receive the most first-look attention is the all-new, Canon-designed and manufactured, 8.0 effective megapixel, single-plate, CMOS sensor. It has a 2:3 aspect ratio (the same as 35mm film), with 2312 x 3472 effective pixels. The imaging surface is 22.2 mm by 14.8 mm, giving a focal length conversion factor of 1.6x. Each pixel is a generous 6.4 m square.
Several engineering features account for the sensors wide ISO range (100 to 1600), low noise, high dynamic range, and low power consumption. The configuration of each photo diode in each pixel has been optimized; detail processing has been improved, and a greater portion of each pixel is now sensitive to light. The microlens array which gathers light for the sensor has a new design, shared with the microlenses in the EOS-1Ds Mark II, 1D Mark II and 20D that reduces the gaps between the lenses. This narrow-gap array gathers light more efficiently and loses less light between the lenses.

1st-generation on-chip noise-reduction circuit 2nd-generation on-chip noise-reduction circuit
Noise reduction by amplifying the signal in slow-read steps
To minimize the increase in power consumption caused by upgraded components such as the larger sensor and the faster reading of the sensors output, the output amps power consumption is kept to an absolute minimum. As with the EOS 20D, power to the output amp is cut off and circuit-driving standard current is also cut off during long exposures. Less power is used and noise is further reduced. New DIGIC II Image Processor The DIGIC II Image Processor brings a host of significant improvements in speed of operation, control, noise reduction and image quality to the EOS Digital Rebel XT camera. The camera starts up in a near instantaneous 0.2 second. Its shutter release lag time is now only 100 milliseconds and viewfinder blackout time has been reduced to 175 milliseconds. The EOS Digital Rebel XT DIGIC II Image Processor camera can shoot up to 3 frames per second at its full JPEG Large/Fine 8 megapixel resolution. The DIGIC IIs major reduction in buffer clearance times and its huge increase in write speed to the CompactFlash card enable a burst performance of 14 consecutive frames for 8 megapixel JPEG Large/Fine files and 5 consecutive frames for 8 megapixel RAW files. The DIGIC IIs newly-developed algorithm also yields improve color reproduction, especially with high-saturation, bright subjects, improved auto white balance precision for a wide range of scenes and light sources, and wider dynamic range in highlight areas.
Fixed-Pattern noise-reduction circuit Low-noise high-speed amp
Fixed-Pattern noise-reduction circuit 1
Low-noise gain amp 2 Offset reduction circuit 3 Low-noise high-speed amp 4

Autofocus

With the addition of the DIGIC II and some fine-tuning, the AF system of the EOS Digital Rebel camera has been adapted to the Rebel XT camera and is fully compatible with the handling speed of the new camera. The EOS Digital Rebel XT camera uses the same 7-point, TTL-CT-SIR (TTL Cross Type secondary image registration) AF sensor as the EOS Digital Rebel camera, as well as the same 32-bit RISC (reduced instruction set) microcomputer. The AF speed and predictive AF performance are faster than or equal to the previous camera. With an EF 300mm f/2.8L IS USM lens, it can focus track a subject approaching at 186 mph up to about 66 feet away. The brightness range required for focusing is EV 0.5 to 18.

4.4 7.34

Predictive AI Servo AF

186mph

66 ft. 62mph
Approaching Subject Speed

38 ft.

26 ft.
Closest distance to the camera for continuous AI Servo AF (w/ EF 300mm f/2.8L IS USM)
*According to a test of all movable mirror type SLR cameras made by Canon (Feb.1, 2000).
In the Creative Zone modes, the user can now select the AF mode: One-Shot AF (When focus is achieved, the AF operation stops and focus is locked), Predictive AI Servo AF (tracks movement and focuses continuously until the start of the exposure), or AI Focus AF (automatic selection of One-Shot AF or Predictive AI Servo AF based on analysis of subject movement). As with the EOS Digital Rebel camera, the EOS Digital Rebel XT cameras predictive AF computation uses statistical prediction that samples the focusing data at a very rapid rate. If focusing operations are repeated in a short period of time, the predictive AF control can operate more effectively from the first shot, even for a subject moving erratically. Additionally, even if the subjects movement changes just before the shutter is released, the predictive AF control will have a good chance of catching it.
The AF point can be selected manually with the cross keys on the back of the camera, or with the electronic dial. The user can avoid pressing the AF point selection button before using the cross keys to select an AF point by activating Custom Function 1-4. The AF point selection operation with the cross keys is similar to the EOS ELAN 7N. With the electronic dial, AF point selection is the same as with the EOS Digital Rebel camera.

[With cross keys]

Automatic AF point selection Automatic AF point selection Automatic AF point selection Automatic AF point selection

[With main dial]

Automatic AF point selection
To enable manual focusing with the focusing ring, the lens focus mode is switched to M or MF (with Canon EF and EF-S lenses). When focus is achieved, the focus confirmation icon and superimposed display light up. The AF-assist beam is a series of stroboscopic flashes from the builtin flash or a near-IR patterned LED with a compatible accessory Canon Speedlite. With the built-in flash, the working range of the AF-assist beam is approximately 4 meters/13.2 feet at the center and 3.5 meters/11.5 feet a the other 6 AF points. Firing stops when the focus detection confirmation signal is detected.

E-TTL II Autoflash

The EOS Digital Rebel XT camera incorporates the E-TTL II autoflash system used in the EOS-1D Mark II, EOS-1Ds Mark II and EOS 20D. It is truly remarkable that such a sophisticated algorithm has been included in a camera at the XTs price point. E-TTL II takes effect when the built-in flash or an accessory EX-series Speedlite is used. E-TTL II does not assume that the AF point in use covers the main subject. Instead, when the shutter button is pressed completely, ambient light is measured just before a pre-flash fires. For each metering zone, the ambient reading and the pre-flash reading are compared. Areas having a large difference between ambient and pre-flash readings are selected and analyzed. Extreme differences suggest a highl reflective or specular object; these areas are eliminated from calculations, avoiding underexposure. When a lens providing distance information is used, this data is also considered in determining

the presence and location of a high-reflectance object. The selected pre-flash readings are added and averaged and the output of the main flash is calculated. Even if the subject changes position, reflectance or size, the flash metering remains highly accurate and stable. Some other highly useful changes to the flash system of the EOS Digital Rebel camera have occurred: User-adjustable flash exposure compensation up to +/- 2 stops in 1/3 or 1/2 stop increments has been added. Second-curtain flash synch has been added, via Custom Function 9-1. This function is effective with the built-in flash and also with EX-series Speedlites that lack secondcurtain sync control. The built-in flash has greater coverage, now handling a 17mm focal length, and the flash head has been raised 5.5mm higher than the Digital Rebel, reducing red-eye and eliminating blockage of flash illumination when using the EF-S 18-55mm and EF-S 17-85mm zoom lenses. The built-in flash has a guide number of 13/43 (ISO 100, meters/feet), the highest in its class as of February, 2005. The XT supports the new functions of Speedlite 580EX, including auto zoom for picture size and color temperature data transmission. Flash exposure bracketing, FEB, is now effective when set with the 580EX, 550EX, MR-14EX or MT-24EX Speedlites. Modeling flash is enabled with the 580EX, 550EX, 420EX, MR-14EX and MT-24EX Speedlites. In the Creative Zone modes, press the depth-of-field preview to fire at 70 Hz for 1 second. The EOS Digital Rebel XT camera supports wireless flash with the 5 flashes listed above and the ST-E2. Three-group slave control, a flash output ratio control, FEB and modeling flash (with flash output ratio) are all enabled. (The ST-E2 supports up to two slave groups with flash output ratio control, but not FEB or modeling flash.) Note that the 420EX can function as a slave only, while the MR-14EX and the MT-24EX can serve as the master unit only.

White Balance

The EOS Digital Rebel XT camera has six preset white balance modes: daylight (approx. 5200 K), shade (approx. 7000 K), cloudy (approx. 6000 K), tungsten (approx. 3200 K), fluorescent (approx. 4000 K) and flash (approx. 6000 K). In addition, it has an auto mode (AWB) and a custom mode. The auto white balance mode has been improved from that of the EOS Digital Rebel camera to make color reproduction more accurate and natural. Moreover, with DIGIC II and an improved algorithm, the white balance is now more stable. Also, color reproduction, especially of natural reds under low color temperature, such as tungsten light, has been improved, as has skin tone reproduction.

Monochrome

Monochrome (R Filter)
Custom Functions The EOS Digital Rebel XT camera adds nine of the EOS 20Ds eighteen custom functions to its arsenal of controls. C. Fn. 1 changes the functions of the SET button and the cross keys and provides for quick and easy access to frequently used functions. The five choices are: 0, Normal; 1, SET button controls image recording quality; 2, SET controls processing parameters; 3, SET controls image playback; 4, cross keys control AF point selection. C. Fn. 2 enables the dark noise subtraction noise reduction function for long exposures. It provides clearer images of night scenes or the night sky but doubles image processing time between exposures. C. Fn. 3 sets the flash sync speed in aperture priority auto mode to a fixed 1/200 second or leaves the sync speed on auto/slow sync. C. Fn. 4 determines selectable functions for the shutter and AE lock buttons. The four choices are: 0, AF/AE lock; 1, AE lock/AF; 2, AF/AF lock, no AE lock and 3, AE/AF, no AE lock.
C. Fn. 5 controls the AF-assist beam. The three choices are ON, OFF and fire only the external flash. C. Fn. 6 controls whether manually-adjusted exposure level increments are in 1/2 or 1/3 stop units. C. Fn. 7 enables the mirror lockup function. When C. Fn. 7-1 i selected, the mirror locks up when the shutter button is pressed completely. The shot is taken when the shutter button is released and then pressed completely again. The maximum mirror lockup duration is 30 seconds, after which the mirror returns. C. Fn. 8 controls whether the E-TTL II autoflash system operates in its evaluative mode or its averaging mode. Finally, C. Fn. 9 determines whether the built-in flash or an accessory Canon EX-series Speedlite is synchronized to fire after the first shutter curtain completes its travel or just before the second shutter curtain begins to move. Menus The Digital Rebel XT camera has ten new menu items compared to the EOS Digital Rebel camera, so a fifth menu column has been added to accommodate this new abundance of choices. Menus one and two are for image recording functions and are color-coded red. In menu one, the user chooses recording quality, red-eye reduction, warning beep, AF mode, metering mode and ISO speed. In the Creative Zone modes, menu two is displayed. It contains auto exposure bracketing, flash exposure compensation, white balance, white balance shift/bracket, custom white balance, color space and parameters. Menu three is color-coded blue and has 5 playback items: image protect, image rotate, print order, auto play and review time control. Menus four and five are for camera setup functions. They are colorcoded yellow, with 7 items in each. Setup one has auto power off timecontrol, auto rotate, LCD brightness setting in 5 levels, date/time, file numbering, format and shoot without card. Setup two has a choice of 15 different menu languages, a choice of video systems for playback through a connected TV monitor, data communication preferences (Normal or PTP), custom functions, a clear settings command, a sensor cleaning setting tha locks up the mirror and opens the shutter, and a firmware version readout. For quicker access to key camera settings, the EOS Digital Rebel XT also features a new "Quick Menu" function. When the camera is set for picture taking, the cross keys on the back provide instant access to AF mode, metering mode, white balance settings, and ISO speed. All in all, the menu settings enable Digital Rebel XT users to modify the cameras performance according to their diverse applications and needs.

Image Display In playback mode, a timely revision of the Jump function enables the user to move quickly to a particular image or group of images, no matter how far one needs to go. Carried forward is the ability to jump 10 frames. New are both the ability to jump 100 frames and the ability to jump to the first image of another days shooting. With the jump screen, use the top and bottom cross keys to select the jump method, and then use the left and right keys to jump. Because the Digital Rebel XT camera can take advantage of CompactFlash cards larger than 2 GB, the new Jump function promises to be a real time-saver. The XT has three different image display formats and controls to determine when or whether such displays should occur. In a sequence shared with the EOS 20D, each time the user presses the Info button during single image playback, the display mode will change as follows: single image with basic information, shooting information (the color space, WB correction and B/W indicator have been added) with reduced image size, and single image without information (another improvement over the EOS Digital Rebel camera). Press the left or right cross key to view the previous or the next image. In the nine image index format, pressing the Info button switches between normal (nine images plus basic information) and nine images without information. In the magnified zoom viewing format, pressing the Info button during image display switches between normal (magnified image with basic information) and magnified image without information.
1. Single Image (with basic information) 2. Shooting Information 2. Shooting information 1. Single image (with basic information)
3. Single Image (no shooting Information) 3. Single image (no shooting information)

Camera Camera Settings

settings
Image review time right after capture is menu settable to off, 2 seconds, 4 seconds, 8 seconds, or Hold. Pressing the Info button during image review switches the Info display on or off. Further choices are Auto play and Auto play right after shooting. Displayed images can be rotated manually or automatically. Manually, the Playback menu Rotate option enables clockwise rotation of 90, 270 and 0. Auto image rotation is settable with the Setup 1 menu's second item. Image rotation is applied during playback and video OUT, not during image review after image capture. The EOS Digital Rebel XT cameras LCD monitor has received some attention as well. It is the same unit used on the EOS Digital Rebel camera except that a slight difference between the brightness of the image displayed and its actual brightness as viewed on a correctly adjusted personal computer has been resolved by changing the LCD monitors gamma curve. Setup menu 1, item 3, provides a gray scale to assist in selecting one of five levels of LCD brightness.

Exposure Controls The EOS Digital Rebel XT camera offers a broad and flexible range of exposure controls. In the Basic Zone modes, evaluative metering, linked to all 7 AF points, is automatically selected. In the Creative Zone modes, partial metering at the center (9% of the viewfinder) and centerweighted average metering are also available. Pressing the left cross key displays the Metering Mode menu.

Viewfinder

Eight exposure modes offer a total of 14 different options: Program AE (shiftable), Shutter-priority AE, Aperturepriority AE, Auto Depth-of-Field AE (A-DEP, non-shiftable), Full Auto (Program AE, non-shiftable), six Programmed Image Control modes (Portrait, Landscape, Close-Up, Sports, Night Portrait, Flash OFF), Manual exposure (including Bulb), and E-TTL II autoflash program (C. Fn. 8-0: Evaluative metering, C. Fn. 8-1: Averaged metering). The range of available ISOs is from 100 to 1600. In the Basic Zone modes, the ISO cannot be set manually, whereas in the Creative Zone modes, the ISO cannot be set automatically. Pressing the top cross key displays the ISO speed menu. Manual exposure compensation is enabled in each of the Creative Zones except Manual. Bracketing can extend to +/- 2 stops in 1/2 or 1/3 stop increments. Depending on the shooting mode, either shutter speed, aperture, or both can be varied. Auto exposure bracketing, AEB, is available in the Creative Zone modes and is set with the on-screen menu. The bracketing sequence is, first, the standard exposure, then decreased exposure and, last, increased exposure. The range is the same as with manual bracketing. Conveniently, auto exposure bracketing can be used in combination with white balance bracketing, in which case nine images are generated. Both auto and manual AE lock are available in Creative Zone AE modes. In the One-Shot AF mode with evaluative metering, AE lock takes effect when focus is achieved. During evaluative metering, AE lock centers on the selected AF point. During partial metering at the center, or with centerweighted averaged metering, AE lock fixes on the center AF point. Normally, manual AE lock is enabled with the AE lock button. Pressing the button again renews the AE lock in the event of subject or camera movement. When the built-in flash or an EX-series Speedlite is used, the AE lock button works as an FE lock button.

Power Management

The EOS Digital Rebel XT camera is powered by the NB-2LH lithium-ion rechargeable battery pack. This battery is much smaller and lighter than the BP-511 used in the EOS Digital Rebel camera and is a key to the approximately 25% reduction in volume of the new camera relative to its predecessor. The NB-2LH has only 65% of the capacity of a BP-511 (720 mAh vs. 1100 mAh), but the new camera is 35% more energy efficient, primarily because of the DIGIC II image processor. As a result, the XT can take the same number of shots on a single NB-2LH battery pack as the original EOS Digital Rebel camera with a BP-511. With a fully charged NB-2LH at 20 C/68 F, the XT can take approximately 600 shots without flash, or approximately 400 shots with 50% flash use. It is possible to double the shooting capacity of the EOS Digital Rebel XT camera by using the new BG-E3 accessory battery grip that can hold one or two NB-2LH battery packs in battery magazine BGM-E3L. If two batteries are loaded, power is initially drawn from the one having the higher voltage. When the voltage level of the two batteries reaches the same level, power is drawn from both packs. When battery magazine BGM-E3A is used, the BG-E3 can hold six size AA batteries. They can be alkaline, lithium or Ni-MH. As with the EOS 20D with the BG-E2, the use of AA batteries should be considered only as a last resort. The NB-2LH is used in several Canon PowerShot S-series cameras, as well as a variety of Canon Mini-DV camcorders, so it is a standard stock item at many Canon dealers.
As with the BP-511A, the battery cover of the NB-2LH has a little hole whose orientation can be used to remind one whether the battery has been recharged or not. That recharging takes about 90 minutes in the supplied CB-2LT battery charger. Available as an accessory, the AC Adapter Kit ACK700 allows the XT to run on external power.

Recording System

The DIGIC II image processor in the EOS Digital Rebel XT camera brings with it several major improvements over the original DIGIC in the EOS Digital Rebel camera. It uses a newly developed algorithm that gives much faster data signal processing while consuming much less power. Color reproduction of high-saturation, bright subjects is improved, as is auto white balance precision, and there is a wider dynamic range in highlight areas.
There are six JPEG quality options, as well as.CR2 RAW only (the new RAW image type featured in Canon digital cameras from the EOS-1D Mark II onward) and a RAW+ JPEG setting in which a RAW file and a Large/Fine JPEG are recorded simultaneously and saved as separate images on the CompactFlash card. The XT is compatible with Type I and Type II CF cards up to 2 GB or larger capacity. Recording complies with Design rule for Camera File System 2.0 (revised to support Adobe RGB) and Exif 2.21. The DIGIC II and an improved card-writing process enable the data writing speed of the XT to be approximately 3.5 times faster than the EOS Digital Rebel camera. The DIGIC II, an improved system process sequence during startup, shorter startup processing, and a revamped CF card access method contribute to the XTs startup time of 0.2 seconds, as opposed to the 2.8 second startup time of the EOS Digital Rebel camera. A single image can be protected or unprotected, as set in the Playback menu, item 1. A single image or all images can be deleted from a CF card if they are unprotected. Formatting of the CF card is controlled through the Setup 1 menu, item 6.

Design and Construction

The EOS Digital Rebel camera is not a chunky camera by any means and no one has suggested that it was in need of a diet. By comparison, however, the EOS Digital Rebel XT camera is considerably smaller. From a distance, the XT is stylish and compact; in hand, it is delightful. Compared with its predecessor, the width of the XT is 15.5 mm smaller; the height is reduced by 4.8 mm and the thickness of the body is 8.4 mm less. The weight has been reduced by 2.5 ounces/70 grams The body alone weighs 17.1 ounces/490 grams With a battery, a CF card and the EF-S 18-55mm standard zoom lens, the camera weighs just 1.5 pounds/720 grams. The body consists of a chassis made of stainless steel, and a mirror box made of high-strength engineering plastic. The mirror box, to which the lens mount and image sensor are attached, is fixed very securely to the chassis to obtain the same body strength as the EOS 20D. This helps prevent the flange focal distance from changing due to the static pressure of the attached lens.
As with the EOS Digital Rebel model, the EOS Digital Rebel XT cameras top, front and rear covers are made of special engineering plastic known for light weight, excellent strength and electromagnetic shielding: ABS resin, polycarbonate resin, and polycarbonate mixed with special conductive fibers. The exterior finish is more refined than the EOS Digital Rebel cameras. The Canon logo is now embossed and colored to give the XT a high-quality appearance. Both titanium silver and satin black body colors will be offered.
As with all Canon DSLRs, regardless of price, value is a major part of the design process. The EOS Digital Rebel XT camera is made smaller, lighter and more affordable thanks to the following: The new, compact shutter, designed especially for the XT, is optimized for the APS-C sensor size. In turn, the viewfinder optics, consisting of the mirror box, mirror, focusing screen and so forth,were also downsized and the optical axis was lowered. The compact motor was positioned horizontally thanks to an optimized driving mechanism for the mirror, shutter and built-in flash. There are fewer large parts because the chassis is fitted with more functions. There are fewer connected components because the circuit boards are more highly integrated. New components include the DIGIC II, the timing generator, low pass filter and motor driver. There is a new, streamlined sensor manufacturing process and a smaller, thinner sensor package. The new NB-2LH lithium-ion battery pack is both smaller and lighter than the BP-511. Electrical parts in common with the PowerShot family of cameras have been incorporated. The shutter release mechanism is the same unit used on the EOS Elan 7E. It provides a shorter time lag (100 milliseconds instead of 120 milliseconds) than the EOS Digital Rebel camera. The XTs circuit board configuration consists of five hard boards centering on the External Interface Flash Circuit Board digital control circuit board, camera control circuit board, and the DC/DC converter cirConnection Motor Drive Board Circuit Board cuit board. Through various connectors, these boards are linked to 14 flexible circuit boards. The EOS Digital Rebel camera had the digital control circuit board and camera control circuit board on one large hard board. To reduce the XTs size further, the main board now includes the DC/DC power supply converter circuit.

III. DISCUSSION 23

a printer compatible with direct printing, select playback and choose the image to be printed; confirm the print setting and press the Direct Print button while its blue LED is lit.

Software

The software bundled with EOS Digital cameras in 2004 was composed of products centered on the EOS Viewer Utility. With the EOS Digital Rebel XT camera, the role of EVU will be taken over by a new software configuration centered on the ZoomBrowser EX / ImageBrowser applications supplied with the camera. Canon will also supply Digital Photo Professional software with the XT for professional and high-end amateur photographers who prefer to use RAW images. The EOS Digital Rebel XT camera will be supplied with three CDs, all Windows/Mac hybrids, the EOS Digital Solution Disk, v. 10, the Digital Photo Professional v. 1.6 CD and the Software Instruction Manual CD. The following can be found on the EOS Digital Solution Disk: ZoomBrowser EX v. 5.1 (Windows)/ImageBrowser v. 5.1 (Mac) is the main viewing/ editing software for the XT. Its task button and wizard-type interface is aimed primarily at a range of users from novices who shoot mostly JPEGs to advanced amateurs. It facilitates functions such as image downloading, specifying camera settings, remote shooting, image printing, multiple image viewing modes, RAW image processing for virtually all EOS Digital cameras, and image merging by starting or linking to the respective applications from ZoomBrowser EX/ImageBrowser. CameraWindow, v. 5.1 (Windows/Mac), controls communication between the camera and the computer. At default settings established when the software is installed, the Camera Window is automatically displayed when the camera is connected to the computer and allows the user to transfer images saved on a memory card in the camera to ZoomBrowser EX or ImageBrowser and to specify settings on the camera. PhotoRecord v. 2.2 (Windows) also uses a task button and wizard-type interface. It links to ZoomBrowser EX to provide advanced yet easy-to-use image layout, image size adjustment, frame selection, text caption entry and other printing functions. RAW Image Task v. 2.0 (Windows/Mac) works within ZoomBrowser EX and ImageBrowser. It allows users to display and process RAW images and to restore the processing parameters used on the camera. Its algorithms are well matched to Canon cameras, providing image processing with the same color tones as the camera itself. It also features functions for converting and saving RAW images as TIFF or JPEG and for adding ICC profiles. It is compatible with color management systems.
EOS Capture v. 1.3 (Windows/Mac) is a remote shooting software application. It allows the camera to be controlled and camera settings to be specified from the computer and saves shot images to the computer. It also allows the user to take shots by pressing the shutter button. It is identical to version 1.2 apart from the addition of the EOS Digital Rebel XT camera to the list of supported cameras. PhotoStitch v. 3.1 (Windows/Mac) uses a simple procedure to merge multiple JPEG images to create composite images such as panorama shots. ArcSoft PhotoStudio v. 5.5 (Windows/Mac) is also supplied on EOS Digital Solution Disk v. 10. It provides powerful image editing capabilities with a sophisticated yet easy-touse interface. Also included are WIA drivers for Windows XP and Me and TWAIN drivers for Windows 2000 and 98SE. Digital Photo Professional v. 1.6 (Windows/Mac) is supplied on a separate CD. DPP 1.6 is a powerful RAW workflow and image editing application program aimed primarily at professional and high-end amateur photographers who shoot RAW images. It uses Canons own algorithms to provide fast RAW image display and processing and offers a range of real time image adjustment functions.

IV. CONCLUSION

When the original EOS Digital Rebel camera was introduced, it was the first interchangeable-lens digital SLR to break the $1,000 price barrier. The approximate retail price was $899* for the body and $999* for the kit with the EF-S 18-55 mm lens. It had 6.3 megapixels, superb, low-noise images, long battery life, and it looked cool. There was nothing even remotely like it. No wonder Canon sold them by the ton and defined the under-$1,000 DSLR category in the process. The EOS Digital Rebel camera will remain in the Canon lineup at a reduced price. It will, undoubtedly, win new converts and create a whole new category once again. (* Actual selling prices are set by dealers and may vary.) Now the EOS Digital Rebel XT camera arrives. It is smaller and lighter, svelte, actually. It has even higher resolution and image quality, and a complete set of user controls. Combined with its extra-fast startup time, quick shutter release, short finder blackout time and excellent burst performance, Canon is defining the under-$1,000 DSLR category once again. Canon has discovered the power of a unique selling proposition: Make products that exceed the performance and value of everything else in their categories. That was the case with the original EOS Digital Rebel camera. It was certainly the case with the EOS1D Mark II, EOS-1Ds Mark II and EOS 20D cameras. It will surely be the case once again with the EOS Digital Rebel XT camera.

WHITE PAPER

THE CANON EOS DIGITAL REBEL XTi CAMERA: MORE REGAL THAN REBEL: THE FINEST PERFORMANCE AND THE BEST VALUE IN THE UNDER $1000 CATEGORY

Table of Contents

I OVERVIEW II NEW AND IMPROVED FEATURES III FEATURE DISCUSSION Newly Developed 10.1 MP Sensor Comprehensive Dust Reduction System New 9-point AF System New 2.5-in. TFT LCD Screen Display-off Sensor New User Interface Basic Operation Concept New Info Display Items Viewfinder SET Button, Cross-Keys, DISP. Improvements to Playback Menus Picture Style Custom Functions Camera Direct Printing Direct Image Transfer Design and Construction Interface Drive and Power Source Folders Accessories and System Compatibility Software IV SPECIFICATIONS V CONCLUSION
Contents 2006 by Canon U.S.A., Inc. All Rights Reserved. Excerpts from this material may be quoted in published product reviews and articles. For further information, please contact Canon U.S.A., Inc. Public Relations Dept., (516) 328-5000.

I. OVERVIEW

The Canon EOS Digital Rebel XTi is the best entry-level digital single lens reflex (DSLR) camera on the market today. Compared with its competitors at the sub-$1000 price point, lens included, the XTi produces the finest images with the purest colors and the lowest noise, and has the most comprehensive solution to the problem of dust on the sensor. It also has the clearest and most elegant user interface, the fastest and most precise autofocus, and the most powerful and useful software package. The original Canon EOS Digital Rebel, introduced in September, 2003, was the first interchangeable lens DSLR marketed for less than $1000 including a lens, the EF-S 18-55 mm zoom. Purchasers were delighted to find the camera small, light and easy to handle. Its image quality was remarkable thanks to its high-quality Canon CMOS sensor, producing lower noise levels than more expensive rival products offered. The original Digital Rebel enjoyed immense success in the marketplace, selling more than 1.2 million units worldwide in less than 18 months. In March, 2005, Canon introduced the second generation Digital Rebel XT with an 8.0 megapixel CMOS sensor vs. the 6.3 MP CMOS sensor of the Digital Rebel. The new camera was 3 ounces lighter and a half inch smaller than the original. A newly-developed DIGIC II image processor made the XT much faster, yet more frugal with battery power. E-TTL II flash control , nine Custom Functions, White Balance Bracketing, long-exposure noise reduction, a monochrome mode and a host of other changes gave XT users tremendous control over the photographic process. It was amazing that Canon could sell this camera for less than $1000, lens included. Once again, Canon had a wildly successful DSLR. The new Canon EOS Digital Rebel XTi builds on this inheritance. It uses a new, highly evolved 10.1 megapixel CMOS sensor that is designed and manufactured entirely by Canon using equipment which was also designed and manufactured by Canon. In this and many other respects, Canon is unique in the world of photography. Canons world-leading R&D division (second or third globally each year for 14 consecutive years in the number of U.S. patents granted) sees to it that every Canon DSLR has the highest image quality and the lowest noise in its category.
Canon designs, develops and manufactures its own EF lenses, its own CMOS image sensors, and its own DIGIC image processors, with proprietary technologies that it doesnt sell to anyone else. Canons original EOS Integrated Cleaning System gives the Digital Rebel XTi a comprehensive dust cleaning and management system offered by no other camera at any price. The Digital Rebel XTi has a 9-point, high-precision autofocus unit that it shares with the EOS 30D. The central sensor of the AF unit enhances precision with f/2.8 or faster lenses, a professional feature exclusive to the XTi in its category. The XTi has a new, large, bright, sharp, easy to read 2.5-inch color display and a new user interface that make the camera a delight to use. Picture Style, an improved Direct Print function, Print/Share, and a host of other improvements make the Digital Rebel XTi the highest performing member yet of the Digital Rebel family. The XTi builds on the successes of its predecessors, each of which was a superstar in its own right. With the Digital Rebel XTi, Canon goes from strength to strength, adding and refining features to make the XTi the finest camera today in the under-$1000 category.

sensor

The infrared-blocking, optical low-pass filter is an integral part of the sensor package, and is divided into two individual components for the first time. Low-pass filter #1 is part of the Self Cleaning Sensor Unit. Its front surface is coated with a dichroic mirror that reflects infrared wavelengths. LPF #1 also separates the subject image into two
4. Low-pass filter 2 (Separates image in vertical direction) 2. Phaser layer (Converts linear polarized light into circular polarized light) 1. Low-pass filter 1 (Separates image in horizontal direction)
images horizontally. The phase plate, or phaser layer, converts the images separated by LPF #1 from linear polarization to circular polarization and prepares these polarized components to be correctly separated into four square images by low-pass filter #2. The hybrid infrared-absorption glass reflects and absorbs infrared light, effectively suppressing red ghosting and color casts caused by reflections on the sensor surface. The subject image divided into two images horizontally by the low-pass filter is separated vertically into two images by low-pass filter #2. The image is thereby properly separated into four square images. The image separation width for the vertical and horizontal images is optimized for the sensor pitch, minimizing color artifacts and moire caused by minute horizontal- and vertical-line patterns. As in the case of the Canon EOS 5D, low-pass filter #2 also serves as the CMOS sensor package's cover glass, eliminating a relatively expensive glass cover and reducing cost.
Extraordinary New Dust Reduction System
Most modern camera stores now have a department devoted to dust removal tools: brushes sized to match sensors, electronic brushes, brushes that spin, solutions- in liquid and tablet form- for cleaning brushes, swabs of many types, wipes, grabbers, sticks, sleeves, liquids (ethanol, methanol and mysterious agents), rubber bulbs both large and small, chamber cleaning swabs and solutions, and, of course, more. The reason for this profusion is that digital SLRs with interchangeable lenses are susceptible to dust particles entering the camera when the lens is changed. The dust can settle on the sensor and leave a spotty mess on photographs, especially in less variegated areas like skies and clouds. The dust needs to be removed periodically, but touching a sensor is regarded (properly) by most people, no matter how skilled or prepared, as something to be avoided until or unless it is absolutely unavoidable. In the Digital Rebel XTi, Canon offers an astute new approach to the dust problem: a self-cleaning sensor unit and Dust Delete Data software. Traditional manual sensor cleaning remains an option, of necessity, but it now needs to done much, much less often, if at all, depending on shooting conditions and photographers habits. The overall strategy is one of, first, neither generating nor attracting dust. The shutter unit (the same as in the Digital Rebel XT) generates minimal dust; the body cap (incorporated since the first half of 2005) is now made of a material which minimizes dust caused by normal wear and rubbing, and the low-pass filter is treated with an anti-static charge process to prevent static-charged dust from adhering to it. In the course of developing this unit, Canon engineers analyzed the causes, types and sizes of visible dust. The dust becomes most noticeable at small apertures, so they studied what sizes of dust were the worst offenders at small apertures. The Self Cleaning Sensor Unit was then designed to eliminate those types of dust most effectively. Lowpass filter #1 on the front of the sensor is attached to an ultrasonic vibrating unit driven by a piezoelectric element. When LPF #1 is subjected to ultrasonic vibrations, the adhering dust is shaken off the surface.

Self-cleaning sensor system operates.

Picture is taken.

Steps to obtain dust delete data
To obtain Dust Delete Data, begin by taking a picture of a solid white, patternless object (such as a piece of white paper) which is quite out of focus despite the use of a small aperture. Use a 50mm or longer lens with manual focus set to infinity. The object should be about 1 foot from the camera. Any common light source is fine. Fill the viewfinder frame. (The image data can be obtained even without a CF card installed in the camera.) When the screen in step 4 appears, the camera will be set automatically as follows: shooting mode, aperture-priority AE; aperture, f/22; shutter speed, 1/2 sec. or faster; ISO Speed, 800***; flash, off; drive mode, single. Even if the focus mode is set to <AF>, manual focus will still take effect, and even if a CF card is installed in the camera, the image taken for the dust deletion will not be recorded. If the picture was overexposed or underexposed by 2 stops or more or if the lighting of the white paper was very uneven, the Dust Delete Data cannot be obtained properly and a message telling you to try again will appear on the screen. The Dust Delete Data obtained is subjoined to both the JPEG and RAW images regardless of the shooting mode. The data is only a few kilobytes, so it will not affect the continuous shooting speed or maximum burst. It is attached to all subsequent images until it is updated again (via the procedure described here). It is recommended that the Dust Delete Data be updated before a big shoot or after changing lenses in a dusty place.
If you use the Dust Delete Data feature and do not want to change the data of the dust coordinates, you can disable the default self-cleaning operation so it does not operate when the power is turned on or off. If you want to stop the Dust Delete Data from being appended to the images, the Dust Delete Data must be erased with the [Clear all camera settings] menu item. DPP Ver. 2.1 had the copy stamp tool for manually selecting and erasing round dust spots. This feature has been improved with the DPP Ver. 2.2 which can use the Dust Delete Data to erase the dust spots automatically. When an image contains Dust Delete Data, the automatic dust spot erasing process activates by starting the copy stamp tool and pressing the [Apply Dust Delete Data] button. With DPP Ver. 2.2, the dust spots at the locations specified by the Dust Delete Data are detected and erased if doing so is deemed effective. This modest bit of artificial intelligence will be appreciated by anyone who has done a little spotting or retouching because certain things (and its often difficult to figure out just which ones) look worse after theyve been repaired and are better off left alone.

Digital Photo Professional Ver 2.2
New High-Precision 9-Point AF System
The Digital Rebel XTi has the same 9-point AF sensor and AF unit as the EOS 30D, including the sophisticated dualprecision cross-type sensor in the center AF position. This represents a very substantial upgrade from the Digital Rebel XT. The XTi is the first entry-level EOS Digital camera to have an enhanced precision cross-type, center AF point compatible with f/2.8, a feature unique in its class. The XTi has some significant AF performance improvements over the Digital Rebel XT. For example, the XTi has the same wide-area focusing as the EOS 30D. With an f/2.8 or brighter lens, the center AF point detects focus with the f/2.8 light flux. The base line of the center AF point's vertical-line sensitive sensor is twice as long as that of an AF point compatible with f/5.6. This makes focusing detection more precise.

1.7 3.6 6.0

Additionally, the center AF point has a vertical-line sensitive sensor compatible with f/5.6. Therefore, cross-type focusing is possible with any EF lens. The center AF point's horizontal-line sensitive sensor for f/5.6 has a two-line, zigzag pattern. This redundancy of focusing methods makes focus detection more consistent. As in the case of the EOS 30D, fine-tuning has been incorporated to improve the AF precision. Focusing performance under low light has been improved by 1 stop and is now possible from EV -0.5 to
EV 18. Finally, the wider focusing area with nine AF points and the diagonal configuration of AF points in and around the center afford improved subject focus tracking. Focusing speed is on a par with that of the EOS 30D because the Digital Rebel XTi shares its high-speed 32-bit RISC microcomputer. The algorithm for AI SERVO AF continuous shooting has been fine-tuned and optimized for 3 frames per second. In the Creative Zone modes, the following AF modes can be selected with the AF mode selection screen: One-Shot AF (when focus is achieved, AF operation stops and locks), Predictive AI SERVO AF (tracks subject movement and focuses continuously until the start of exposure) and AI Focus AF (automatic switching between One-Shot and Predictive AI Servo AF). In the Basic Zone modes, the optimum AF mode is selected automatically, a convenience for the less technically inclined, certainly a part of the XTis demographic. In the Sports, Flash Off, and Basic Zone's Full Auto modes, the beeper sounds softly (when the beeper is enabled) when focus is achieved with AI SERVO AF. In the Creative Zone modes with AI SERVO AF, the beeper does not sound when focus is achieved. The AF mode can be set even while the lens focus mode switch is set to MF. (When focus is achieved, the focus confirmation icon and superimposed display lights up.) However, "MF" will be displayed on the LCD screen when it displays the camera settings The predictive AF calculation speed is the same as that of the Digital Rebel XT. With an EF300mm f/2.8L IS USM lens, the camera can focus-track a moving subject approaching at 31 mph/50 kph up to about 32.8 feet/10 meters away. As with the EOS 30D, the lens drive keeps still when focusing a still subject with AI SERVO AF. If the subject begins to move, the camera can start to focus-track the subject immediately because focus detection is conducted continuously. As in the case of the EOS 30D, if you press the shutter button completely in one quick stroke (rather than pressing halfway first), the lens will focus, if possible, before the picture is taken. If focusing is not possible, the picture will be taken anyway to give priority to taking the picture. This extreme instance of shooting priority is especially useful should something occur that is so remarkable that even less than perfect focus will not spoil the record of the moment. Because the Digital Rebel XTi uses the same AF point selection algorithm as the EOS 30D, there is a high probability that the correct AF point will be selected automatically. The selection procedure is the same as with the Digital Rebel XT. With the Digital Rebel XTi, you can select the AF point manually on the LCD screen's large and easyto-read display. As with the Digital Rebel XT, the XTis AF-assist beam is a series of stroboscopic flashes. It is not emitted in the Landscape, Sports or Flash OFF modes. In a Creative Zone mode, it fires automatically when the built-in flash has been popped up manually. Firing can be enabled/disabled with C.Fn-5. Emission time is 250 ms or less. The working range is approximately 13.1 feet/4 meters at the center and approximately 11.5 feet/3.5

meters at the other 8 AF points. When an external EOS Speedlite is used, the AF-assist beam of the external unit is used.
Speedlite 580EX 550EX 430EX 420EX 380EX 220EX ST-E2 AutomaticSelection Yes Yes Yes Yes Yes* Yes* Yes Manual Selection Center Yes Yes Yes Yes Yes Yes Yes Top/Bottom Yes Yes Yes Left/Right Yes Yes Yes Yes Yes Mid-left/Mid-right Yes Yes Yes Yes Yes
* Focus can be achieved only with the center AF point.
Some of Canons competitors have chosen to use in-body image stabilization. The technique involves moving the image sensor in a controlled fashion, based on signals from movement detecting sensors in the camera body. The obvious advantage of this system is that users have some sort of stabilization available with almost any lens they connect to the body. Short focal length lenses require smaller sensor deflections; 24 or 28 mm lenses might need only 1 mm or so. Longer lenses necessitate much greater movement; 300 mm lenses would have to move the sensor about 5.5 mm (nearly 1/4) to achieve the correction Canon gets with its IS system at the same focal length. This degree of sensor movement is beyond the range of current technology. Short and normal focal length lenses need stabilization much less often than long lenses, so the lenses that need the most help get the least. Further, in cameras with smaller than full-frame, 35 mm film size sensors, equivalent focal lengths become longer, by a factor of 1.5 or 1.6, exacerbating the problem by making all lenses longer. Less significant but still worth mentioning is the fact that in-body stabilization is not visible through the finder, whereas Canon lens-based stabilzation definitely is. Also, while in-body stabilization works for many lenses, it does not presently work for all; high magnifications and macro lenses have caused it difficulties. In the Canon IS system, the Image Stabilizer has an actual lens group that can be moved up and down, or side-toside, in parallel to the imaging sensor or film plane. A pair of sensors in the lens can detect horizontal or vertical shake. Signals from these sensors are sent instantly to a microprocessor in the lens and analyzed. The microprocessor then causes a group of lens elements, held in place by a device called a coil, to move at the same amplitude and frequency of the shake to cancel it effectively.

1: No camera shake

Group 1 (focusing group) Group 2 (image-stabilizing group)
To Object Group 3 to 6 Focal plane
2: Lens front shakes downward
3: Image-stabilizing group counteracting downward camera shake
Direction of Group 2 movement

Camera setting

Image playback
New info display items The large LCD screen has enabled 8 new items to be added to the info display compared with the Digital Rebel XT: ISO speed, Dimmer offset, AF frame display, White balance adjustment, White balance bracketing, Beep, Red-eye reduction mode, and Shooting display mode.

Camera side in effect

External flash side in effect
The least obvious of these, and perhaps the most clever, is Dimmer offset. One line down from the top on the far right hand side of the display, either of two icons may appear. The first is a standard lightning bolt with +/- after it. When this symbol, and a number such as 2/3 appears, the display indicates that the built-in flash is set for an exposure reduction of 2/3 stop. The other icon is a picture of a Speedlite, followed by the same +/-. If that symbol is displayed, followed by, say, + 1 1/3, the display is indicating that the external flash attached to the Digital Rebel XTi is set for an increase in exposure of 1 1/3 stops. When exposure correction is applied, the exposure correction display in the center of the second row on the LCD screen changes color for easy reference. The screen also displays error and warning messages and their solutions. A change to the info display is that the battery power remaining indicator now has 4 levels, rather than 3. The EOS 30D also offers this useful feature.

Battery almost dead

Full power

Low power

Viewfinder The viewfinder has two additions, both brought from the EOS 30D: an FE lock indicator on the left side, and white balance adjustment, +/-, on the right. The red-eye reduction mark is displayed on the LCD screen, so it is not included in the viewfinder. Viewfinder blackout time is approximately 170 ms at 1/60 second or faster shutter speeds. A dioptric adjustment range from -3.0 to +1.0 dpt. is possible and an excellent Precision Matte focusing screen is standard.

Viewfinder

The Digital Rebel XTi has a depth-of-field preview feature, a welcome surprise at the new cameras price point. The button is located near the lens mount, under the left thumb when the XTi is held horizontally. The feature is enabled in the Creative Zone modes. SET button, cross keys, DISP. The SET button is for selecting Picture Style directly. This is its default function. It promotes the use of Picture Styles, clearly differentiating the XTi from its rivals. Also, the Picture Style logo is imprinted below the SET buttonas a reminder of this capability. The

cross keys are assigned with functions to set the ISO speed, AF mode, white balance, and metering mode. The procedures to set the ISO speed, AF mode, white balance, and metering mode are the same as with the Canon EOS 30D. Settings take effect from the moment they are selected. You no longer need to press the SET button to register the setting. Although the default setting for the SET button gives direct access to Picture Style, C.Fn.01 can task the button with control of Quality (JPEG quality, RAW, or a combination of the two), Flash exposure compensation (when using external flash, its flash exposure compensation overrides the cameras), Playback (switch instantly to Playback mode) or Cross keys: AF frame selection (cross keys change AF point directly).
The name of the Info button has been changed to DISP. because it now turns the display on and off. Its location is meant to make it easy to turn off the display to save energy. Improvements to playback In four playback-related improvements, the Digital Rebel XTi can now display a magnified or reduced view during quick review (C.Fn.10-1, magnified view on image review and playback); automatic image rotation for images taken in vertical orientation may be selected; a highly useful RGB histogram display is now provided, and CF card remaining capacity has been added to the playback info screen. Menus As in the case of the Digital Rebel XT, the tabbed menu screens are operated with the cross keys and SET button. Menu operation is possible even during the image writing to the CF card after continuous shooting. Note that functions already assigned to cross keys (ISO speed, etc.) are not included in the menus. In all, there are 2 shooting menus, a playback menu and 2 set-up menus. The new items are Picture Style and Dust Delete Data added to Shooting 2, Transfer order added to Playback, LCD auto off added to Set-up 1, and Sensor cleaning: auto and Sensor cleaning: manual added to Set-up 2. Changed items are the Histogram in Playback (RGB added), Auto power off, Auto rotate, LCD brightness and File numbering in Set-up 1, and 2 Custom Functions added to Set-up 2. Any of the following 15 languages can be selected for the LCD screen language: English, German, French, Dutch, Danish, Finnish, Italian, Norwegian, Swedish, Spanish, Simplified Chinese, Japanese, Traditional Chinese, Korean and Russian.
Picture Style Picture Style, which Canon is implementing across its full EOS Digital range, is new to the sub-$1000 category. It can be selected directly with the SET button, or through Shooting menu 2. For the first 5 choices, Standard, Portrait, Landscape, Neutral and Faithful, the variables are sharpness, contrast, saturation and color tone. Each Style has preset values for these image characteristics that can be changed by the user in the menu. The process of selecting or refining a Picture Style can be likened to deciding on a film: something a little more saturated and sharper, or perhaps something less forward with a subtle palette and a less-scientific representation of skin textures. The sixth Picture Style is Monochrome, whose variables are Sharpness, Contrast, Filter effect and Toning effect. Last, there are 3 open slots for User Defined styles. Custom Functions The Digital Rebel XTi has 11 Custom Functions with 29 settings to choose from. Four functions were added or changed on the XTi relative to the XT: C.Fn 1: SET button functions (0: Picture Style, 1: Quality, 2: Flash exposure compensation adjustment, 3: Flash exp comp, 4: Cross keys: AF frame selec.), C.Fn 2: Long exposure noise reduction (Off/Auto/On), C.Fn 10: Magnified view (0: Image playback only, 1: Image review and playback), and C.Fn.11: LCD display when power ON (0: Display, 1: Retain power OFF status). Note that with C.Fn-7-1 (mirror lockup) set, one should not point the camera toward the sun or any bright light source. Doing so can damage the shutter curtains, cause stray light to enter, or damage the imaging sensor.

4. Select image and transfer-- Select images and transfer them to the PC. 5. Wallpaper for computer-- Select an image to use as the background (wallpaper) for the computer screen and transfer it to the PC. A JPEG file is automatically converted into a BMP file to be transferred and appears as the background (wallpaper) for the computer screen. RAW images cannot be transferred for this purpose.

Design and Construction

The Digital Rebel XTi is a compact, stylish and attractive DSLR that continues the design concept of its predecessor, the Digital Rebel XT. The exterior surface is now coated with a leathery paint finish to make fingernail scratches less noticeable. The Canon logo is a bit bigger to make it stand out better in retail situations (2 mm wider and 0.4 mm higher). To improve holding ease, a convenient new rubber slip guard for the thumb (back, top right) and a new grip shape in the back have been incorporated. The grip is also thicker by 1 mm. The texture of the mode dial has been changed. The Print/Share button is now on the upper left on the back of the camera where the digital control buttons are concentrated. Clearly separating the digital control buttons and camera control buttons makes the camera easier to operate. The new screen and the elimination of the bifurcated display give the back of the camera a cleaner and more integrated appearance. The camera body construction of the Digital Rebel XTi is very similar to that of the Digital Rebel XT, a camera of proven ruggedness and reliability. The stainless steel chassis and mirror box made of high-strength engineering plastic (polycarbonate with glass fiber) make the body as strong as the XTs. As with the XT, the camera's top, front, and rear covers are made of special engineering plastic (ABS resin, polycarbonate resin, and polycarbonate resin with special conductive fibers) for light weight, high strength, and electromagnetic shielding. The XTi will come in two color versions, silver and black. The basic internal components and configuration are the same as those of the Digital Rebel XT. The following units have been added or modified: Self Cleaning Sensor Unit (added), Display-off sensor unit (added), LCD screen (size increased from 1.8 in. to 2.5 in.), LCD panel (eliminated). Note that in every parts category (except lead wires, which remain unchanged at 12), the parts count on the Digital Rebel XTi has increased relative to its predecessor. The total is now 1508, compared to 1319 previously. This is a good, if somewhat generalized, indication that the Digital Rebel XTi is a more sophisticated, and more expensive to produce, camera than the Digital Rebel XT, and that it offers exceptional value in the sub-$1000 category.

Recording System

File Format: Design rule for Camera File System 2.0 and Exif 2.21 Recording Format: JPEG, RAW, and RAW+JPEG simultaneous recording provided. The RAW and JPEG images are saved as separate files in the CF card. Image Compression: JPEG, RAW (Canon.CR2) File Size: (1) Large/Fine: Approx. 3.8MB (3,888 x 2,592), (2) Large/Normal: Approx. 2.0MB (3,888 x 2,592), (3) Medium/Fine: Approx. 2.3MB (2,816 x 1,880), (4) Medium/Normal: Approx. 1.2MB (2,816 x 1,880), (5) Small/Fine: Approx. 1.3MB (1,936 x 1,288), (6) Small/Normal: Approx. 0.7MB (1,936 x 1,288), (7) RAW: Approx. 9.8MB (3,888 x 2,592) Folders: Automatic folder creation; up to 9,999 images per folder (new folder created when the file number reaches 9999) File Numbering: (1) Continuous numbering (2) Auto reset (3) Manual reset (the image numbering is reset to 0001, a new folder is created where subsequent images are saved) Color Space: Selectable between sRGB and Adobe RGB Picture Style: Six preset Picture Style settings plus three user-defined custom Picture Style settings with individual adjustments for Sharpness, Contrast, Color saturation, 2nd Color tone; Filter effect, Toning effect for black & white images Interface: USB 2.0 Hi-Speed, mini-B port. NTSC/PAL for video output

Whtie Balance

Settings: Auto, Preset (Daylight, Shade, Cloudy, Tungsten Light, White Fluorescent Light, Flash), Manual (Custom, or user-set Color Temperature) Auto White Balance: Auto white balance with the image sensor Color Temperature Compensation: White balance bracketing: +/- 3 stops in 1-stop increments; White balance correction: blue/amber bias +/- 9 levels, magenta/green bias +/- 9 levels. When blue/amber bias and magenta/green bias set with White balance correction, white balance bracketing cannot be set to more than +/- 9 levels
Type: Eye-level SLR with pentamirror Coverage: Approx. 95% horizontally and vertically Magnification: 0.8x (-1 dpt with 50mm lens at infinity) Eyepoint: Approx. 21mm Dioptric Adjustment Correction: -3.0 to +1.0 diopter Mirror: Quick-return half mirror (Transmission: reflection ratio of 40:60) Viewfinder Information: AF (AF points, focus confirmation light), Exposure (shutter speed, aperture, exposure level, AE lock, exposure compensation, AEB level, bulb), Flash (flash ready, red-eye reduction lamp on, high-speed sync, FE lock, FEB shooting, flash exposure compensation, insufficient flash warning during FE lock), White balance correction, Maximum burst, CF card full warning, CF card error warning, No CF card warning Depth-of-Field Preview: Enabled with depth-of-field preview button (with Speedlite 580EX, 430EX, MR-14EX or MT-24EX; pressing the depth-of-field preview button fires a modeling flash) Eyepiece Shutter: None (eyepiece cover provided on strap)

Autofocus

Type: TTL-CT-SIR with CMOS sensor AF points: 9 AF points AF Working Range: EV -0.518 (ISO 100 at 73F/23C) Focusing Modes: Autofocus: One-Shot AF, Predictive AI Servo AF, AI Focus AF (automatic switching between One-Shot/Predictive AI Servo AF); Manual Focus (MF) AF Point Selection: Automatic selection, Manual AF point selection Selected AF Point Display: Superimposed on viewfinder and LCD monitor AF-assist Beam: Intermittent firing of built-in flash (Emitted automatically when necessary under low light, and linked to all 9 AF points. Not emitted in the Landscape, Sports and Flash OFF modes)

Exposure Control

Metering Modes: Max. aperture TTL metering with 35-zone SPC, (1) Evaluative metering (linked to all AF points), (2) Partial metering (approx. 9% at center of viewfinder), (3) Center-weighted average metering Metering Range: EV 120 (ISO 100 at 73F/23C with EF 50mm f/1.4 USM lens) Exposure Control Systems: Program AE (shiftable), Shutter-priority AE, Aperture-priority AE, Auto Depth-of-field AE (non-shiftable), Full auto (Program AE, non-shiftable), Programmed image control modes, Manual exposure (including bulb), E-TTL II autoflash program AE ISO Speed Range: Basic Zone: automatically set by the camera; Creative Zone: equivalent to ISO 1001,600 Exposure Compensation: (1) User-set with multi-controller (2) AEB (Auto Exposure Bracketing); Bracketing range: +/- 2 stops in 1/3- or 1/2-stop increments AE Lock: Auto: Applied in One-Shot AF mode with evaluative metering when focus is achieved User-set: Applied with AE lock button

Shutter

Type: Vertical-travel, mechanical, focal-plane shutter with all speeds electronically controlled Shutter Speeds: 1/4000 to 30 sec. (1/3- and 1/2-stop increments), X-sync at 1/200 sec. Shutter Release: Soft-touch electromagnetic release; shutter lag time approx. 100 msec. Self-Timer: 10 sec. delay, 2 sec. delay with C.Fn-7-1 (mirror lockup) Remote Control: Remote control with Remote Switch RS-60E3 or Wireless Remote Controllers RC-1/RC-5.

Built-in Flash

Type: Auto pop-up, retractable, built-in flash in the pentaprism Guide Number: 43 ft./13m (ISO 100) Recycling Time: Approx. 3 sec. Flash-ready Indicator: Flash-ready indicator lights in viewfinder Flash Coverage: 17mm lens focal length (equivalent to 27mm in 135 format) Flash Metering System: E-TTL II autoflash Flash Exposure Compensation: +/-2 stops in 1/3- and 1/2-stop increments EOS External Flash or Dedicated Speedlite: E-TTL II autoflash with EX Series Speedlites

Drive System

Drive Modes: Single, Continuous, Self-timer/Remote control Continuous Shooting Speed: Approx. 3 fps (at a shutter speed of 1/250 sec. or faster) Max. Burst During Continuous Shooting: JPEG: approx. 27 frames (Large/Fine); RAW: approx. 10 frames; RAW+JPEG: approx. 8 frames (Large/Fine)

LCD Monitor

Type: TFT color, liquid-crystal monitor Monitor Size: 2.5 in. diagonal with a viewing angle of approx. 160 vertically and horizontally Pixels: Approx. 230,000 pixels Coverage: Approx. 100% Brightness Control: 7 levels provided

Playback

Image Display Format: Single image, 9-image index, Magnified zoom (approx. 1.5x to 10x), Auto play, Auto review right after shooting, Histogram, Rotate, Jump Highlight Alert: In the single image (INFO) display mode, the highlight portions containing no image information will blink

Image Protection And Erase
Protection: A single image can be protected or unprotected Erase: A single image or all images stored in a CF card can be erased if they are unprotected Direct Printing from the Camera: Enabled with the Print/Share button Compatible Printers: CP and SELPHY Compact Photo Printers, PIXMA Photo Printers and PictBridge compatible printers (via USB Interface Cable IFC-400PCU) Settings: Print quantity, style (image, paper size, borders, date), trimming
Menu Categories: Shooting menu: red, Playback menu: blue, Setup menu: yellow LCD Monitor Languages: 15 languages provided (English, German, French, Dutch, Danish, Finnish, Italian, Norwegian, Swedish, Spanish, Russian, Simplified Chinese, Traditional Chinese, Korean, Japanese) Firmware Update: Enabled by the user

Power Source

Battery: One Battery Pack NB-2LH
Number of Shots Configuration NB-2LHX1 Normal temp (73F/23C) Low temp (32F/0C) Normal temp (73F/23C) Low temp (32F/0C) No Flash Used 500 frames 370 frames 1000 frames 740 frames 50% with Flash 360 frames 280 frames 720 frames 560 frames

NB-2LHX2

Dimensions And Weight
Dimensions (W x H x D): 4.98 x 3.71 x 2.56 in./126.5 x 94.2 x 65mm Weight: 18 oz./510g (body only)

Operating Environment

Operating Temperature Range: 32104F/040C Operating Humidity Range: 85% or less
Canon and DIGIC are registered trademarks, and SELPHY and PIXMA are trademarks, of Canon Inc. in the United States and may also be registered trademarks or trademarks in other countries. IMAGEANYWARE is a trademark of Canon. Microsoft and Windows are trademarks or registered trademarks of the Microsoft Corporation in the United States and/or other countries. Mac is a trademark of Apple Computer, Inc., registered in the United States and other countries. Adobe Photoshop is a registered trademark of Adobe Systems incorporated and its subsidiaries in each country. All other products and brand names are registered trademarks, trademarks or service marks of their respective owners.

All the specifications above are based on Canon's Standard Test Method. The camera's specifications and physical appearance are subject to change without notice. TFT monitor images shown in this white paper are simulated. Microsoft and Windows are registered trademarks or trademarks of Microsoft Corporation in the United States and / or other countries, Macintosh is a registered trademark or trademark of Apple Computer Inc. in the United States and / or other countries. CompactFlash is a trademark of SanDisk Corporation. Microdrive is a trademark of IBM Corporation. Adobe Photoshop is a registered trademark of Adobe Systems Incorporated and its subsidiaries in each country. The other product and brand names appearing in this brochure are trademarks or registered trademarks of their respective owners. TFT monitor images shown in this brochure are simulated.

V. CONCLUSION

The Canon Digital Rebel XTi is a formidable camera on many levels. Its image quality is unequaled in its category and is good enough to be compared favorably with cameras costing up to twice as much. Its ease of use enables owners with any level of expertise to get superb results. Its comprehensive dust solution mitigates one of the true annoyances of DSLR ownership. Its compact body and refined ergonomics make it a pleasure to live with. The Digital Rebel XTi will certainly be a great success in the marketplace. As photographers become acquainted with the XTi, it is likely that advanced amateurs and professionals will find it as irresistible as beginners will. For journalists, wedding photographers and portraitists, it has the resolution, the image quality and the proven reliability to serve nobly. When its complete compatibility with the legendary Canon EOS system is taken into account, the Digital Rebel XTi will certainly be recognized by photographers everywhere as the finest value and most appealing sales proposition of any DSLR in its price class and well beyond.