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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.

Piezoelectric element

Vibration

Retaining component

The removed dust then sticks to an absorbent material ringing the low-pass filter. The sensor unit also has an internal O-ring around the perimeter to keep out dust. The area between LPF #1 and the CMOS sensor is thus sealed; dust cannot enter from the side.

Low-pass filter 1

Instead of a dust-removal system which uses a vibrating glass, the Digital Rebel XTi uses its low-pass filter to vibrate directly, shaking off dust. Therefore, the optical performance is not degraded by an extra sheet of glass, and compactness is maintained. The camera body size is virtually the same as that of the Digital Rebel XT.
Piezoelectric element O-ring
CMOS sensor Phaser layer Infrared-absorbing glass Low-pass filter 2 Support material
The default setting for the self-cleaning sensor has the cleaning unit operating for 1 sec. when the camera's power switch is turned on or off. Dust is therefore removed before shooting and after shooting is completed, the latter instance because dust is more difficult to dislodge after it has been stuck for a long time. Self-cleaning can be enabled or disabled by setting "Clean when the power switch is turned <ON> or <OFF>" to [Enable] or [Disable]. During self-cleaning operation, the LCD screen displays an appropriate self-cleaning system logo. The self-cleaning system can also be activated manually with the menu item [Clean now]. Note that shooting priority still holds. If you press the shutter button halfway or press the menu button during the self- cleaning operation (in either the Auto or Manual modes), the cleaning operation will stop and the camera will be ready to shoot. Pressing the shutter button during the internal processing startup sequence (immediately after the 0.2 second startup) will make shooting possible at that moment and sensor cleaning will not occur.
Startup 0.2 sec. Internal processing 0.5 to 2 seconds Sensor cleaning Approximately 1 second

Cleaning complete

Shooting is possible immediately after startup
During manual cleaning with the reflex mirror locked up, the LCD screen will indicate that sensor cleaning is in progress. When the battery level is low, the following warnings are given: First, the beeper will sound even if [Beep] is set to [Off]. Second, a warning message is displayed on the LCD screen until the prohibited voltage is reached. Because the self-cleaning system requires exceptionally low power, the number of possible shots from a charged battery is not reduced measurably. To prevent the piezoelectric element from overheating, the self-cleaning unit cannot operate for 3 sec. after any

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
How the Image Stabilizer works
Canon is able to generate excellent image quality by stabilizing the image optically before it ever reaches the imaging sensor in a digital SLR. With the optical IS used by Canon, each lens with IS has a stabilizer unit designed for that lens's needs. The unit in a lens such as the EF 28-135 f/3.5-5.6 IS USM or the EF-S 17-85 f/4-5.6 IS USM is vastly different from the powerful, broad movement stabilizers
in lenses such as the EF 400mm f/2.8L IS USM or the EF 600mm f/4L IS USM. All over the world, photographers depend on Canon IS to help them achieve the highest possible image quality. At some point, in-body stabilization may improve to the point at which such technology may be appropriate for certain segments of Canons DSLR range. It would be senseless to rule out such a possibility. Even now, differences in unit cost are not enough to be significant factors in such a decision. The bottom line is performance.
New, Highly-Legible 2.5-inch TFT LCD Color Screen
A 2.5-in., 230,000-pixel, color TFT LCD screen with a wide, 160 viewing angle is a welcome new feature of the Digital Rebel XTi. Compared to the Digital Rebel XT's 1.8-in. LCD screen, the display area is about twice as large. Also, to improve the

Horizontal viewing angle

Vertical viewing angle
Digital Rebel XTi Digital Rebel XT
menu's readability, the font size has been greatly increased. The LCD screen illumination is provided by three LED backlight modules and the brightness adjustment range has been expanded by one level at both the minimum and maximum levels to a total of 7 steps. During brightness adjustment, a handy and elegant grey scale is displayed along with the image. Thanks to a highly transparent LCD screen and a brilliant LED module, screen brightness is about 40% higher than the maximum brightness of the screens found on the EOS-1D Mark II N, EOS 5D, and 30D. This makes it easier to review images even in bright outdoor conditions. At the darkest setting, the display is not uncomfortably bright, even in a dark place. The maximum brightness setting changes the gamma characteristic of the display to increase the midtones, making the image look somewhat overexposed, and highlight detail tends to be lost. Therefore, it is important that when checking an image's exposure and colors, the brightness level be set to one of the middle five levels. Because the Digital Rebel XTi displays the camera settings at all times, users are recommended to set the screen brightness to a suitable level which would not be too bright in the dark.

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.

Camera Direct Printing

Several useful improvements have been added to the Direct Print feature on the Digital Rebel XTi: Contact sheet style 35 image index printing Printing with shooting information 20 image index printing with shooting information
20-image print with EXIF information

35-image contact sheet

Single image print with EXIF information
Red-eye reduction function Face brightening correction function Addition of supported paper sizes (4" x 8", 10" x 12", 8" x 10", 14" x 17") Improved printing effects (Natural, Natural M, B/W, Cool Tone, Warm Tone added) Adjustment of printing parameters Addition of supported paper (Fine Art Photo Rag, Super Photo paper) Many of these items appeared on the EOS 30D. Beginners and advanced photographers alike will find them useful and appealing.

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.

Item Optics Mechanical parts Electrical parts Circuit boards Lead wires Total (Official) Screws and washers Total

XTi 163 1508

XT 135 1319
The shutter unit is counted as 1 part. The E-ring is counted as a washer. The official total excludes the screws and washers.
The XTis 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 XTs electrical components, the XTis electrical components are compatible with several significant new features, such as the 10.10megapixel CMOS sensor, Self Cleaning Sensor Unit, Display-off sensor, and the 2.5in. LCD screen. As with the XT, the XTi's main circuit board is a highly-integrated 8layer 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

Flash Circuit Board
Self Sensor Cleaning Unit 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 communications 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 selftimer/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, Canondesigned 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

Accessories and System Compatibility
The Digital Rebel XTi shares its major accessories with the its predecessor, the Digital Rebel XT. The BG-E3 battery grip makes it easy to shoot vertically and has magazines for either two NB-2LH batteries or three AA batteries. The EH18-L semi-hard case and EW100DBII wide strap continue. Power accessories include the CB-2LW battery charger (for Japan and the Americas), the CB-2LWE charger (for Europe, Asia, South Korea and China), the ACK-DC20/ACK700 AC adapter kits and the CBC-NB2 car battery charger. With a few minor exceptions, the Digital Rebel XTi is fully compatible with the vast Canon EOS system of EF and EF-S lenses, Speedlites, switches, remotes, cables and adapters.
Interchangeable Lenses Lens Mount Converter FD-EOS Macro Lens Mount Converter FD-EOS Although it can be used with manual exposure, exposure error occurs. Therefore, these items will be officially listed as incompatible. Speedlites 480EZ 540EZ 430EZ 420EZ ML-3 300EZ 200E Wired multi-Speedlite accessories (since it cannot fire in Manual flash mode when used with TTL hot shoe adapter). Not compatible (since it only has autoflash modes, it cannot fire). Compatible with manual flash (does not fire in A-TTL/TTL autoflash modes). Not compatible
System accessories not listed above are completely compatible with Digital Rebel XTi.

Software

With the Digital Rebel XTi, Canon continues its tradition of including a complete package of useful and appropriate software at no additional cost with each of its DSLR cameras. The EOS Digital Solution Disk (Ver. 13.0) includes the upgraded Zoom Browser EX (Ver. 5.7, Windows)/Image Browser (Ver. 5.7, Mac), Digital Photo Professional (Ver. 2.2), EOS Utility (Ver. 1.1), Photostitch (Ver. 3.1), and the PTP TWAIN/WIA driver (Windows). The second CD contains information explaining the use of all the application software on the EOS SolutionDisk. The Digital Photo Professional RAW conversion and workflow application now supports Dust Delete Data, and its RGB tone curve adjustment function has been expanded to include an extended range of effectiveness and human face detection.
Windows Supported Operating System 98SE EOS Utility Digital Photo Professional ZoomBrowser CameraWindow MC RAW Image Task PhotoStitch ImageBrowser Me 2000 XP OS X 10.2 OS X 10.3 OS X 10.4 Macintosh

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

WHITE PAPER

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 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

Selectable AF modes: One-Shot, AI Servo or AI Focus Selectable metering patterns: 35-zone Evaluative, Centerweighted Average, and Partial (approx. 9% of viewfinder) Adjustable Flash Exposure Compensation up to +/- 2 stops Nine Custom Functions with 24 settings including mirror lock Three JPEG resolution options: Large, 8 megapixels; Medium, 4.1 megapixels; Small, 2 megapixels Cross keys can now be used to select the AF point directly via Custom Function 1-4 New Quick Menu function gives direct access to frequently used settings via cross keys Shutter speeds now user-settable in 1/3 or 1/2 stop increments Exposure compensation now possible in any auto exposure mode, up to +/- 2 stops, in 1/3 or 1/2 stop increments Fifteen menu interface languages Playback options accessed with the Info button include single image with or without basic info overlay, or with full shooting information Jump display now offers a choice of 10 or 100 images forward or back in single play mode, or jump by the shooting date New, brighter, Precision Matte focusing screen for greater contrast and snap with manual focusing

Flash Performance

E-TTL II improves accuracy and consistency of flash exposure E-TTL II is available with built-in flash and all EX-series Speedlites E-TTL II works with all Canon EF and EF-S lenses Distance information from compatible Canon EF lenses now used in flash exposure calculation Evaluative E-TTL II flash metering no longer linked to active AF point Average E-TTL II flash metering from all 35 zones now possible via Custom Function 8-1 Digital Rebel XT has built-in adjustment for flash exposure compensation, up to +/- 2 stops in 1/3 or 1/2 stop increments, and flash exposure bracketing with compatible Canon Speedlites Digital Rebel XT supports new functions of accessory 580EX Speedlite, including auto zoom adjustment for sensor size and color temperature data transmission

Built-in flash is 5.5 mm higher than EOS Digital Rebel camera, reducing red-eye and vignetting, and covers 17mm focal length Modeling flash for preview purposes, a 1 second continuous burst at 70 Hz, possible with compatible Canon flash units New second-curtain flash sync with Canon EX-series Speedlites and Custom Function 9-1 Wireless E-TTL II provides ratio control of up to three flash groups over a six stop range with select Canon EX-series Speedlites and ratio control of up to two flash groups with accessory Speedlite Transmitter ST-E2
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.

Microlens gap Dichroic Mirror (Reflects Infrared Rays) Infrared-absorbing Glass Null area
Photodiode EOS Digital Rebel XT EOS Digital Rebel/EOS 300D Digital CMOS Sensor
The new, 3-layer optical low-pass filter has the same construction as the EOS 20Ds filter, an infrared absorbing glass and three crystal plates having different optical axes. A dichroic mirror with a dielectric, multi-layer coating on the front surface deflects light over a wide range of infrared wavelengths. There is also an infrared-absorbing glass layer to absorb nearinfrared wavelengths in the visible spectrum. The low-pass filter incorporates two monocrystal plates that separate the subject image into four horizontal and vertical directions. Between these two plates is a phase plate, also monocrystal, which converts the linear polarized light into circular polarized light. The first crystalline plate separates the image into two images
Low-pass Filter (Separates image in vertical direction) Phase Layer (Converts linear polarized light into circular polarized light) Low-pass Filter (Separates image in horizontal direction)
Optical LPF Optical LPF Optical LPF (phase plate) Point light source

Imaging Element

III. DISCUSSION
horizontally. The linear polarized light is converted into circular polarized light by the phase plate. The second crystal plate separates the images vertically, resulting in four duplicate images arranged in a square matrix. The image separation in the horizontal and vertical directions is optimized for the sensor pitch so that false colors and moir caused by minute horizontal and vertical lines in the subject are reduced while resolution is actually increased. Additionally, this hybrid construction, with its deflecting and absorbing layers, reduces image fogging and red ghosting caused by sensor reflections. The CMOS sensor features a second generation, on-chip, noisereduction circuit that includes a new low-noise gain amp and an offset reduction circuit. The signal is amplified in slow-read steps. The result is the effective elimination of random noise and fixed pattern noise. With the EOS Digital Rebel XT camera, one can even photograph the heavens in the night sky with very low noise.
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.

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.
For a custom WB setting, first take a picture of a white subject serving as the white balance standard. Then, set the custom WB mode on the onscreen menu and specify that image. In a substantial upgrade from the EOS Digital Rebel camera, the flash color data transmission function from the EOS 20D enables the built-in flash or an accessory Speedlite 580EX to provide flash color information which is used in exposure calculation when the white balance is set to AWB or Flash. The EOS Digital Rebel XT camera shares its white balance correction and bracketing functions with the EOS-1D Mark II, EOS-1Ds Mark II and EOS 20D. Both the blue/amber and the magenta/green biases can be set up to +/- 9 levels. The user can correct or change the color temperature for the white balance mode currently set. One can therefore obtain the same effects usually provided by color temperature conversion filters or color correction filters. Blue/amber and magenta/green corrections can be set in combination. The setting screen is the same as the EOS 20Ds, but the setting operation differs. The cross keys set the desired white balance correction and the electronic dial sets the bracketing.
0 0.2 0.4 0.6 CIE xy color graph 0.8
0.6 Blackbody radial locus
White fluorescent light 0.4 Daylight 0.2 Tungsten light bulb
B: Blue A: Amber G: Green M: Magenta 0.8
In addition to the blue/amber bracketing offered in the EOS Digital Rebel camera, the EOS Digital Rebel XT camera also provides magenta/green bracketing. Either range, but not both, may be set. When the shutter is released, three images are created, each with a different bias setting in a range of up to +/- 3 levels in 1-level increments. White balance correction and auto exposure bracketing (AEB), can be set in combination with WB-BKT. When AEB and WB-BKT are combined, a total of 9 images will be saved to the CF card. WB-BKT does not work during RAW and RAW + JPEG shooting, since white balance settings can be adjusted during post-processing with the supplied software.

Controls

Along with its new 8-megapixel sensor, one of the biggest differences between the EOS Digital Rebel XT camera and its predecessor, the EOS Digital Rebel camera, is its system of controls and preferences. Of course, the camera can be operated in a fully automatic mode so that it can be use by inexperienced Manual exposure Aperture-priority AE photographers. After brief experience with the Auto Depth-of-Field AE Shutter-priority AE exceptional quality of the images the XT camera Program AE produces, there is every expectation that the vast Full Auto majority of XT camera users will explore, and inevitably find indispensable, the many ways in Portrait Flash Off which the camera can be made to do exactly what Landscape Night portrait the user wishes. It is a delight to use such a tool. Close-up

Sports

Processing Parameters The Digital Rebel XT camera has the same range of image processing parameters as the EOS 20D: Parameter Set 1 (contrast, sharpness and color saturation set to +1) is optimized for vivid, sharp images upon which no retouching will be performed before direct printing. Parameter Set 2 (contrast, sharpness, color saturation and color tone set to 0, i.e., mid-scale), is optimized for images that will be retouched or adjusted. Parameter Sets 3, 4 and 5 can be customized by the user for contrast, sharpness, color saturation and color tone. There is also a monochrome Parameter Set that makes black and white photography easy and great fun. This set incorporates five levels each of contrast and sharpness in addition to filter effects (none, yellow, orange, red and green) that are just like camera filter effects and toning effects (none, sepia, blue, purple, green) that use digital processing to produce prints that look like vintage photochemical artifacts In the Basic Zone modes, Parameter Set 1 is set automatically. In the Creative Zone modes, all six Parameter Sets are available.

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.

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.