From Amazon.com:

Manufacturer Description
Canon’s new EOS 50D bridges the gap between the novice and the seasoned pro with a perfect combination of high-speed and quality. It features an APS-C sized 15.1-megapixel CMOS sensor for tremendous images, new DIGIC 4 Image Processor for fine detail and superior color reproduction, and improved ISO capabilities up to 12800 for uncompromised shooting even in the dimmest situations. It features a refined 3.0-inch Clear View LCD (920,000 dots) monitor, supercharged Live View Function with Face Detection Live mode, plus a number of new automatic Image Correction settings and HDMI output for viewing images on an HDTV. Pick up the EOS 50D and you’ll experience true digital inspiration!

Canon EOS 50D Digital SLR Highlights

New 15.1-megapixel CMOS sensor with improved noise reduction

The EOS 50D features a newly-designed 15.1-megapixel APS-C sized CMOS sensor which is capable of recording up to 4752 x 3168 pixels with full 14-bit A/D conversion for extremely fine tonal gradation. Ready to capture images in an instant, the sensor is designed to work with Canon’s EF and EF-S lenses with a conversion factor of 1.6x. It’s capable of recording at sensitivities previously too noisy for shooting in low light or subjects in motion. With a maximum ISO rating of 12800 combined with a 4-level High ISO speed noise reduction function, images that would have been impossible without the use of a strobe or flash become simple to record.

Next generation DIGIC 4 Image Processor for faster processing
The EOS 50D operates with such effortless speed that operation is nothing short of intuitive. With instant startup times, speedy autofocus and minimal shutter lag, the EOS 50D is one of the fastest cameras available today. It can shoot up to 6.3 fps, in bursts of up to 90 JPEGs (using an UDMA CF card), 60 JPEGs (using a CF card) consecutively or 16 RAW files, so you’ll never, ever miss a shot.

DIGIC 4 Image Processor
This next generation DIGIC 4 Image Processor offers finer details and even more natural color reproduction, compared with the previous DIGIC III Image Processor. Since Canon’s DIGIC 4 chips use advanced signal processing technologies, they provide even faster operations, including write times to UDMA cards. It also enables Face Detection Live mode to detect and focus up to 35 face(s) to capture the best possible shot. Further, DIGIC 4 offers the improved Auto Lighting Optimizer that corrects brightness and contrast automatically, and Peripheral Illumination Correction for up to 40 EF lenses. DIGIC always maximizes performance between the capturing and recording stages of digital photography.

3.0-inch Clear View LCD The EOS 50D features a bright, high resolution, 3.0-inch Clear View LCD monitor with 920,000 (dots/VGA) pixels and a broad viewing angle of 160 degrees horizontally and vertically. It offers a brighter and more detailed display than the EOS 40D, includes a new smudge-resistant coating, and is perfect for accessing camera settings like ISO, Metering modes AF Point selection and flash options. Plus, it’s superb for reviewing, editing and deleting photos or composing new images in Live View Function.

Enhanced Live View shooting includes Face Detection Live mode
The EOS 50D features Canon’s most advanced Live View shooting thanks to the number of focusing modes available including Quick mode, Live mode and Face Detection Live mode. You can zoom in and navigate the composition 5x or 10x normal size, enabling critical focus. There’s even 2 overlay grid options, perfect for lining up vertical and horizontal lines. In the studio, the camera can be controlled remotely with Live View Function when the camera is connected to a computer through a USB cable, or wirelessly if the optional Wireless File Transmitter WFT-E3A is used.

9 cross-type high-precision sensors for accurate target subject acquisition
The EOS 50D has a high-precision 9-point wide area AF that uses cross-type points at f-stops of f/5.6 or faster, enabling the camera to focus faster, more accurately, and in difficult lighting situations. AF sensitivity is a stunning EV-0.5 to EV18. Adding to this AF performance, the EOS 50D incorporates a diagonally mounted cross-type sensor that is sensitive to both vertical and horizontal lines at f/2.8, perfect for enhanced operation in dim light. The EOS 50D has a number of focus modes, including One-Shot AF, AI Focus AF and AI Servo AF.

New Lens Peripheral Illumination Correction setting
Canon’s exclusive Lens Peripheral Illumination setting takes into account any light falloff in the corners of the frame and corrects it, making for a perfectly exposed image. Correction data are detected automatically on a number of Canon EF lenses and can be entered manually through included the Canon EOS Utility software.

Updated EOS Integrated Cleaning System
The EOS 50D’s Self Cleaning Sensor Unit eliminates stray dust that enters the camera when changing a lens or when out in the field. The sensor’s IR-cut/Low-pass filter cleans itself automatically with ultrasonic vibrations every time the camera is turned on or off and features a new flourine coating to minimize dust adhesion. Dust missed by the cleaning unit is captured by Canon’s Dust Delete Data Detection software and can be erased from the image file.

Self Cleaning Sensor Unit
A key element of minimizing dust is preventing it from clinging to the front surface of the imaging sensor. To combat this, the EOS 50D features a Canon-designed Self Cleaning Sensor Unit. The low-pass filter at the front of the sensor shakes off dust automatically with ultrasonic vibrations, removing dust from the sensor assembly. The EOS 50D also has a coating on the front surface of the low-pass filter, to increase its resistance to dust sticking to the sensor.

Dust Delete Data Detection

Dust Delete Data Detection
Dust that may still remain on the front of the sensor can also be erased with software included in Digital Photo Professional (DPP) Version 3.3 or later software. A simple test shot of a plain, white object can be taken, using a menu setting. This Dust Delete Data image is analyzed in-camera, and the location and size of any remaining dust is added to any subsequent pictures taken. This data is transmitted along with the image, whether JPEG or RAW, and can be either manually or automatically erased in Canon’s DPP software. This added software option ensures the cleanest possible image, perfect for printing or archiving.

Creative Auto goes a step beyond full auto with on screen setting display The EOS 50D has a new Creative Auto mode and a quick control screen that helps novice users narrow the gap between fully automatic and manual control. While the camera will remain by default in fully automatic mode, frequently changed settings like flash, exposure compensation, image quality and more are all accessible through one easy screen interface designed for intuitive, quick action. A provided shooting guide serves as a quick-reference for on-the-fly operation.

HDMI output for displaying full high-resolution images on a HDTV The EOS 50D includes a new HDMI (High Definition Multimedia Interface) output device that enables High Definition display of your photographs on any HDTV with HDMI ports. It’s remarkable to behold the details of your photographs in Full HD, and it’s easy with the EOS 50D. Resolution is set automatically to match the TV to which you’ve connected, and images are displayed in a full-frame 3:2 ratio with blacked out bars to the left and right of the image.

Compatible with over 60 Canon EF/EF-S lenses and most EOS System accessories

EF & EF-S Lenses
The EOS 50D is compatible with all Canon lenses in the EF and EF-S lineup, ranging from ultra-wide angle to super telephoto lenses. Canon lenses employ advanced optical expertise and micron-precision engineering to deliver unprecedented performance in all facets of the photographic process. Special optical technologies, such as Aspherical, ultra-low dispersion, or fluorite elements are featured in the universally acclaimed L-series lenses. And Canon’s Optical Image Stabilizer technology is featured in select lenses to minimize the effect of camera shake. Through Canon lenses, photographers can truly maximize the quality and liberating performance of the EOS 50D.

Flash Photography
The EOS 50D features the acclaimed E-TTL II flash metering system. With any of the flashes in the EX Speedlite line, E-TTL II provides reliable flash output whether shooting fill-in flash pictures in sunlight, or using flash in total darkness. With E-TTL II, the exact same 35-zone metering sensor used for measuring ambient light is also used for flash metering–giving even finer metering command of the image area. If you prefer a broader area for flash metering, there’s a menu setting to change to “Average” flash metering–where the entire 35-zone area is measured evenly for flash exposure.

Software

Canon EOS Digital Solution Disk (Version 17.0)
The EOS 50D comes bundled with an updated Canon EOS Digital Solution Disk, which features powerful software programs designed to extend the EOS experience to the computer. These include Canon’s EOS Utility (Version 2.5), Digital Photo Professional (Version 3.5), ZoomBrowser EX for Windows (Version 6.2), ImageBrowser for Macintosh OS X (Version 6.2), the Picture Style Editor (Version 1.4), PhotoStitch (version 3.2), WFT Utility (version 3.2). Each application is designed to perfect the captured images and streamline the digital workflow.

EOS Utility (Version 2.5) for Macintosh or Windows handles the connection between the camera and computer, whenever they’re connected via USB. It allows remote controlled shooting from the computer, handles downloading of images from the camera to the computer, and allows seamless linking to either Canon’s ZoomBrowser/ImageBrowser or Digital Photo Professional software once images have been copied to the hard drive. Furthermore, it’s used to upload settings back into a USB-connected camera.

Digital Photo Professional (Version 3.5) is an image processing program that enables high-speed RAW image processing, high-speed previewing for real-time image adjustment and support for sRGB, Adobe RGB and Wide Gamut RGB color spaces. Because it’s CMS (Color Management System) compatible, Digital Photo Professional allows for easy image layout and printing in Adobe RGB in conjunction with Easy-PhotoPrint and PictBridge printers. It also features the Dust Delete Data Detection tool for cleaner images.

ZoomBrowser EX (Version 6.2) for Windows and ImageBrowser (Version 6.2) for Mac OS X are the easy, user-friendly options for viewing and editing of JPEG and even RAW image files. Both allow viewing of numerous types of images including finished TIFF and BMP files. Both also have a variety of search options for finding images, allow re-naming of single images or batches of files, and offer a variety of options for printing without using a separate image-editing program.

Picture Style Editor (Version 1.4)
Canon’s Picture Style Editor enables photographers to create custom Picture Style profiles that can be used to customize the appearance of JPEG and RAW images captured with EOS Digital SLR cameras. Picture Style files created with Picture Style Editor can be loaded into the EOS cameras that support Picture Style and may also be used when processing RAW images in Canon software applications Digital Photo Professional, ZoomBrowser EX (for Windows) and ImageBrowser (for Mac).

Product Description
Canons new EOS 50D bridges the gap between the novice and the seasoned pro with a perfect combination of high-speed and quality. It features an APS-C sized 15.1-megapixel CMOS sensor for tremendous images, new DIGIC 4 Image Processor for fine detail and superior color reproduction, and improved ISO capabilities up to 12800 for uncompromised shooting even in the dimmest situations. It features a refined 3.0-inch Clear View LCD (920,000 dots) monitor, supercharged Live View Function with Face Detection Live mode, plus a number of new automatic Image Correction settings and HDMI output for viewing images on an HDTV. Pick up the EOS 50D and youll experience true digital inspiration!

From Amazon.com:

Manufacturer Description
Building on the success of Canon’s perennially popular “prosumer” EOS 20D and 30D models, the EOS 40D advances the state-of-the-art for mid-range digital SLR cameras, making it a natural first choice for advanced amateur photographers and entry-level professionals, and an ideal second body for more established photo pros. Indeed, given the level of feature upgrades and improvements, technological wizardry, and user-requested creative controls, the Canon EOS 40D SLR’s “prosumer” appellation may refer more to its accessible price point than to the exceptional quality, clarity, and resolution of the images it creates.

From the camera’s newly enhanced, 10.1-megapixel CMOS imaging sensor (designed and manufactured by Canon) and its proprietary and super-efficient DIGIC III image processor, to its completely redesigned autofocus sensor and fast, 6.5 frame-per-second (fps) continuous shooting capability (for bursts of up to 75 Large/Fine JPEGs or 17 RAW images), the EOS 40D SLR puts the fun in functionality and makes serious photo business a positive pleasure.

Indeed, at 6.5 fps, no digital SLR in the EOS 40D mid-range class and price category has so high a continuous shooting capability, making it ideal for shooting–and actually capturing–speed-sensitive outdoor and wild-nature shots as well as a wide variety of action and sports scenes. The speed of the EOS 40D SLR comes from Canon’s balanced combination of its latest processor, DIGIC IIII, DDR SDRAM high-speed memory, four-channel-per-line sensor readout, and two separate motors for shutter and mirror operation.

Canon EOS 40D Highlights

Display’s the Thing The most easily visible upgrade on the EOS 40D Digital SLR is the camera’s larger 3.0-inch LCD screen (compared with the EOS 30D’s 2.5-inch monitor). Still, size is only the beginning of the difference between these two cameras’ displays. In order to increase viewing ease in outdoor conditions such as bright sunlight, Canon raised the brightness level of the EOS 40D camera’s 230,000-pixel LCD screen, broadened the color gamut, and narrowed the viewing angle from 170 degrees to a still wide 140-degree perspective in all directions. An added advantage of the larger-sized display is the ability to use a larger font size for text, making it easier to read setting and menu options on the screen. The camera’s menu is organized in the same tabbed format as the EOS-1D Mark III Digital SLR.

Canon extends its “ease-of-reading” policy to the EOS 40D SLR’s viewfinder as well. The upgraded viewfinder increases optical magnification from 0.90x to 0.95x, expands the viewing angle from 251 degrees to 264 degrees and raises the eye point from 20mm to 22mm.

Enhanced Durability Recognizing the often rigorous shooting conditions encountered by professional and advanced amateur photographers, Canon design engineers made the EOS 40D SLR’s magnesium alloy exterior even more ruggedly dependable than its predecessors with upgraded dust- and weather-resistant construction, particularly around the camera’s connection ports, battery compartment, and single-slot compact flash (CF) memory card door. Should the user inadvertently open the compact flash card door while the camera is writing to the card, a warning will pop up on the LCD screen and an open door “alarm” will sound, but the image(s) will continue writing to the memory card without interruption. The EOS 40D SLR also retains many of the outstanding features of the EOS 30D model, such as its fast 0.15-second initial start-up, its extremely durable shutter (rated up to 100,000 cycles), its top shutter speed of 1/8000 second, and 1/250 maximum X-sync flash shutter speed setting.

Improved Image Quality Although it is based on the image sensor used in the EOS Digital Rebel XTi, the EOS 40D Digital SLR’s 10.1-megapixel CMOS APS-C size image sensor has been significantly improved thanks to the use of larger microlenses over each pixel to reduce noise and expand sensitivity up to ISO 3200. The EOS 40D retains the model 30D camera’s 1.6x focal length conversion factor (compared to full-frame digital image sensors or 35mm film) and is compatible with the full line-up of Canon EF lenses as well as the Company’s expanding selection of high-quality, affordable EF-S lenses created specifically for Canon digital SLRs with APS-C size image sensors.

Adding to the improved virtuosity of the images captured by the EOS 40D SLR is the camera’s 14-bit Analog-to-Digital (A/D) conversion process. Able to recognize 16,384 colors per channel (four times the number of colors recognized by the EOS 30D SLR’s 12-bit conversion capability), the EOS 40D camera is able to produce images with finer and more accurate gradations of tones and colors. The EOS 40D also incorporates the optional Highlight Tone Priority and High-ISO Noise Reduction functions first introduced earlier this year with the EOS-1D Mark III Professional Digital SLR.

DIGIC III DIGIC III is the latest generation of Canon’s proprietary image processing engine. DIGIC III technology ensures that the fine details and natural colors of the images are optimally recorded and, as an added bonus, is also responsible for the EOS 40D SLR’s high-speed performance, faster signal processing, and even its efficient energy consumption.

sRAW In addition to retaining the RAW image capture capabilities of its predecessors, the EOS 40D SLR now offers a more manageable “sRAW” recording format. In sRAW mode, the number of pixels is reduced to one-fourth that of a standard RAW image and the file size is cut in half, while retaining all of the flexibility and creative possibilities associated with full-size, conventional RAW images.

Improved Autofocus and Exposure Control While the EOS 40D SLR maintains the nine-point wide area AF coverage first introduced on the EOS 20D camera, Canon has made significant improvements to its speed, precision, and functionality, minimizing subject recognition problems in the process. The EOS 40D camera’s completely redesigned nine-point AF sensor provides cross-type AF measurement at all nine focusing points for maximum apertures up to f5.6, and for the first time in any EOS camera, the central AF point offers enhanced precision for both vertical and horizontal subject contrast when using EF or EF-S lenses featuring maximum apertures of f2.8 or faster. AF calculation speed with the EOS 40D camera is 30 percent faster than the EOS 30D model.

The Canon EOS 40D Digital SLR retains the same 35-zone metering sensor as its predecessor. Available patterns include Evaluative metering, which is linked to all AF points and is set automatically in the Basic Zone modes, Centerweighted average metering, Partial metering, and Spot metering, covering approximately 9 percent or 3.8 percent of the viewfinder at center, respectively. The camera’s E-TTL II autoflash and 12 exposure control modes (11 AE modes plus manual) are also unchanged from the EOS 30D SLR model. However, as a result of consumer input, Canon has added three Custom exposure modes. As an added convenience, particularly for wireless flash operations, users can adjust the flash settings of the Canon Speedlite 580EX II directly from the camera.

The Canon EOS 40D camera offers ISO speeds from ISO 100 to ISO 1600 in 1/3-stop increments. Users can also opt for a high-speed setting of ISO 3200. For the first time in any EOS camera, the 40D model offers Auto ISO capability in Creative Zone exposure modes. This valuable new feature adjusts the ISO speed to the optimal setting based on low light or shaky shooting conditions. Additionally, the EOS 40D provides full-time display of the active ISO speed setting, both in the viewfinder as well as on the top LCD data panel.

The Canon EOS 40D Digital SLR is also the first camera in its class to offer two interchangeable focusing screens in addition to the standard precision matte screen. Users can opt for a grid-type focus screen that makes it easier to verify horizontal or vertical alignment while determining image composition, as well as the Super-Precision Matte focusing screen that makes it easier to grasp the “sweet spot” of manual focusing when using a lens with a maximum aperture of f2.8 or faster.

Enhanced Live View Previously the province of the EOS-1D Mark III DSLR (one of Canon’s top-tier professional cameras), the Live View function now gives EOS 40D camera users an expanded and exceedingly convenient and comfortable set of shooting options. By permitting the framing and capturing of subjects using the camera’s LCD screen instead of the viewfinder, the shooter gains a 100 percent field view to more easily achieve the desired composition. A new Custom Function on the EOS 40D allows autofocus during Live View by pressing the camera’s AF-ON button. At that point, the reflex mirror goes down and AF is carried out in the normal way. Letting go of the AF-ON button resumes Live View functions. Also, in the Live View shooting mode the user can magnify the image by five or ten times in order to ensure that the shot is optimally focused. Live View is at its best during tripod shooting–particularly for close-up photography where precise focusing is imperative. As a side benefit, the Live View shooting mode helps to reduce vibration by lifting the reflex mirror out of the optical path well in advance of the exposure, improving image quality at slow shutter speeds. A new electronic 1st-curtain shutter function in Live View mode reduces release time lag and operational noise even further to avoid spooking wildlife or disturbing people nearby with unwanted camera sounds. Additionally, as the release time lag is miniscule, even instantaneous movements like a bird taking flight can be readily captured.

EOS Integrated Cleaning System First introduced on the EOS Digital Rebel XTi camera, the EOS Integrated Cleaning System is a prime example of trickle-up technology and is now becoming a standard feature on all new EOS Digital SLRs. The camera’s Self-Cleaning Sensor Unit uses ultrasonic vibrations to literally shake dust particles off of the low-pass filter in front of the sensor each time the camera is powered up or shut down. Users also have the option of engaging the “clean now” function at will or bypassing it altogether. Additionally, the EOS 40D SLR’s manual sensor cleaning function raises the mirror and allows users to clean dust that has stuck to the low-pass filter. Dust that has been shaken or blown loose is then trapped by adhesive at the base of the sensor unit housing, preventing the problematic particles from reattaching themselves to the filter when the camera moves. The second part of the cleaning system is a software solution that maps the location of any spots that may remain on the sensor. The mapped information is saved as Dust Delete Data and attached to the image file. Subsequently, the offending dust information is subtracted from the final image during post processing with a compatible personal computer, using the supplied Digital Photo Professional software.

Improved Software Among the most valuable features of the Canon EOS 40D Digital SLR is its compatibility with Canon’s Picture Style Editor (PSE) 1.0 software. With PSE, shooters can actually design the look of their photographs by inputting their own preferred style, color, and tone curves. The EOS 40D Digital SLR also ships with the latest versions of Canon’s powerful software applications, including Digital Photo Professional 3.1 and EOS Utility 2.1, which now support the camera’s Remote Live View and Dust Delete Data functions, as well as incorporating a broad range of additional improvements designed to improve image quality and speed up workflow. Also included are ZoomBrowser EX 5.8 and ImageBrowser 5.8 for easy browsing, viewing, printing, and archiving with compatible computer operating systems, including Microsoft Windows Vista and Windows XP, as well as Mac OS X.

Accessories (Not Included–Must be Purchased Separately) New system accessories for the EOS 40D SLR include the redesigned high-capacity Battery Grip BG-E2N, which facilitates high-volume shooting and easier vertical shooting. Compatible with up to two BP-511A battery packs or a set of six AA-size batteries, the battery grip approximately doubles the number of shots that can be taken, compared with the battery power of the EOS 40D SLR alone. The BG-E2N grip features new sealing material around the battery compartment to better resist water and dust. The new model replaces the original BG-E2 grip and is compatible with the EOS 20D, 30D, and 40D models.

Designed exclusively for the EOS 40D SLR, the new Wireless File Transmitter WFT-E3A permits wireless transfer and back-up, as well as remote control of the camera in Live View mode. It can also be connected to various GPS receivers or Hi-Speed USB 2.0 external storage devices such as convenient flash drives or high-capacity hard drives with much larger storage capacity than the memory cards in the camera for instant back-up as images are captured. Compact and affordable, the WFT-E3A wireless transmitter also doubles as a vertical grip and requires its own BP-511A battery pack in addition to the battery installed in the camera body.

What’s in the box: EOS 40D digital SLR body, eyecup Eb, wide neck strap EW-100DGR, video cable VC-100, USB interface cable IFC-200U, battery pack BP-511A, battery charger CG-580, “Great Photography is Easy” booklet and “Do More with Macro” booklet, EOS Digital Solution Disc, software instruction manual

• Alien Bees have a plastic case, and the White Lightning’s have a more durable aluminum case.
• The White Lightning units weigh more (4.1 lbs vs 2.1 lbs for 800 W units), and thus aren’t quite as easy to transport as the Alien Bees
• The Alien Bees flash units have a 150W modeling bulb, and the White Lightning uses a 250W modeling bulb.
• The White Lightning has separate manual controls for the flash and modeling power while the Alien Bees has a single control for them both.
• The Aliens Bees circuitry is more compact, and thereby runs hotter
• White Lightning has a 5 year warranty, Alien Bees warranty is 2 years
• White Lightning use multiple smaller capacitors for faster recycling
• Alien Bee units use a new and unique design on the power supply where the very heavy power transformer has been eliminated. The White Lightning units use a more traditional design with the transformer in the power supply.
• The White Lightning lights can be adjusted over a 7 stop range, whereas the Alien Bees can be adjusted over 5 stops
• The White Lightning units use multiple circuit cards, instead of a single one like the Alien Bees which makes repair easier

These are the main functional differences between the two, do you know of any others?

Digital SLR Camera Reviews Summary:

Who this camera is for:

• Point and Shoot power users looking to learn more about photography and learning how to use SLR cameras
• Existing Canon SLR photographers who would like something lighter for traveling but still an SLR format
• Point and shoot users looking to make better quality prints
• An extra SLR camera for wedding photographers, etc

Who this camera isn’t for:

• Photographers looking to take photos in tricky or low-light photography conditions
• Existing photographers looking to switch from a film SLR to a digital SLR
• Anyone looking for a very durable, long lasting SLR
• Someone who needs video capability

From the manufacturer:
The Canon EOS Digital Rebel XTi offers an unbeatable combination of performance, ease-of-use and value. It has a newly designed 10.1 MP Canon CMOS sensor plus a host of new features including a 2.5-inch LCD monitor, the exclusive EOS Integrated Cleaning System featuring a Self Cleaning Sensor and Canon’s Picture Style technology, all in a lightweight, ergonomic body. The Digital Rebel XTi is proof positive that Canon continues to lead the way with their phenomenal digital SLRs.

Product Description
The Canon EOS Digital Rebel XTi has a newly designed 10.1 MP Canon CMOS sensor plus a host of new features including a 2.5-inch LCD monitor, the exclusive EOS Integrated Cleaning System featuring a Self Cleaning Sensor and Canon’s Picture Style technology, all in a lightweight, ergonomic body. The EOS Digital Rebel XTi is compatible with all Canon lenses in the EF lineup, ranging from ultra-wide angle to super telephoto lenses, and including Canon’s EF-S series lenses, manufactured specifically for Canon’s APS-C sized digital sensor. Canon’s Speedlite 430EX is perfectly suited to the EOS Digital Rebel XTi. In addition to Canon’s EF lenses and Speedlite flashes, many other accessories are designed by Canon to work perfectly with the EOS Digital Rebel XTi. The Battery Grip BG-E3 adds a vertical shutter release, and can hold two NB-2LH Battery Packs for increased shooting capacity. Canon’s Semi Hard Case EH18-L can accommodate the EOS Digital Rebel XTi with a small zoom lens. An EF 18-55mm is included in the EOS Digital Rebel XTi Lens Kit. Image Sensor Type – High-Sensitivity, high-resolution, single-plate, CMOS sensor 3 – 2 Aspect Ratio Recording Format – JPEG, RAW, and RAW+JPEG simultaneous recording provided USB 2.0 Hi-Speed Interface, mini-B port, NTSC/PAL for video output Viewfinder Type – Eye-level SLR with pentamirror Shutter Speeds – 1/4000 to 30 seconds Self-timer – 10 seconds delay, 2 seconds delay with C.Fn-7-1 (mirror lockup) Continuous Shooting Speed – Approx. 3 fps (at shutter speed of 1/250 sec. or faster) Compatible Printers – CP and SELPHY Compact Photo Printers, PIXMA Photo Printers and PictBridge compatible printers (via USB Interface Cable IFC-400PCU) Power Source – One Battery Pack NB-2LH Image storage on CompactFlash Type I or II type memory cards (Not included) Dimensions – Width 4.98 x Height 3.71 x Depth 2.56 inch, 126.5 x 94.2 x 65mm / Weight – 18 ounces

Overall details from Amazon.com:

10.1-Megapixel APS-C Size CMOS Sensor
Canon’s large-area CMOS (Complementary Metal Oxide Semiconductor) sensor captures images with exceptional clarity and tonal range, and offers the most pixels in its class. This APS-C size sensor (22.2 x 14.8mm) has the same 3:2 ratio as film cameras, enabling an effective angle of view that is 1.6x the normal EF lens focal length. With pixel resolution of 3,904 x 2,598, the Digital Rebel XTi not only offers the most pixels in its class, but bests many professional-level cameras. Recorded on Canon’s CMOS sensor, each pixel is captured with fine detail to create images of tremendous depth, nuance, and resolution, ensuring enough information for even poster-sized prints.

DIGIC II Image Processor
The EOS Digital Rebel XTi is the product of Canon’s extensive in-house development: The DIGIC II Image Processor was designed specifically for Canon digital SLR cameras and enhances every aspect of image capture. Information captured by the CMOS sensor is processed and assembled into images of exceptional quality. With the DIGIC II Image Processor on board, photographers can expect natural color reproduction, precise white balance in any number of lighting situations, and unparalleled clarity. The DIGIC II Image Processor employs sophisticated signal processing algorithms and works at greater speeds, all while consuming less energy. The entire processing chip–not just the software that drives it–is dedicated for use in a digital still camera.

Responsive and Reliable
The EOS Digital Rebel XTi has a brilliant 2.5-inch LCD monitor with approximately 230,000 pixels. Also used in Canon’s Professional EOS SLRs, this screen displays more than images. Shooting information and playback are both displayed on the LCD, so that the photographer can see all of the shooting information simultaneously on one screen. Not only can images be viewed larger than on the Digital Rebel XT, they can be viewed at a greater angle (160 degrees) than many other conventional LCD monitors.

Display Off Sensor
When composing images, the Digital Rebel XTi’s external display turns off automatically thanks to the newly developed Display Off Sensor. This new sensor detects the photographer’s face against the back panel of the camera, and turns the screen off to prevent the LCD monitor’s brightness from disturbing the photographer’s eye while looking through the viewfinder.

Speedy Operation
With a startup time of 0.2 seconds, the EOS Digital Rebel XTi is ready to go the instant it’s brought to the eye. And the Digital Rebel XTi’s shutter can record images as fast as 1/4000 seconds and as long as 30 seconds, plus bulb at up to 3 frames per second (fps) for 27 consecutive shots. It synchronizes with Canon Speedlites at 1/200 second.

EF-S 18-55mm f3.5-5.6 USM Standard Zoom Lens
This kit includes a standard zoom exclusively for the EOS Digital Rebel and EOS 20D SLR cameras, with APS-C size image circle equivalent to an approximately 28-90mm focal length. The lens is compact and ultra-lightweight with impressive close-focusing ability of 0.9 feet (0.28 meters). It features optimized coating for digital imaging sensor to minimize ghost images and flare.

9-Point AF
The EOS Digital Rebel XTi has a high-precision 9-point AF system for speedy and accurate focusing in any situation. Conveniently located on the back of the camera for thumb-controlled action, Canon’s cross key buttons enable instant choice of the 9 focus points or allow the camera to choose them automatically. One-Shot is perfect for still photography. AI Servo AF tracks moving subjects, ensuring accurate focus. AI Focus AF switches between One-Shot and AI Servo when subjects are moving and stopping. The Digital Rebel XTi’s focusing system functions in metering ranges of EV-0.5 to 18 and displays information on the Digital Rebel XTi’s big LCD display.

I have spent many, many hours comparing camera brands, SLR bodies, lenses, and many other things contemplating what to use for my own setup.  While I will never reach any sort of final decision as I am always learning new things, I thought this would be a good format to pass on my own conclusions and research and start interesting discussions via blog comments about the various pieces of equipment out there.

Anyhow, welcome to the site, and hopefully I will start posting some real reviews very soon.