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Furthermore, a bit of adhesive surrounding the sensor is designed to grab the dust, keeping it from flying around inside the camera chassis.

Similarly to many other dSLRs, the low-pass filter layer vibrates when the camera powers off or on in order to shake dust away from the sensor plus, there's an antistatic coating on the filter that repels dust. To keep up with the camera Joneses, the CMOS chip in the XTi is now self-cleaning. Most amateurs will find all the essentials: a handful of manual, semimanual, and automatic exposure modes user-selectable nine-point autofocus, and AI Servo autofocus for moving subjects and simultaneous raw-plus-JPEG capture. The kit version comes with the f/3.5-to-f/5.6, 18mm-to-55mm EF-S lens (28.8mm-to-88mm equivalent, thanks to the XTi's 1.6X conversion factor), which is a trifle too slow for frequent indoor shooters like me. Attached to the substantially larger and heavier 16mm-to-35mm (25.6mm-to-56mm equivalent) lens or the Speedlite 580EX flash, however, makes the XTi feel a bit lopsided.įor better-or sometimes worse-the feature set of the Canon EOS Rebel XTi remains roughly the same as the XT's. With the small, exceptionally light kit lens, the camera felt well balanced in my hands. Sticking with similar sensor dimensions allowed Canon to keep the same moderately compact design for the EOS Rebel XTi, though it weighs 4 ounces more than its 17.1-ounce predecessor. Whatever the reason, it yields mixed results.

Perhaps the Nikon D80 upped the stakes perhaps Canon felt it was an inevitable necessity. But when its predecessor-in this case, the EOS Rebel XT-was renowned for producing excellent, low-noise photos at a more-than-adequate 8-megapixel resolution, it's risky to replace it with a higher-resolution but potentially lower-sensitivity chip as Canon did with the EOS Rebel XTi.

Now, changing sensors isn't normally considered terribly daring when it comes to digital cameras. Canon is usually pretty good at adhering to that philosophy, making only minor changes to successful products and saving the daring moves for the models that need it. What's true for doctors applies equally to consumer electronics manufacturers: first, do no harm.