The EOS Rebel XSi's 35-zone evaluative metering system with improved white balance analyzes light based on each zone in the viewing area, enabling the camera to choose the overall best exposure for the entire scene. It now features a spot meter, which reads a tiny area (about 4%) of the picture for extremely precise metering. It also provides Center-weighted average metering and partial metering for accurate exposure no matter the situation. The EOS Rebel XSi also has an improved, high magnification viewfinder that provides a larger overall view, and increased brightness and clarity. And the EOS Rebel XSi has a Display-Off sensor that automatically turns the LCD monitor off whenever the camera is at the photographer's eye. All relevant shooting information, including ISO, is displayed right in the viewfinder so it's easy to change settings without moving the camera away from the eye.
EOS Integrated Cleaning System
Photographers who must change lenses in dusty environments will find the advanced Canon EOS Integrated Cleaning System a tremendous time saver. Dust that settles on the sensor surface is removed using ultrasonic vibration. This Self Cleaning Sensor Unit routine is automatically activated whenever the camera is powered on or off. (It can also be manually activated.) A special collar positioned around the sensor collects the loosened dust. Dust particles can also be automatically removed via software. By shooting a plain white subject, the photographer can acquire dust position data that is transmitted along with the image (whether JPEG or RAW). Canon Digital Photo Professional (DPP) version 3.3 or later software can be used to manually or automatically erase the dust spots. It's not one feature, it's a built-in system to minimize the effect of dust in high-resolution digital images.
Self Cleaning Sensor Unit
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 against this, the EOS Rebel XSi 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 Rebel XSi has a new coating on the front surface of the low-pass filter, to increase its resistance to dust sticking to the sensor.
Self Cleaning Sensor Unit Construction Diagram
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 version 3.3 and later software. This added software option ensures the cleanest possible image, perfect for printing or archiving.
Picture Style settings
With the EOS Rebel XSi's Picture Style technology, photographers can change the look of their digital photographs. Color, saturation, sharpness and contrast settings create noticeable variation in the saved image. Changing a Picture Style setting is almost like a 35mm film user switching from one type of color film to another. In addition to six preset Picture Style settings, Canon offers additional downloadable "Picture Style Files", that can be installed into your camera for even more imaging options at your fingertips.
Standard (default setting)
Vivid, sharp images; usable in a wide variety of conditions; optimal for direct printing without post-processing
Warmer skin tones, with slight increases in contrast and sharpening.
Extremely bright, saturated and sharpened images, with emphasis on blue and green color saturation.
Low sharpening, contrast and saturation: the ideal starting point for image-editing in the computer.
Accurate reproduction of the subject's colors based on colorimetric data; assumes 5500K light source
Black & White images; adjustable contrast, sharpening, as well as color toning and effects of traditional color filters.
Highlight Tone Priority
This vital Custom Function lets photographers get even better detail in bright highlights, even in contrasty lighting conditions. It's beneficial for nearly any type of picture, from mid-day shots on a safari to portraits in sunlight, where a user may encounter bright highlight areas where he or she wants to preserve details. Finally, there's no impact on the camera's shooting speed or burst rate when Highlight Tone Priority is engaged. It takes full advantage of the EOS Rebel XSi's new 14-bit per channel conversion, meaning there are 16,384 distinct colors from darkest to lightest in each color channel.