Canon 9-point AF system

Canon 9-point AF system

Intelligent Scene Analysis for Superb Exposure
The EOS 600D/Rebel T3i features a sophisticated, 63 zone Dual-layer sensor designed to complement the 9-point AF system. By taking into account the color and luminosity surrounding chosen AF points, this system delivers an advanced level of accuracy for better results even in difficult lighting situations. Since the metering sensor has a color measurement function, exposure errors and focus errors caused by different light sources are minimized; the EOS 600D/Rebel T3i gives stable exposure from shot to shot in situations where light changes, such as in a theater or concert hall. This makes the EOS 600D/Rebel T3i ideal for scenes with extreme difference in brightness such as brightly lit scenes or backlit scenes; the camera balances exposure of the main subject at the background, and exposures are not overly influenced by bright areas in the shot. Since the EOS 600D/Rebel T3i provides high-speed X-sync (“X-sync” means the fastest shutter speed that can synchronize with a flash burst at the moment the shutter is fully released) up to 1/200 sec., the range of photographic expression is dramatically increased, allowing the EOS 600D/Rebel T3i to be used with confidence in bright scenes or dim.