• Built-in extension tube so all lenses have more macro capabilities.
Image sensor, and AF sensor automatically move 12mm further from the mirror assembly when activated
• Wireless tethering via WPA2-encrypted 802.11n Wi-Fi
• Replacable VF's and focusing screens (make your Rebel brighter with a pentaprism, or waist-level finder, 45° finder, whatever) - this option existed years ago on many film bodies, but is non-existent for digital cameras outside of Hasselblad
• EF 0.625x converter for APS-C cameras (keep the original angle of view of EF lenses on crop sensors and gain 1-1.33 stops of light)