21 megapixel CMOS sensor (very similar to the sensor in the EOS-1Ds Mark III)
    Sensor dust reduction by vibration of filter
    ISO 100 - 6400 calibrated range, ISO 50 - 25600 expansion (1Ds Mark III & 5D max ISO 3200)
    Auto ISO (100 - 3200) in all modes except manual
    3.9 frames per second continuous shooting
    DIGIC 4 processor, new menus / interface as per the EOS 50D
    Image processing features:
        Highlight tone priority
        Auto lighting optimizer (4 levels)
        High ISO noise reduction (4 levels)
        Lens peripheral illumination correction (vignetting correction)
    RAW and SRAW1 (10 MP) / SRAW2 (5 MP)
    RAW / JPEG selection made separately
    Permanent display of ISO on both top plate and viewfinder displays
    AF micro adjustment (up to 20 lenses individually)
    Three custom modes on command dial, Creative Auto mode
    Image copyright metadata support
    98% coverage viewfinder (0.71x magnification)
    3.0" 920,000 dot LCD monitor with 'Clear View' cover / coatings, 170° viewing angle
    Automatic LCD brightness adjustment (ambient light sensor)
    Live view with three mode auto-focus (including face detection)
    No mirror-flip for exposures in Live View if contrast detect AF selected
    Movie recording in live view (1080p H.264 up to 12 minutes, VGA H.264 up to 24 mins per clip)
    Two mode silent shooting (in live view)
    New jump options in play mode
    HDMI and standard composite (AV) video out
    Full audio support: built-in mic and speaker, mic-in socket, audio-out over AV (although not HDMI)
    IrPort (supports IR remote shutter release using optional RC1 / RC5 controllers)
    UDMA CompactFlash support
    New 1800 mAh battery with improved battery information / logging
    New optional WFT-E4 WiFi / LAN / USB vertical grip
    Water resistance: 10 mm rain in 3 minutes