Movie mode turned out to be the 5D Mark II's trump card over its rivals, and its successor naturally offers improved capability in this regard. In terms of ergonomics, the camera gains the 7D's rear movie mode/live view switch, so you no longer have to compromise your stills Live View settings when setting up for video recording. There's a built-in headphone socket for audio monitoring, and rear control dial gains touch-sensitive 'buttons' that allow recording parameters (shutter speed, aperture, ISO and sound volume) to be changed silently. The video output specifications are essentially unchanged in terms of resolution and framerate (1080p30 maximum), but Canon says the processing is improved to minimise moiré and other artefacts, and has included the higher quality All-I and IPB interframe compression options introduced with the EOS-1D X. What you don't get though, is the uncompressed output over HDMI seen in the latest Nikon models.
There's a couple of entirely new features too; the 5D Mark III becomes Canon's first SLR capable of in-camera High Dynamic Range shooting, in an unusually well-implemented and flexible fashion, and gets expanded autobracketing options too (up to 7 frames covering a vast +/- 8 EV range). It can also record multiple exposures, if you so desire. The introduction of DIGIC 5+ means that JPEG processing (finally) includes chromatic aberration correction, based on lens profiles which are stored in-camera (and therefore limited to Canon's own lenses). Last but not least, playback mode adds the ability to compare images directly side-by-side, in a number of different views.
The 5D Mark III also gains a refreshed menu system, essentially based on that of the EOS-1D X. It's not entirely dissimilar to the 5D Mark II's (so existing users will still feel at home), but it gains a completely new tab for managing its complex AF system, based on a range of usage-scenario presets. The ordering of options has been rationalized, and a number of functions that were previously hidden deep within the custom functions have bubbled-up closer to the surface as top-level menu items, perhaps most notably mirror lockup and Highlight Tone Priority.
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