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Canon EOS 5D Mark III Digital Camera Review$3,499.00
The Canon 5D Mark III can record full 1080/30p video in ALL-I (intraframe) or IPB (interframe) compression, using the H.264 codec. The Mark III can record for a maximum of 11 minutes using the less compressed ALL-I format and an 8GB card, as it records a whopping 685 MB/minute. If you bump that down to IPB, the camera can push that to a continuous 32 minutes. You can't hot swap cards while recording video, but the camera can overflow video from one card to another. Also, while individual movie files can't exceed 4GB due to the folder structure, the camera will simply begin a new movie file without stopping recording. Find out how the performed in our video image quality test./r:link_to_content
The 5D Mark III features full manual exposure in video, including full use of the PASM shooting modes. In full manual mode the user can adjust shutter speed, aperture, and ISO sensitivity mid-recording. Autofocus can be re-established at any time while recording video, but it requires the aperture to open fully while a contrast detection method is employed. The result is a jarring disruption of the tone and flow of any video, with no continuous AF option available.
The Canon 5D Mark III allows you to shoot video in any of its shooting modes, including program auto and automatic+. When shooting video in an automatic mode you are allowed to change certain settings, though the range on some (ISO, for example) is limited. In the full automatic+ mode, however, exposure control is left entirely up to the camera, without user input. In this mode the user can merely select image quality and type, video compression and resolution, recording media destination, and little else.
Zoom control on the 5D Mark III is limited, of course, to just manually zooming with the lens. The zoom ring on the 5D Mark III's kit lens is nice and large, with large grooves that make it easy to zoom in and out. The 24-105mm f/4L kit lens offers a very useful focal range, with a zoom ratio close to 5x. The 24mm wide angle is very useful on the full frame sensor, letting you get a wider angle of view than you would otherwise have on a cropped APS-C or APS-H image sensor.
The harshest criticisms about the 5D Mark II were generally reserved for its autofocus system, which wasn't up to the standards that most professional photographers (at least the ones who need autofocus, like sports and news photographers) want it to be. The Mark III remedies this by adopting the same 61-point autofocus sensor (41 cross-type sensors) as the new 1D X. It doesn't have all the same autofocus features as the 1D X (largely due to a smaller degree of processing power), but it features the same sensor.
When shooting video, however, you are restricted to using manual focus or single AF with contrast detection, including while recording video. There's no continuous autofocus in the camera while in live view or video mode, but by pressing the AF-ON button, the camera will refocus on whatever is within the AF frame. The contrast detection AF is significantly worse than the phase detection system, as is to be expected. It will not provide any kind of smooth focus pull, as it tracks subject sharpness and goes a fair bit past the correct focus point before retracing its steps.
The 5D Mark III can automatically and manually exposure for almost its entire shutter/aperture/ISO range while in video. The ISO range is limited slightly, with a max in video recording of 12800, with expansion to 25600 in program, bulb, and aperture-priority mode. The only other limitation is to shutter speed, which can not be set to slower than 1/30th of a second for video.
The 5D Mark III includes both a 3.5mm mic jack and a 3.5mm headphone jack. This gives you the ability to use external audio recording devices and any commercially available headphone to monitor audio that is being recorded in the camera. The camera also features a built-in microphone, but it is just a monaural mic.