Canon 720p



Keywords: 7d,canon 7d,canon eos 7d,canon eos 7d
Description: The Canon 7D is getting old but it still packs a wallop. Read our review to find out how it compares to the Nikon D7100!

  • Canon EOS 7D Optics page (Crops from images shot with the camera's kit lens, if sold as a kit)
  • Canon EOS 7D Sample Images page (Index to all standard test shots, with explanations)
  • Canon EOS 7D Thumbnails page (Thumbnails of all shots, including RAWs, with EXIF data)
  • Canon EOS 7D Gallery page (Regular photos taken with the Canon EOS 7D)

High-definition video capture has rapidly become a must-have feature in this year's digital SLRs, with advanced amateurs and budget-minded professionals alike excited by the possibility of using the same camera body and lenses for both still and movie shooting. Most digital SLR video modes to date have had limitations in terms of control and output formats that have tempered this excitement somewhat, however.

The Canon EOS 7D's video functionality takes important steps in answering some of these criticisms, offering an unusually robust feature set that gives the photographer more control over their movies, as well as the ability to record audio from an external source. Both shutter and aperture are available for manual control, and the 7D also provides multiple frame rate options, including three that match the HD television timing specs. Like most digital SLR video modes, the Canon 7D omits continuous autofocus during video recording, which is likely more of a concern for the advanced amateur, with pros likely wanting to control focus manually regardless.

Video capability. The Canon EOS 7D offers 3 resolution levels for video recording, with various frame rates available depending on encoding and resolution.

The Canon 7D's all-new CMOS sensor records high definition video at a maximum resolution of 1,920 x 1,080 pixels with a 16:9 aspect ratio -- what's sometimes referred to as "Full HD", or 1080i/1080p. Both NTSC modes of 23.976 or 29.97 frames/second and PAL modes of 23.976 or 25 frames/second are available at full resolution. The full resolution can be downsampled in-camera to produce 1,280 x 720 (720p) resolution movies, with the NTSC mode using 59.94 frames/second, and the PAL mode offering 50 frames/second. Finally, a standard definition 4:3 aspect ratio mode captures 640x480 pixel (VGA) movies, again with 59.94 frames/second in NTSC or 50 frames/second in PAL. The numerous different frame rates match various broadcast television formats etc. removing the need to transcode to the intended output frame rate after capture.

Individual movie clips captured by the Canon EOS 7D are limited to a maximum of twelve minutes in the high definition 1080p and 720p modes, or 24 minutes in the standard definition VGA mode. (Canon didn't give a reason for this, but perhaps it's a matter of power consumption and sensor heating: We noticed that the body can get rather warm after an extended period of video shooting.) The Canon 7D records its movies as MOV files using AVC / H.264 compression, which is much more conservative of memory card space than the Motion JPEG format used by some cameras, and avoids some of the severe image quality loss suffered by AVCHD cameras when faced with significant amounts of change in image content between frames. (AVCHD uses a subset of the H.264 standard, among other things mandating a limit in recording bandwidth, which translates into a lesser ability to convey rapidly-changing detail.) The choice of H.264 comes with the requirement of greater processing power, though -- not only from the camera when recording, but also when playing back or editing videos. The more sophisticated encoding used in the H.264 standard requires quite a bit of processor power to pull it apart and put it back together again, so frame-accurate editing of H.264 requires a fast processor and capable editing program.






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