Overall? I’d say that shooting stable handheld ENG-style video with the 5D MkII was no more difficult (and possibly even easier) than shooting with any decent handheld HD camcorder. A shoulder-mount camcorder would have given me more stable results, but at a loss of some mobility—and at a cost in weight and bulk.Though he did note some issues: the lack of auto-focus, difficulty using the LCD to monitor for anything other than eye-level viewing, and exposure issues:
Changing the aperture, whether automatically in Program or Tv modes or manually in Manual or Av modes, causes the video to stutter, repeating three frames or so at the time the change occurStill, he'd do it again.
Would I do it again?
Well, yes, actually, I would. In fact, I was pleasantly surprised at how well the 5D MkII worked as a run’n’gun / docco / ENG camera.
Adam Wilt: …Winding down from NAB