The Mark III's video mode was a slight refinement on the Mark II (and not much of a leap), but with advancements in technology over the last few years, it should theoretically be possible to put 4K video into a Mark IV. We've seen a few rumors so far regarding the camera, and while they vary slightly on specs, one thing they do have in common is 4K video.

First here is Canon Watch with some of the early rumored specs of the new camera that were reported on about a month ago:

  • 24MP sensor
  • Dual Pixel CMOS AF III
  • New and more advanced AF system (compared to EOS 5D3)
  • 4k video
  • Anti-flickr technology (seen first on the 7D Mark II)
  • Improved video features
  • Crop mode (featured on the upcoming EOS 5Ds)
  • ISO 100-51200 (H1: 102400, H2: 204800

And here are the newest rumored specs from Northlight Images (which Canon Watch has given a 50% rating):

  • 28MP Sensor
  • 9fps
  • 4K Video
  • August/September 2015 Release

Looking in from the outside these both seem plausible, but with the 50MP 5Ds and 5Dr models, it's not really all that necessary for Canon to keep raising the pixel count. Above 20 is plenty for most people, and there are negative consequences (for both video and stills) that come from trying to squeeze too many pixels onto the same size sensor.

Either way it looks like we may actually get 4K in an affordable full-frame Canon camera. Until we get closer these are just rumors, but Canon has been sitting on mounds of cash and I'm sure they've spent a bit on R&D at this point. The 1D C is currently the only Canon camera that can shoot 4K internally, and while that will probably change at NAB with new 4K EOS cinema cameras, that doesn't mean the vast majority of people will be able to afford them — and there are also many advantages to having a small 4K camera that can do both stills and video. Even if you don't plan on utilizing 4K for 4K, there are other benefits to shooting higher resolution, like stabilization and cropping in for multiple angles during an interview.

What would you like to see in Canon's next 5D?

Source: Canon Watch