Canon 1D Mark IV vs Canon 1DX Mark III

Canon 1DX Mark III advantages over Canon 1D Mark IV

• Larger sensor
  35mm vs APS-H
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 6.58 vs 5.70 microns
  Better low-light and dynamic range (all else equal)
• Shoot 4K video
  No vs 1080p
  Make sure you have a fast computer
• Touchscreen
  Touch vs No touch
  Interact with your camera just like your smartphone
• Built-in Wi-Fi
  Wi-Fi vs None
  Share your photos wirelessly
• Built-in Bluetooth
  Yes vs No
  Always-on wireless connectivity
• Built-in GPS
  GPS vs None
  Geotag your photos
• On-sensor phase detect
  Yes vs No
  Usually improves live view and video AF performance
• Longer stills battery life
  More info

  Longer stills battery life

  Cameras with longer battery life can take more photos before exhausting their batteries.

  Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

  2850 vs 1500 shots
  Capture more photos
• More cross-type AF points
  155 vs 39
  Cross-type AF points improve autofocus performance
• Newer
  4 years vs 14 years old
  Newer cameras often support more advanced features
• Shoots 24p video
  Yes vs No
  Gives your movies a big-screen feel
• More dots on screen
  2100k vs 920k dots
  Can mean greater resolution or a brighter screen
• More viewfinder magnification
  0.76x vs 0.58x
  Get a bigger view of the scene through the eye-level viewfinder
• More pixels
  20.1 vs 16.1 megapixels
  Higher resolution photos
• Shoots 60p video
  Yes vs No
  A faster framerate can give you more editing options
• More AF points
  191 vs 45
  More AF points improve autofocus
• Headphone jack
  Yes vs No
  Monitor audio recording while you shoot video
• Faster JPEG shooting
  20.0 fps vs 9.9 fps
  Faster JPEG shooting (burst mode)
• Bigger JPEG buffer
  Unlimited vs 46 shots
  Take more JPEG shots before waiting (burst mode)
• Slow-motion videos
  Yes vs No
  Shoot slow-motion videos
• Higher extended ISO
  819200 vs 102400 ISO
  Higher extended ISO can give more low-light flexibility