Panasonic GM5 vs Canon 1DX Mark III

Canon 1DX Mark III advantages over Panasonic GM5

• Larger sensor
  35mm vs 4/3
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 6.58 vs 3.77 microns
  Better low-light and dynamic range (all else equal)
• Shoot 4K video
  No vs 1080p
  Make sure you have a fast computer
• 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 220 shots
  Capture more photos
• Top deck display
  Yes vs No
  Check settings with a screen on top of the camera
• External Mic Jack
  Jack vs No jack
  Improved sound fidelity when shooting video
• Higher max flash sync
  1/250 vs 1/50 sec
  Reduce the effect of ambient light in flash shots
• Newer
  5 years vs 10 years old
  Newer cameras often support more advanced features
• More dots on screen
  2100k vs 922k dots
  Can mean greater resolution or a brighter screen
• More viewfinder magnification
  0.76x vs 0.46x
  Get a bigger view of the scene through the eye-level viewfinder
• More pixels
  20.1 vs 16.0 megapixels
  Higher resolution photos
• Dual card slots
  Yes vs No
  Gives you more storage flexibility
• Headphone jack
  Yes vs No
  Monitor audio recording while you shoot video
• Faster JPEG shooting
  20.0 fps vs 5.7 fps
  Faster JPEG shooting (burst mode)
• Bigger JPEG buffer
  Unlimited vs 56 shots
  Take more JPEG shots before waiting (burst mode)
• Faster RAW shooting
  20.0 fps vs 4.9 fps
  Faster RAW shooting in burst mode
• Bigger RAW buffer
  Unlimited vs 7 shots
  Larger buffer for RAW shots (burst mode)
• Slow-motion videos
  Yes vs No
  Shoot slow-motion videos
• Higher extended ISO
  819200 vs 25600 ISO
  Higher extended ISO can give more low-light flexibility