Canon 5D Mark III vs Olympus E-M1

Canon 5D Mark III advantages over Olympus E-M1

• Larger sensor
  35mm vs 4/3
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 6.25 vs 3.75 microns
  Better low-light and dynamic range (all else equal)
• Fast startup
  ~0.50 vs 0.8 sec
  Faster startup lets you catch the moment
• Higher effective ISO

  Higher effective ISO

  Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

  Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

  You can learn more at our glossary entry.

  Maximum effective ISO test data courtesy of DxO Mark.

  5D Mark III test data on DxO Mark E-M1 test data on DxO Mark
  2,293 vs 757 iso
  Take photos in low light with less noise
• 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

  950 vs 350 shots
  Capture more photos
• Top deck display
  Yes vs No
  Check settings with a screen on top of the camera
• Shoots 24p video
  Yes vs No
  Gives your movies a big-screen feel
• More pixels
  22.3 vs 16.1 megapixels
  Higher resolution photos
• Shoots 60p video
  Yes vs No
  A faster framerate can give you more editing options
• Dual card slots
  Yes vs No
  Gives you more storage flexibility
• Headphone jack
  Yes vs No
  Monitor audio recording while you shoot video
• Has anti-aliasing filter
  Filter vs No Filter
  Reduces unsightly moiré in photos
• Higher extended ISO
  102400 vs 25600 ISO
  Higher extended ISO can give more low-light flexibility