Olympus E-M5 II vs Sony A7S II

Sony A7S II advantages over Olympus E-M5 II

• Larger sensor
  35mm vs 4/3
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 8.40 vs 3.75 microns
  Better low-light and dynamic range (all else equal)
• Shoot 4K video
  4K (UHD) vs 1080p
  Make sure you have a fast computer
• In-camera panoramas
  Yes vs No
  Stitches multiple shots into a panoramic photo
• NFC
  Yes vs No
  Simplifies pairing your camera with supported phones
• 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.

  A7S II test data on DxO Mark E-M5 II test data on DxO Mark
  2,993 vs 908 iso
  Take photos in low light with less noise
• 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
• Bigger JPEG buffer
  63 vs 18 shots
  Take more JPEG shots before waiting (burst mode)
• Bigger RAW buffer
  28 vs 13 shots
  Larger buffer for RAW shots (burst mode)
• Slow-motion videos
  Yes vs No
  Shoot slow-motion videos
• Higher extended ISO
  409600 vs 25600 ISO
  Higher extended ISO can give more low-light flexibility