Olympus OM-D E-M1X vs Sony Alpha A7S II Compare

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Cameras which are being compared are Mirrorless cameras.

OM-D E-M1X vs Alpha A7S II - Side by side

Learn more about compared cameras specifications below.

Olympus OM-D E-M1X vs Sony Alpha A7S II Specs

OM-D E-M1X

  • Introduced in January 2019
  • Mirrorless
  • Sensor: Four Thirds
  • 20 megapixel
  • 18 frames/second
  • 64 - 25600 ISO
  • 4096 x 2160 Video
  • Viewfinder: Elektronic
  • 76.00mm (3.0") Monitor, articulated
  • Lens mount Micro Four Thirds (MFT)
  • WiFi built-in
  • 144.4 x 156.8 x 75.4mm³ (5.7" x 6.2" x 3.0")
  • 997g (32.2 oz.)

All specs: Main page for OM-D E-M1X

Alpha A7S II

  • Introduced in September 2015
  • Mirrorless
  • Sensor: Full frame
  • 12 megapixel
  • 5 frames/second
  • 50 - 409600 ISO
  • 3840 x 2160 Video
  • Viewfinder: Elektronic
  • 76.00mm (3.0") Monitor, articulated
  • Lens mount E Mount
  • WiFi built-in
  • 126.9 x 95.7 x 60.3mm³ (5.0" x 3.8" x 2.4")
  • 627g (20.2 oz.)

All specs: Main page for Alpha A7S II

OM-D E-M1X vs Alpha A7S II Sensors

On the pictures below the sensor areas of cameras are highlighted.

This infographic highlights the sensor areas of both models compared to other common sensor formats:

Infographic: OM-D E-M1X and Alpha A7S II sensor area comparisonAdvantage: Sony Alpha A7S II

OM-D E-M1X vs Alpha A7S II: Viewfinder

OM-D E-M1X has an electronic viewfinder and it's resolution is 2.36 megapixel with magnification of 0.83x.

Alpha A7S II has an electronic viewfinder with resolution 2.36 megapixel, it's magnification is 0.78x.

Viewfinder magnifications of compared cameras. The black area shows a magnification of 1x, relative to native size; in red is a magnification of 0.85x.

OM-D E-M1X (0.83x)

Alpha A7S II (0.78x)

Simulated viewfinder of the OM-D E-M1XSimulated viewfinder of the Alpha A7S II

Note: Differences in the image area are the result of different image ratios, 3:2 or 4:3. That can make it difficult to compare the viewfinder magnification of both cameras.

Olympus OM-D E-M1X VS Sony Alpha A7S II Other Specs Comparison

Why is Olympus OM-D E-M1X a better choice

OM-D E-M1X

Alpha A7S II

Wider resolution (5, megapixel)20.4012.20
Higher speed (4, frames/second)185
Larger lens selection (3)8050
Touch screen (2)
Better Video (2)4096 x 21603840 x 2160
Longer battery life (3, photos)870370
USB 3.0 (2)
GPS (2)
Environmental sealing (2)

Conclusion: Advantages of the OM-D E-M1X are the higher resolution, that the camera is faster and the larger selection of lenses. We also like the rather comfortable touch screen, the superior video recording and that the battery has more stamina. Another advantage over the Alpha A7S II: the support for USB 3.0. HArdly a luxury, given today's image size and the requirements of 4K video, the built-in GPS.

The OM-D E-M1X scores 23 points.

Otherwise why to choose Sony Alpha A7S II

OM-D E-M1X

Alpha A7S II

Larger sensor (5)Four ThirdsFull frame
Auto Focus points (4)121169
Better sensibility (4)64 - 25600 ISO50 - 409600 ISO
Better monitor (2, Megapixel)1.041.29
Weighs less (2)997g
(32.2 oz.)
627g
(20.2 oz.)
More portable (2)1707cm³
(108 cu.in.)
732cm³
(46 cu.in.)

Conclusion: Advantages of the Alpha A7S II are the larger sensor, the faster and more accurate auto focus and the larger sensitivity. We also like that the display has a higher resolution, the lower weight than the OM-D E-M1X and the more compact size.

Yields 19 points for the Alpha A7S II.

Common Specs for both cameras compared

OM-D E-M1X

Alpha A7S II

Sensor cleaning
Image stabilizer
Articulated screen
External microphone
WiFi
Olympus OM-D E-M1X VS Sony Alpha A7S II Dimensions

Look at front view of the OM-D E-M1X and Alpha A7S II

OM-D E-M1X und Alpha A7S II, front viewOM-D E-M1X und Alpha A7S II, front view

Top view of cameras

OM-D E-M1X und Alpha A7S II, view from aboveOM-D E-M1X und Alpha A7S II, view from above

Total scores

Here's the total score according to comparison above:

Olympus OM-D E-M1X

Sony Alpha A7S II

23
19

We advise to choose the newest model: Olympus OM-D E-M1X.

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