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

Here you can find digital cameras comparison. Pick up with the best rating.

Cameras which are being compared are Mirrorless cameras.

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

Learn more about compared cameras specifications below.

Olympus OM-D E-M1X vs Sony Alpha A7S 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

  • Introduced in June 2014
  • 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 94.4 x 48.2mm³ (5.0" x 3.7" x 1.9")
  • 489g (15.8 oz.)

All specs: Main page for Alpha A7S

OM-D E-M1X vs Alpha A7S 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 sensor area comparisonAdvantage: Sony Alpha A7S

OM-D E-M1X vs Alpha A7S: Viewfinder

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

Alpha A7S has an electronic viewfinder with resolution 2.36 megapixel, it's magnification is 0.71x.

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 (0.71x)

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

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. However, with these two cameras the difference is considerable in any case.

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

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

OM-D E-M1X

Alpha A7S

Wider resolution (5, megapixel)20.4012.20
Higher speed (4, frames/second)185
Auto Focus points (4)12125
Larger lens selection (3)8050
Image stabilizer (3)
Better monitor (2, Megapixel)1.040.92
Touch screen (2)
Better Video (2)4096 x 21603840 x 2160
Longer battery life (3, photos)870380
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 faster and more accurate auto focus. Additional pros for the Olympus are the larger selection of lenses, the optical image stabilizer and that the display has a higher resolution. A nice touch is the rather comfortable touch screen, the superior video recording and that the battery has more stamina. Another advantage over the Alpha A7S: 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 32 points.

Otherwise why to choose Sony Alpha A7S

OM-D E-M1X

Alpha A7S

Larger sensor (5)Four ThirdsFull frame
Better sensibility (4)64 - 25600 ISO50 - 409600 ISO
Weighs less (2)997g
(32.2 oz.)
489g
(15.8 oz.)
More portable (2)1707cm³
(108 cu.in.)
577cm³
(36 cu.in.)

Conclusion: Advantages of the Alpha A7S are the larger sensor, the larger sensitivity and the lower weight than the OM-D E-M1X. Another advantage over the OM-D E-M1X: the more compact size.

Yields 13 points for the Alpha A7S.

Common Specs for both cameras compared

OM-D E-M1X

Alpha A7S

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

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

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

Top view of cameras

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

Total scores

Here's the total score according to comparison above:

Olympus OM-D E-M1X

Sony Alpha A7S

32
13

We recommend Olympus OM-D E-M1X as better choice.

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