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Olympus E-M5 vs Sony A7S

The Olympus OM-D E-M5 and the Sony Alpha A7S are two digital cameras that were announced, respectively, in February 2012 and April 2014. Both the E-M5 and the A7S are mirrorless interchangeable lens cameras that are based on a Four Thirds (E-M5) and a full frame (A7S) sensor. The Olympus has a resolution of 15.9 megapixels, whereas the Sony provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Olympus E-M5
versus
Sony A7S
Olympus E-M5   Sony A7S
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
15.9 MP – Four Thirds sensor 12 MP – Full Frame sensor
1080/60i Video 1080/60p Video
ISO 200-25,600 ISO 100-102,400 (50 - 409,600)
Electronic viewfinder (1440k dots) Electronic viewfinder (2400k dots)
3.0" LCD – 610k dots 3.0" LCD – 921k dots
Tilting touchscreen Tilting screen (no touchscreen)
9 shutter flaps per second 5 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
360 shots per battery charge380 shots per battery charge
122 x 89 x 43 mm, 425 g 127 x 94 x 48 mm, 489 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M5 and the Sony Alpha A7S? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

The physical size and weight of the Olympus E-M5 and the Sony A7S are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

The E-M5 can be obtained in two different colors (black, silver), while the A7S is only available in black.

Size Olympus E-M5 vs Sony A7S
Compare E-M5 versus A7S top
Comparison E-M5 or A7S rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S is notably larger (10 percent) than the Olympus E-M5. Moreover, the A7S is markedly heavier (15 percent) than the E-M5. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (E-M5) and the Sony FE Lens Catalog (A7S). Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the E-M5 gets 360 shots out of its BLN-1 battery, while the A7S can take 380 images on a single charge of its NP-FW50 power pack. The power pack in the A7S can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-M5 122 mm 89 mm 43 mm 425 g 360 Y Feb 2012 1,299ebay.com
2.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 2,499ebay.com
3.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749ebay.com
4.
 
Olympus PEN-F 125 mm 72 mm 37 mm 427 g 330 n Jan 2016 1,199ebay.com
5.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099ebay.com
6.
 
Olympus E-PL7 115 mm 67 mm 38 mm 357 g 350 n Aug 2014 599ebay.com
7.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
8.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999ebay.com
9.
 
Olympus E-PL5 111 mm 64 mm 38 mm 325 g 360 n Sep 2012 599ebay.com
10.
 
Olympus E-PM2 110 mm 64 mm 34 mm 269 g 360 n Sep 2012 499ebay.com
11.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
12.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
13.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299ebay.com
14.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
15.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
16.
 
Sony A7 127 mm 94 mm 48 mm 474 g 340 Y Oct 2013 1,699ebay.com
17.
 
Sony A7R 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 2,299ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The E-M5 was launched at a markedly lower price (by 48 percent) than the A7S, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Olympus E-M5 features a Four Thirds sensor and the Sony A7S a full frame sensor. The sensor area in the A7S is 280 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the E-M5 has a native 4:3 aspect ratio, while the one in the A7S offers a 3:2 aspect.

Olympus E-M5 and Sony A7S sensor measures

Despite having a smaller sensor, the Olympus E-M5 offers a higher resolution of 15.9 megapixels, compared with 12 MP of the Sony A7S. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 8.45μm for the A7S). Moreover, it should be noted that the A7S is much more recent (by 2 years and 1 month) than the E-M5, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Olympus E-M5 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M5 for good quality output (200 dots per inch) amounts to 23 x 17.3 inches or 58.5 x 43.9 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.8 x 35.1 cm, and for excellent quality (300 dpi) 15.4 x 11.5 inches or 39 x 29.3 cm. The corresponding values for the Sony A7S are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.

The Olympus OM-D E-M5 has a native sensitivity range from ISO 200 to ISO 25600. The corresponding ISO settings for the Sony Alpha A7S are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

E-M5 versus A7S MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the A7S offers substantially better image quality than the E-M5 (overall score 16 points higher). The advantage is based on 1.1 bits higher color depth, 0.9 EV in additional dynamic range, and 2.2 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-M5 Four Thirds 15.9 4608 34561080/60i22.812.382671
2.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
3.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
4.
 
Olympus PEN-F Four Thirds 20.2 5184 38881080/60p23.112.489474
5.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
6.
 
Olympus E-PL7 Four Thirds 15.9 4608 34561080/30p22.712.487372
7.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
8.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
9.
 
Olympus E-PL5 Four Thirds 15.9 4608 34561080/30p22.812.388972
10.
 
Olympus E-PM2 Four Thirds 15.9 4608 34561080/30p22.712.293272
11.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
12.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
13.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271
14.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
15.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
16.
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
17.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A7S provides a faster frame rate than the E-M5. It can shoot movie footage at 1080/60p, while the Olympus is limited to 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7S offers a substantially higher resolution than the one in the E-M5 (2400k vs 1440k dots). The following table reports on some other key feature differences and similarities of the Olympus E-M5, the Sony A7S, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Olympus E-M51440 n3.0 / 610 tilting Y 1/4000s 9.0/s n Y
2.
 
Sony A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
3.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5/s n n
4.
 
Olympus PEN-F2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
5.
 
Olympus E-M5 II2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
6.
 
Olympus E-PL7optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
7.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
8.
 
Olympus E-P5optional n3.0 / 1037 tilting Y 1/8000s 9.0/s Y Y
9.
 
Olympus E-PL5optional n3.0 / 460 tilting Y 1/4000s 8.0/s n Y
10.
 
Olympus E-PM2optional n3.0 / 460 fixed Y 1/4000s 8.0/s n Y
11.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
12.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
13.
 
Panasonic GH31746 n3.0 / 614 swivel Y 1/4000s 6.0/s Y n
14.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
16.
 
Sony A72400 n3.0 / 1230 tilting n 1/8000s 5.0/s n n
17.
 
Sony A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the E-M5 and the A7S is in-body image stabilization (IBIS). The E-M5 reduces the risk of handshake-induced blur with all attached lenses, while the A7S offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7S is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The E-M5 writes its imaging data to SDXC cards, while the A7S uses SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Olympus OM-D E-M5 and Sony Alpha A7S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-M5Ystereo / mono--mini2.0---
2.
 
Sony A7SYstereo / monoYYmicro2.0YY-
3.
 
Nikon DfY- / ---mini2.0---
4.
 
Olympus PEN-FYstereo / mono--micro2.0Y--
5.
 
Olympus E-M5 IIYstereo / monoY-micro2.0Y--
6.
 
Olympus E-PL7Ystereo / mono--micro2.0Y--
7.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
8.
 
Olympus E-P5Ystereo / mono--micro2.0Y--
9.
 
Olympus E-PL5Ystereo / mono--mini2.0---
10.
 
Olympus E-PM2Ystereo / mono--mini2.0---
11.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
12.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
13.
 
Panasonic GH3Ystereo / monoYYmini2.0Y--
14.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
16.
 
Sony A7Ystereo / monoYYmicro2.0YY-
17.
 
Sony A7RYstereo / monoYYmicro2.0YY-

It is notable that the A7S offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the E-M5 does not provide wifi capability.

Both the E-M5 and the A7S have been discontinued, but can regularly be found used on ebay. The E-M5 was replaced by the Olympus E-M5 II, while the A7S was followed by the Sony A7S II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Sony websites.

Review summary

So what is the bottom line? Is there a clear favorite between the Olympus E-M5 and the Sony A7S? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Olympus OM-D E-M5:

  • More detail: Offers more megapixels (15.9 vs 12MP) with a 13% higher linear resolution.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (9 vs 5 flaps/sec) to capture the decisive moment.
  • Less heavy: Is lighter (by 64g or 13 percent) and hence easier to carry around.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • More affordable: Was introduced into a lower priced category (48 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2012).

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Arguments in favor of the Sony Alpha A7S:

  • Better image quality: Scores substantially higher (16 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (0.9 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.2 stops ISO advantage).
  • Better video: Provides higher movie framerates (1080/60p versus 1080/60i).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (2400k vs 1440k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.71x vs 0.58x).
  • More detailed LCD: Has a higher resolution rear screen (921k vs 610k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More modern: Reflects 2 years and 1 month of technical progress since the E-M5 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A7S is the clear winner of the contest (16 : 7 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-M5 07:16 A7S

How about other alternatives? Do the specifications of the Olympus E-M5 and the Sony A7S place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it says little about, for example, the shooting experience and imaging performance of the E-M5 and the A7S in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-M54/5+ +..80/1004.5/55/5 Feb 2012 1,299ebay.com
2.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 2,499ebay.com
3.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 2,749ebay.com
4.
 
Olympus PEN-F....4/582/1004.5/55/5 Jan 2016 1,199ebay.com
5.
 
Olympus E-M5 II5/5+ +4.5/581/1005/55/5 Feb 2015 1,099ebay.com
6.
 
Olympus E-PL74/5+....5/54/5 Aug 2014 599ebay.com
7.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
8.
 
Olympus E-P55/5+ +..78/1004.5/55/5 May 2013 999ebay.com
9.
 
Olympus E-PL53/5+ +....4.5/54.5/5 Sep 2012 599ebay.com
10.
 
Olympus E-PM23/5....77/1005/54.5/5 Sep 2012 499ebay.com
11.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
12.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
13.
 
Panasonic GH35/5+ +..79/1004.5/54.5/5 Sep 2012 1,299ebay.com
14.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
15.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
16.
 
Sony A75/5+ +..80/1005/55/5 Oct 2013 1,699ebay.com
17.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 2,299ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Olympus E-M5 vs Sony A7S

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Olympus E-M5 Sony A7S
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date February 2012 April 2014
    Launch Price USD 1,299 USD 2,499
    Sensor Specs Olympus E-M5 Sony A7S
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.8 x 23.9 mm
    Sensor Area 224.9 mm2 855.62 mm2
    Sensor Diagonal 21.6 mm 43 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.9 Megapixels 12 Megapixels
    Image Resolution 4608 x 3456 pixels 4240 x 2832 pixels
    Pixel Pitch 3.76 μm 8.45 μm
    Pixel Density 7.08 MP/cm2 1.40 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60i Video 1080/60p Video
    ISO Setting 200 - 25,600 ISO 100 - 102,400 ISO
    ISO Boost no Enhancement 50 - 409,600 ISO
    Image Processor TruePic VI BIONZ X
    DXO Sensor Quality (score) 71 87
    DXO Color Depth (bits) 22.8 23.9
    DXO Dynamic Range (EV) 12.3 13.2
    DXO Low Light (ISO) 826 3702
    Screen Specs Olympus E-M5 Sony A7S
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.58x 0.71x
    Viewfinder Resolution 1440k dots 2400k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 610k dots 921k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Olympus E-M5 Sony A7S
    Focus System Contrast-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 9 shutter flaps/s 5 shutter flaps/s
    Electronic Shutterno E-ShutterYES
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Olympus E-M5 Sony A7S
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Olympus E-M5 Sony A7S
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type BLN-1 NP-FW50
    Battery Life (CIPA)360 shots per charge380 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 122 x 89 x 43 mm
    (4.8 x 3.5 x 1.7 in)
    127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 425 g (15.0 oz) 489 g (17.2 oz)
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