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Olympus E-M5 vs Sony A99 II

The Olympus OM-D E-M5 and the Sony Alpha ALT-A99 II are two digital cameras that were announced, respectively, in February 2012 and September 2016. The E-M5 is a mirrorless interchangeable lens camera, while the A99 II is a DSLR. The cameras are based on a Four Thirds (E-M5) and a full frame (A99 II) sensor. The Olympus has a resolution of 15.9 megapixels, whereas the Sony provides 42.2 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 A99 II
Olympus E-M5   Sony A99 II
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Sony A mount lenses
15.9 MP, Four Thirds Sensor 42.2 MP, Full Frame Sensor
1080/60i Video 4K/30p Video
ISO 200-25,600 ISO 100-25,600
Electronic viewfinder (1440k dots) Electronic viewfinder (2400k dots)
3.0 LCD, 610k dots 3.0 LCD, 1229k dots
Tilting touchscreen Fully flexible screen (no touchscreen)
9 shutter flaps per second 12 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
360 shots per battery charge490 shots per battery charge
122 x 89 x 43 mm, 425 g 143 x 104 x 76 mm, 849 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M5 and the Sony Alpha ALT-A99 II? 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 A99 II are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. 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 A99 II is only available in black.

Size Olympus E-M5 vs Sony A99 II
Compare E-M5 versus A99 II top
Comparison E-M5 or A99 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 II is notably larger (37 percent) than the Olympus E-M5. Moreover, the A99 II is substantially heavier (100 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the E-M5 gets 360 shots out of its BLN-1 battery, while the A99 II can take 490 images on a single charge of its NP-FM500H power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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 1,299 i
2.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i
3.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
4.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 i
5.
 
Olympus PEN-F 125 mm 72 mm 37 mm 427 g 330 n Jan 2016 1,199 i
6.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099 i
7.
 
Olympus E-PL7 115 mm 67 mm 38 mm 357 g 350 n Aug 2014 599 i
8.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399 i
9.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999 i
10.
 
Olympus E-PL5 111 mm 64 mm 38 mm 325 g 360 n Sep 2012 599 i
11.
 
Olympus E-PM2 110 mm 64 mm 34 mm 269 g 360 n Sep 2012 499 i
12.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199 i
13.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999 i
14.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299 i
15.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199 i
16.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999 i
17.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799 i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

The price is, of course, an important factor in any camera decision. 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 59 percent) than the A99 II, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 A99 II a full frame sensor. The sensor area in the A99 II is 283 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 A99 II offers a 3:2 aspect.

Olympus E-M5 and Sony A99 II sensor measures

With 42.2MP, the A99 II offers a higher resolution than the E-M5 (15.9MP), but the A99 II nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.76μm for the E-M5) due to its larger sensor. Moreover, the A99 II is a much more recent model (by 4 years and 7 months) 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. Coming back to sensor resolution, it should be mentioned that the A99 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A99 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Olympus E-M5 are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.

The A99 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

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 ALT-A99 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.

E-M5 versus A99 II 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 A99 II offers substantially better image quality than the E-M5 (overall score 21 points higher). The advantage is based on 2.6 bits higher color depth, 1.1 EV in additional dynamic range, and 1.5 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-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 34561080/60i22.812.3826 71
2.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.42317 92
3.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.42308 86
4.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660 100
5.
 
Olympus PEN-F Four Thirds 20.2 5184 38881080/60p23.112.4894 74
6.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.5842 73
7.
 
Olympus E-PL7 Four Thirds 15.9 4608 34561080/30p22.712.4873 72
8.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.7757 73
9.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.4895 72
10.
 
Olympus E-PL5 Four Thirds 15.9 4608 34561080/30p22.812.3889 72
11.
 
Olympus E-PM2 Four Thirds 15.9 4608 34561080/30p22.712.2932 72
12.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.6806 75
13.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.2718 70
14.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.4812 71
15.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.93434 98
16.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.32993 85
17.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.01555 89

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A99 II provides a better video resolution than the E-M5. It can shoot movie footage at 4K/30p, while the Olympus is limited to 1080/60i.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A99 II 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 A99 II, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Olympus E-M51440 n 3.0 610 tilting Y 1/4000s 9.0 n Y
2.
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
3.
 
Canon 5DS Roptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
4.
 
Nikon D850optical Y 3.2 2359 tilting Y 1/8000s 9.0 n n
5.
 
Olympus PEN-F2360 n 3.0 1037 swivel Y 1/8000s 10.0 n Y
6.
 
Olympus E-M5 II2360 n 3.0 1037 swivel Y 1/8000s 10.0 n Y
7.
 
Olympus E-PL7optional n 3.0 1037 tilting Y 1/4000s 8.0 n Y
8.
 
Olympus E-M12360 n 3.0 1037 tilting Y 1/8000s 10.0 n Y
9.
 
Olympus E-P5optional n 3.0 1037 tilting Y 1/8000s 9.0 Y Y
10.
 
Olympus E-PL5optional n 3.0 460 tilting Y 1/4000s 8.0 n Y
11.
 
Olympus E-PM2optional n 3.0 460 fixed Y 1/4000s 8.0 n Y
12.
 
Panasonic GX82360 n 3.0 1040 swivel Y 1/8000s 10.0 n Y
13.
 
Panasonic GX72760 n 3.0 1040 tilting Y 1/8000s 5.0 Y Y
14.
 
Panasonic GH31746 n 3.0 614 swivel Y 1/4000s 6.0 Y n
15.
 
Sony A7R II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
16.
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
17.
 
Sony A992359 Y 3.0 1229 full-flex n 1/8000s 6.0 n Y

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-M5 has a touchscreen, while the A99 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The A99 II has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the E-M5 does not have a selfie-screen.

The E-M5 writes its imaging data to SDXC cards, while the A99 II uses SDXC or Memory Stick PRO Duo cards. The A99 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the E-M5 only has one slot. 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 ALT-A99 II 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
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-M5Ystereomono--mini2.0---
2.
 
Sony A99 IIYstereomonoYYmicro2.0YYY
3.
 
Canon 5DS RYmonomonoY-mini3.0---
4.
 
Nikon D850YstereomonoYYmini3.0YYY
5.
 
Olympus PEN-FYstereomono--micro2.0Y--
6.
 
Olympus E-M5 IIYstereomonoY-micro2.0Y--
7.
 
Olympus E-PL7Ystereomono--micro2.0Y--
8.
 
Olympus E-M1YstereomonoY-micro2.0Y--
9.
 
Olympus E-P5Ystereomono--micro2.0Y--
10.
 
Olympus E-PL5Ystereomono--mini2.0---
11.
 
Olympus E-PM2Ystereomono--mini2.0---
12.
 
Panasonic GX8YstereomonoY-micro2.0YY-
13.
 
Panasonic GX7Ystereomono--mini2.0YY-
14.
 
Panasonic GH3YstereomonoYYmini2.0Y--
15.
 
Sony A7R IIYstereomonoYYmicro2.0YY-
16.
 
Sony A7S IIYstereomonoYYmicro2.0YY-
17.
 
Sony A99YstereomonoYYmini2.0---

It is notable that the A99 II 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.

Studio photographers will appreciate that the Sony A99 II (unlike the E-M5) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The A99 II is a recent model that features in the current product line-up of Sony. In contrast, the E-M5 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the E-M5 was succeeded by the Olympus E-M5 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 conclusions can be drawn? Is there a clear favorite between the Olympus E-M5 and the Sony A99 II? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More compact: Is smaller (122x89mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 424g or 50 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More affordable: Was introduced into a lower priced category (59 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 ALT-A99 II:

  • More detail: Has more megapixels (42.2 vs 15.9MP), which boosts linear resolution by 66%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (21 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.6 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.1 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.5 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • 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 (0.78x vs 0.58x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 610k dots).
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 9 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (490 versus 360) out of a single battery charge.
  • 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.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More modern: Reflects 4 years and 7 months of technical progress since the E-M5 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A99 II is the clear winner of the contest (25 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-M5 07:25 A99 II

How about other alternatives? Do the specifications of the Olympus E-M5 and the Sony A99 II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the E-M5 or the A99 II perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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 
 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 1,299 i
2.
 
Sony A99 II....85/1004.5/54.5/5 Sep 2016 3,199 i
3.
 
Canon 5DS R5/5+83/1005/54.5/5 Feb 2015 3,699 i
4.
 
Nikon D8504.5/5+ +89/1004.5/55/5 Jul 2017 3,299 i
5.
 
Olympus PEN-F....82/1004.5/55/5 Jan 2016 1,199 i
6.
 
Olympus E-M5 II5/5+ +81/1005/55/5 Feb 2015 1,099 i
7.
 
Olympus E-PL74/5+..5/54/5 Aug 2014 599 i
8.
 
Olympus E-M15/5+ +84/1004.5/54.5/5 Sep 2013 1,399 i
9.
 
Olympus E-P55/5+ +78/1004.5/55/5 May 2013 999 i
10.
 
Olympus E-PL53/5+ +..4.5/54.5/5 Sep 2012 599 i
11.
 
Olympus E-PM23/5..77/1005/54.5/5 Sep 2012 499 i
12.
 
Panasonic GX85/5+82/1004.5/54.5/5 Jul 2015 1,199 i
13.
 
Panasonic GX74/5+79/1005/55/5 Aug 2013 999 i
14.
 
Panasonic GH35/5+ +79/1004.5/54.5/5 Sep 2012 1,299 i
15.
 
Sony A7R II5/5+ +90/1005/55/5 Jun 2015 3,199 i
16.
 
Sony A7S II5/5+..4.5/55/5 Sep 2015 2,999 i
17.
 
Sony A995/5..84/1004.5/54.5/5 Sep 2012 2,799 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Olympus E-M5:
Check Ebay offers
Sony A99 II:
Check Amazon price

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Olympus E-M5 vs Sony A99 II

    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 A99 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Sony A mount lenses
    Launch Date February 2012 September 2016
    Launch Price USD 1,299 USD 3,199
    Sensor Specs Olympus E-M5 Sony A99 II
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.9 x 24.0 mm
    Sensor Area 224.9 mm2 861.6 mm2
    Sensor Diagonal 21.6 mm 43.2 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.9 Megapixels 42.2 Megapixels
    Image Resolution 4608 x 3456 pixels 7952 x 5304 pixels
    Pixel Pitch 3.76 μm 4.52 μm
    Pixel Density 7.08 MP/cm2 4.90 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60i Video 4K/30p Video
    ISO Setting 200 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost no Enhancement 50 - 25,600 ISO
    Image Processor TruePic VI BIONZ X
    DXO Sensor Quality (score) 71 92
    DXO Color Depth (bits) 22.8 25.4
    DXO Dynamic Range (EV) 12.3 13.4
    DXO Low Light (ISO) 826 2317
    Screen Specs Olympus E-M5 Sony A99 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.58x 0.78x
    Viewfinder Resolution 1440k dots 2400k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 610k dots 1229k dots
    LCD Attachment Tilting screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Olympus E-M5 Sony A99 II
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 9 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy100 000 actuations300 000 actuations
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Olympus E-M5 Sony A99 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    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
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Olympus E-M5 Sony A99 II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type BLN-1 NP-FM500H
    Battery Life (CIPA)360 shots per charge490 shots per charge
    Body Dimensions 122 x 89 x 43 mm
    (4.8 x 3.5 x 1.7 in)
    143 x 104 x 76 mm
    (5.6 x 4.1 x 3.0 in)
    Camera Weight 425 g (15.0 oz) 849 g (29.9 oz)

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