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Olympus E-M10 II vs Sony A5100

The Olympus OM-D E-M10 Mark II and the Sony Alpha A5100 are two digital cameras that were revealed to the public, respectively, in August 2015 and August 2014. Both the E-M10 II and the A5100 are mirrorless interchangeable lens cameras that are based on a Four Thirds (E-M10 II) and an APS-C (A5100) sensor. The Olympus has a resolution of 15.9 megapixels, whereas the Sony provides 24 MP.

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

Headline Specifications
Olympus E-M10 II
versus
Sony A5100
Olympus E-M10 II   Sony A5100
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
15.9 MP – Four Thirds sensor 24 MP – APS-C sensor
1080/60p Video 1080/60p Video
ISO 200-25,600 ISO 100-25,600
Electronic viewfinder (2360k dots) No viewfinder, LCD framing
3.0" LCD – 1040k dots 3.0" LCD – 922k dots
Tilting touchscreen Tilting touchscreen
8 shutter flaps per second 6 shutter flaps per second
In-body stabilizationLens stabilization only
320 shots per battery charge400 shots per battery charge
120 x 83 x 47 mm, 390 g 110 x 63 x 36 mm, 283 g
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Check E-M10 II offers at
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Check A5100 offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M10 Mark II and the Sony Alpha A5100? 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.

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Body comparison

The physical size and weight of the Olympus E-M10 II and the Sony A5100 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

The E-M10 II can be obtained in three different colors (black, silver, brown), while the A5100 is available in two color-versions (black, white).

Size Olympus E-M10 II vs Sony A5100
Compare E-M10 II versus A5100 top
Comparison E-M10 II or A5100 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A5100 is considerably smaller (30 percent) than the Olympus E-M10 II. Moreover, the A5100 is markedly lighter (27 percent) than the E-M10 II. In this context, it is worth noting that neither the E-M10 II nor the A5100 are weather-sealed.

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-M10 II) and the Sony E-Mount Lens Catalog (A5100). 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-M10 II gets 320 shots out of its Olympus BLS-50 battery, while the A5100 can take 400 images on a single charge of its Sony NP-FW50 power pack. The power pack in the A5100 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
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Olympus E-M10 II 120 mm 83 mm 47 mm 390 g 320 n Aug 2015 US$ 649ebay.com
2.
 
Sony A5100 110 mm 63 mm 36 mm 283 g 400 n Aug 2014 US$ 549ebay.com
3.
 
Olympus E-M10 119 mm 82 mm 46 mm 396 g 320 n Jan 2014 US$ 699ebay.com
4.
 
Olympus E-M10 III 122 mm 84 mm 50 mm 410 g 330 n Aug 2017 US$ 649ebay.com
5.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 US$ 999ebay.com
6.
 
Olympus E-PL5 111 mm 64 mm 38 mm 325 g 360 n Sep 2012 US$ 599ebay.com
7.
 
Olympus E-PL6 111 mm 64 mm 38 mm 325 g 360 n May 2013 US$ 599ebay.com
8.
 
Olympus E-PL7 115 mm 67 mm 38 mm 357 g 350 n Aug 2014 US$ 599ebay.com
9.
 
Olympus E-PL8 115 mm 67 mm 38 mm 357 g 350 n Sep 2016 US$ 549ebay.com
10.
 
Olympus E-PL9 117 mm 68 mm 39 mm 380 g 350 n Feb 2018 US$ 599ebay.com
11.
 
Olympus PEN-F 125 mm 72 mm 37 mm 427 g 330 n Jan 2016 US$ 1 199ebay.com
12.
 
Panasonic GX85 122 mm 71 mm 44 mm 426 g 290 n Apr 2016 US$ 799 amazon.com
13.
 
Sony A3000 128 mm 91 mm 85 mm 411 g 470 n Aug 2013 US$ 329ebay.com
14.
 
Sony A5000 110 mm 63 mm 36 mm 269 g 420 n Jan 2014 US$ 449ebay.com
15.
 
Sony A6000 120 mm 67 mm 45 mm 344 g 360 n Feb 2014 US$ 599ebay.com
16.
 
Sony NEX-3 117 mm 62 mm 33 mm 297 g 330 n May 2010 US$ 599ebay.com
17.
 
Sony NEX-3N 110 mm 62 mm 35 mm 269 g 480 n Feb 2013 US$ 499ebay.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 naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The A5100 was launched at a somewhat lower price (by 15 percent) than the E-M10 II, which makes it more attractive for photographers on a tight budget. 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. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Olympus E-M10 II features a Four Thirds sensor and the Sony A5100 an APS-C sensor. The sensor area in the A5100 is 63 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the E-M10 II has a native 4:3 aspect ratio, while the one in the A5100 offers a 3:2 aspect.

Olympus E-M10 II and Sony A5100 sensor measures

With 24MP, the A5100 offers a higher resolution than the E-M10 II (15.9MP), but the A5100 nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 3.76μm for the E-M10 II) due to its larger sensor. However, the E-M10 II is a somewhat more recent model (by 1 year) than the A5100, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the E-M10 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A5100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A5100 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Olympus E-M10 II 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 A5100 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Olympus OM-D E-M10 Mark II has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Sony Alpha A5100 are ISO 100 to ISO 25600 (no boost).

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-M10 II versus A5100 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 A5100 has a markedly higher DXO score than the E-M10 II (overall score 7 points higher), which will translate into better image quality. The advantage is based on 0.7 bits higher color depth, 0.2 EV in additional dynamic range, and 0.7 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-M10 II Four Thirds 15.9 4608 34561080/60p23.112.584273
2.
 
Sony A5100 APS-C 24.0 6000 40001080/60p23.812.7134780
3.
 
Olympus E-M10 Four Thirds 15.9 4608 34561080/30p22.812.388472
4.
 
Olympus E-M10 III Four Thirds 15.9 4608 34564K/30p23.112.8112074
5.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
6.
 
Olympus E-PL5 Four Thirds 15.9 4608 34561080/30p22.812.388972
7.
 
Olympus E-PL6 Four Thirds 15.9 4608 34561080/30p22.512.071768
8.
 
Olympus E-PL7 Four Thirds 15.9 4608 34561080/30p22.712.487372
9.
 
Olympus E-PL8 Four Thirds 15.9 4608 34561080/30p23.012.6103073
10.
 
Olympus E-PL9 Four Thirds 15.9 4608 34564K/30p23.112.8116274
11.
 
Olympus PEN-F Four Thirds 20.2 5184 38881080/60p23.112.489474
12.
 
Panasonic GX85 Four Thirds 15.8 4592 34484K/30p22.912.666271
13.
 
Sony A3000 APS-C 19.8 5456 36321080/60i23.712.8106878
14.
 
Sony A5000 APS-C 19.8 5456 36321080/60i23.813.0108979
15.
 
Sony A6000 APS-C 24.0 6000 40001080/60p24.113.1134782
16.
 
Sony NEX-3 APS-C 14.0 4592 3056720/30p22.112.083068
17.
 
Sony NEX-3N APS-C 16.0 4912 32641080/60i22.812.5106774
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (1080/60p).

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-M10 II has an electronic viewfinder (2360k dots), which can be very helpful when shooting in bright sunlight. In contrast, the A5100 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Olympus E-M10 II and Sony A5100 along with similar information for a selection of comparators.

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Core Features
  empty 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-M10 II2360 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
2.
 
Sony A5100none n3.0 / 922 tilting Y 1/4000s 6.0/s Y n
3.
 
Olympus E-M101440 n3.0 / 1037 tilting Y 1/4000s 8.0/s Y Y
4.
 
Olympus E-M10 III2360 n3.0 / 1040 tilting Y 1/4000s 8.6/s Y Y
5.
 
Olympus E-P5optional n3.0 / 1037 tilting Y 1/8000s 9.0/s Y Y
6.
 
Olympus E-PL5optional n3.0 / 460 tilting Y 1/4000s 8.0/s n Y
7.
 
Olympus E-PL6optional n3.0 / 460 tilting Y 1/4000s 8.0/s n Y
8.
 
Olympus E-PL7optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
9.
 
Olympus E-PL8optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
10.
 
Olympus E-PL9none n3.0 / 1040 tilting Y 1/4000s 8.6/s Y Y
11.
 
Olympus PEN-F2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
12.
 
Panasonic GX852765 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
13.
 
Sony A3000202 n3.0 / 230 fixed n 1/4000s 2.5/s Y n
14.
 
Sony A5000none n3.0 / 461 tilting n 1/4000s 3.5/s Y n
15.
 
Sony A60001440 n3.0 / 922 tilting n 1/4000s 11.0/s Y n
16.
 
Sony NEX-3optional n3.0 / 920 tilting n 1/4000s 7.0/s n n
17.
 
Sony NEX-3Noptional n3.0 / 460 tilting n 1/4000s 4.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the E-M10 II and the A5100 is in-body image stabilization (IBIS). The E-M10 II reduces the risk of handshake-induced blur with all attached lenses, while the A5100 offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The A5100 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-M10 II does not have a selfie-screen.

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 E-M10 II 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 Olympus E-M10 II has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The E-M10 II writes its imaging data to SDXC cards, while the A5100 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.

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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-M10 Mark II and Sony Alpha A5100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-M10 IIYstereo / mono--micro2.0Y--
2.
 
Sony A5100-stereo / mono--micro2.0YY-
3.
 
Olympus E-M10Ystereo / mono--micro2.0Y--
4.
 
Olympus E-M10 IIIYstereo / mono--micro2.0Y--
5.
 
Olympus E-P5Ystereo / mono--micro2.0Y--
6.
 
Olympus E-PL5Ystereo / mono--mini2.0---
7.
 
Olympus E-PL6Ystereo / mono--mini2.0---
8.
 
Olympus E-PL7Ystereo / mono--micro2.0Y--
9.
 
Olympus E-PL8Ystereo / mono--micro2.0Y--
10.
 
Olympus E-PL9Ystereo / mono--micro2.0Y-Y
11.
 
Olympus PEN-FYstereo / mono--micro2.0Y--
12.
 
Panasonic GX85Ystereo / mono--micro2.0Y--
13.
 
Sony A3000Ystereo / mono--mini2.0---
14.
 
Sony A5000-stereo / mono--micro2.0YY-
15.
 
Sony A6000Ystereo / mono--micro2.0YY-
16.
 
Sony NEX-3Ystereo / mono--mini2.0---
17.
 
Sony NEX-3N-stereo / mono--micro2.0---

It is notable that the E-M10 II has a hotshoe, while the A5100 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Both the E-M10 II and the A5100 have been discontinued, but can regularly be found used on ebay. The E-M10 II was replaced by the Olympus E-M10 III, while the A5100 does not have a direct successor. Further information on the features and operation of the E-M10 II and A5100 can be found, respectively, in the Olympus E-M10 II Manual (free pdf) or the online Sony A5100 Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Olympus E-M10 II and the Sony A5100? Which camera is better? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Olympus OM-D E-M10 Mark II:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Easier framing: Has an electronic viewfinder for image composition and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
  • Faster burst: Shoots at higher frequency (8 vs 6 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • More modern: Is somewhat more recent (announced 1 year after the A5100).

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Advantages of the Sony Alpha A5100:

  • More detail: Has more megapixels (24 vs 15.9MP), which boosts linear resolution by 25%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores markedly higher (7 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (0.7 stops ISO advantage).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • More compact: Is smaller (110x63mm vs 120x83mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 107g or 27 percent) and is thus easier to take along.
  • Longer lasting: Gets more shots (400 versus 320) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More affordable: Was released into a lower priced segment (15 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in August 2014).

If the count of relative strengths (bullet points above) is taken as a measure, the A5100 is the clear winner of the contest (13 : 9 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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-M10 II 09:13 A5100

How about other alternatives? Do the specifications of the Olympus E-M10 II and the Sony A5100 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the E-M10 II or the A5100 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 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Olympus E-M10 II4.5/5+ +..80/1005/55/5 Aug 2015 US$ 649ebay.com
2.
 
Sony A51004.5/5+....4.5/55/5 Aug 2014 US$ 549ebay.com
3.
 
Olympus E-M104/5....80/1005/55/5 Jan 2014 US$ 699ebay.com
4.
 
Olympus E-M10 III..+5/580/1004.5/54.5/5 Aug 2017 US$ 649ebay.com
5.
 
Olympus E-P55/5+ +..78/1004.5/55/5 May 2013 US$ 999ebay.com
6.
 
Olympus E-PL53/5+ +....4.5/54.5/5 Sep 2012 US$ 599ebay.com
7.
 
Olympus E-PL6............ May 2013 US$ 599ebay.com
8.
 
Olympus E-PL74/5+....5/54/5 Aug 2014 US$ 599ebay.com
9.
 
Olympus E-PL8........4.5/54/5 Sep 2016 US$ 549ebay.com
10.
 
Olympus E-PL9..+....4.5/54/5 Feb 2018 US$ 599ebay.com
11.
 
Olympus PEN-F....4/582/1004.5/55/5 Jan 2016 US$ 1 199ebay.com
12.
 
Panasonic GX854.5/5+ +..82/1005/55/5 Apr 2016 US$ 799 amazon.com
13.
 
Sony A30003/5+....4/54/5 Aug 2013 US$ 329ebay.com
14.
 
Sony A50003/5+....4.5/54.5/5 Jan 2014 US$ 449ebay.com
15.
 
Sony A60005/5+4.5/580/1004.5/55/5 Feb 2014 US$ 599ebay.com
16.
 
Sony NEX-3......70/1004.5/54/5 May 2010 US$ 599ebay.com
17.
 
Sony NEX-3N3/5......4.5/54.5/5 Feb 2013 US$ 499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods 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 use the search menu below. 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-M10 II vs Sony A5100

    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-M10 II Sony A5100
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date August 2015 August 2014
    Launch Price USD 649 USD 549
    Sensor Specs Olympus E-M10 II Sony A5100
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor APS-C Sensor
    Sensor Size 17.3 x 13.0 mm 23.5 x 15.6 mm
    Sensor Area 224.9 mm2 366.6 mm2
    Sensor Diagonal 21.6 mm 28.2 mm
    Crop Factor 2.0x 1.5x
    Sensor Resolution 15.9 Megapixels 24 Megapixels
    Image Resolution 4608 x 3456 pixels 6000 x 4000 pixels
    Pixel Pitch 3.76 μm 3.91 μm
    Pixel Density 7.08 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 1080/60p Video 1080/60p Video
    ISO Setting 200 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost 100 - 25,600 ISO no Enhancement
    Image Processor TruePic VII BIONZ X
    DXO Sensor Quality (score) 73 80
    DXO Color Depth (bits) 23.1 23.8
    DXO Dynamic Range (EV) 12.5 12.7
    DXO Low Light (ISO) 842 1347
    Screen Specs Olympus E-M10 II Sony A5100
    Viewfinder Type Electronic viewfinder no viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.62x
    Viewfinder Resolution 2360k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 922k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Olympus E-M10 II Sony A5100
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 8 shutter flaps/s 6 shutter flaps/s
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Olympus E-M10 II Sony A5100
    External Flash Hotshoe no Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI micro HDMI
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Olympus E-M10 II Sony A5100
    Battery Type Olympus BLS-50 Sony NP-FW50
    Battery Life (CIPA)320 shots per charge400 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 120 x 83 x 47 mm
    (4.7 x 3.3 x 1.9 in)
    110 x 63 x 36 mm
    (4.3 x 2.5 x 1.4 in)
    Camera Weight 390 g (13.8 oz) 283 g (10.0 oz)
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    Check A5100 offers at
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