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Nikon D3100 vs Olympus E-M1

The Nikon D3100 and the Olympus OM-D E-M1 are two digital cameras that were officially introduced, respectively, in August 2010 and September 2013. The D3100 is a DSLR, while the E-M1 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D3100) and a Four Thirds (E-M1) sensor. The Nikon has a resolution of 14.2 megapixels, whereas the Olympus provides 15.9 MP.

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

Headline Specifications
Nikon D3100 versus Olympus E-M1
Nikon D3100 Olympus E-M1
Digital single lens reflex Mirrorless system camera
Nikon F mount lenses Micro Four Thirds lenses
14.2 MP, APS-C Sensor 15.9 MP, Four Thirds Sensor
1080/24p Video 1080/30p Video
ISO 100-3,200 (100 - 12,800) ISO 200-25,600
Optical viewfinder Electronic viewfinder (2360k dots)
3.0 LCD, 230k dots 3.0 LCD, 1037k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
3 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
550 shots per battery charge350 shots per battery charge
124 x 96 x 75 mm, 505 g 130 x 94 x 63 mm, 497 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Olympus OM-D E-M1? 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

An illustration of the physical size and weight of the Nikon D3100 and the Olympus E-M1 is provided 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 D3100 can be obtained in two different colors (black, red), while the E-M1 is also available in two color-versions, but different ones (black, silver).

Size Nikon D3100 vs Olympus E-M1
Compare D3100 versus E-M1 top
Comparison D3100 or E-M1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-M1 is somewhat larger (3 percent) than the Nikon D3100. However, the E-M1 is slightly lighter (2 percent) than the D3100. It is noteworthy in this context that the E-M1 is splash and dust-proof, while the D3100 does not feature any corresponding weather-sealing.

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 Nikon Lens Catalog (D3100) and the Micro Four Thirds Lens Catalog (E-M1). Mirrorless cameras, such as the E-M1, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the D3100 gets 550 shots out of its EN-EL14 battery, while the E-M1 can take 350 images on a single charge of its BLN-1 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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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
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599i
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399i
 
Nikon D5600 124 mm 97 mm 70 mm 465 g 970 n Nov 2016 699 i
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499i
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499i
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599i
 
Nikon D5100 128 mm 97 mm 79 mm 560 g 660 n Apr 2011 749i
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599i
 
Nikon D5000 127 mm 104 mm 80 mm 590 g 510 n Apr 2009 749i
 
Nikon D60 126 mm 94 mm 64 mm 522 g 500 n Jan 2008 629i
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729i
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499i
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999 i
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099i
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999i
 
Olympus E-M5 122 mm 89 mm 43 mm 425 g 360 Y Feb 2012 1,299i
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 1,499i
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 D3100 was launched at a markedly lower price (by 57 percent) than the E-M1, 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.

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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. 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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Nikon D3100 features an APS-C sensor and the Olympus E-M1 a Four Thirds sensor. The sensor area in the E-M1 is 37 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the D3100 has a native 3:2 aspect ratio, while the one in the E-M1 offers a 4:3 aspect.

Nikon D3100 and Olympus E-M1 sensor measures

Despite having a smaller sensor, the E-M1 offers a higher resolution of 15.9 megapixels, compared with 14.2 MP of the D3100. 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 5.01μm for the D3100). However, it should be noted that the E-M1 is much more recent (by 3 years) than the D3100, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the E-M1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The E-M1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Nikon D3100 has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 100-12800. The corresponding ISO settings for the Olympus OM-D E-M1 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

D3100 versus E-M1 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 E-M1 has a markedly higher DXO score than the D3100 (overall score 6 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 1.4 EV in additional dynamic range, and 0.3 stops of reduced 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
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
 
Nikon D5600 APS-C 24.0 6000 40001080/60p24.114.0130684
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
 
Nikon D5100 APS-C 16.1 4928 32641080/30p23.513.6118380
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
 
Nikon D5000 APS-C 12.2 4288 2848720/24p22.712.586872
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
 
Olympus E-M5 Four Thirds 15.9 4608 34561080/60i22.812.382671
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the E-M1 provides a faster frame rate than the D3100. It can shoot movie footage at 1080/30p, while the Nikon is limited to 1080/24p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-M1 has an electronic viewfinder (2360k dots), while the D3100 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the E-M1 offers a wider field of view (100%) than the one in the D3100 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the E-M1 has a higher magnification (0.74x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Nikon D3100, the Olympus E-M1, 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
 
Nikon D3100optical n 3.0 230 fixed n 1/4000s 3.0 Y n
 
Olympus E-M12360 n 3.0 1037 tilting Y 1/8000s 10.0 n Y
 
Nikon D5600optical n 3.2 1037 swivel Y 1/4000s 5.0 Y n
 
Nikon D3400optical n 3.0 921 fixed n 1/4000s 5.0 Y n
 
Nikon D3300optical n 3.0 921 fixed n 1/4000s 5.0 Y n
 
Nikon D3200optical n 3.0 921 fixed n 1/4000s 4.0 Y n
 
Nikon D5100optical n 3.0 921 swivel n 1/4000s 4.0 Y n
 
Nikon D3000optical n 3.0 230 fixed n 1/4000s 3.0 Y n
 
Nikon D5000optical n 2.7 230 full-flex n 1/4000s 4.0 Y n
 
Nikon D60optical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Nikon D40Xoptical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Nikon D40optical n 2.5 230 fixed n 1/4000s 2.5 Y n
 
Olympus E-M1 II2360 n 3.0 1037 swivel Y 1/8000s 18.0 n Y
 
Olympus E-M5 II2360 n 3.0 1037 swivel Y 1/8000s 10.0 n Y
 
Olympus E-P5optional n 3.0 1037 tilting Y 1/8000s 9.0 Y Y
 
Olympus E-M51440 n 3.0 610 tilting Y 1/4000s 9.0 n Y
 
Panasonic GH42359 n 3.0 1036 swivel Y 1/8000s 12.0 Y n

One difference between the cameras concerns the presence of an on-board flash. The D3100 has one, while the E-M1 does not. While the built-in flash of the D3100 is not very powerful, it can at times be useful as a fill-in light.

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-M1 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-M1 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.

Concerning the storage of imaging data, both the D3100 and the E-M1 write their files to SDXC cards. The E-M1 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D3100 cannot take advantage of Ultra High Speed SD cards.

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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 Nikon D3100 and Olympus OM-D E-M1 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
 
Nikon D3100Ymonomono--mini2.0---
 
Olympus E-M1YstereomonoY-micro2.0Y--
 
Nikon D5600YstereomonoY-mini2.0YYY
 
Nikon D3400Ymonomono--mini2.0--Y
 
Nikon D3300YmonomonoY-mini2.0---
 
Nikon D3200YmonomonoY-mini2.0---
 
Nikon D5100YmonomonoY-mini2.0---
 
Nikon D3000Y-----2.0---
 
Nikon D5000Ymonomono--mini2.0---
 
Nikon D60Y-----2.0---
 
Nikon D40XY-----2.0---
 
Nikon D40Y-----2.0---
 
Olympus E-M1 IIYstereomonoYYmicro3.0Y--
 
Olympus E-M5 IIYstereomonoY-micro2.0Y--
 
Olympus E-P5Ystereomono--micro2.0Y--
 
Olympus E-M5Ystereomono--mini2.0---
 
Panasonic GH4YstereomonoYYmicro2.0YY-

It is notable that the E-M1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D3100 does not provide wifi capability.

Studio photographers will appreciate that the Olympus E-M1 (unlike the D3100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D3100 and the E-M1 have been discontinued, but can regularly be found used on eBay. The D3100 was replaced by the Nikon D3200, while the E-M1 was followed by the Olympus E-M1 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Olympus websites.

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Review summary

So what is the bottom line? Is there a clear favorite between the Nikon D3100 and the Olympus E-M1? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Nikon D3100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Longer lasting: Can take more shots (550 versus 350) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (57 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2010).

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Reasons to prefer the Olympus OM-D E-M1:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
  • Better video: Provides higher movie framerates (1080/30p versus 1080/24p).
  • 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.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.53x).
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 230k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 3 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.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 3 years of technical progress since the D3100 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the E-M1 is the clear winner of the contest (23 : 6 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D3100 06:23 E-M1

How about other alternatives? Do the specifications of the Nikon D3100 and the Olympus E-M1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the D3100 or the E-M1. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Nikon D3100+ +72/1004.5/55/54.5/5 Aug 2010 599i
 
Olympus E-M1+ +84/1004.5/54.5/54.5/5 Sep 2013 1,399i
 
Nikon D5600..79/1004.5/54.5/54/5 Nov 2016 699 i
 
Nikon D3400+76/1004/54.5/54.5/5 Aug 2016 499i
 
Nikon D3300+77/1004.5/54.5/54.5/5 Jan 2014 499i
 
Nikon D3200+ +73/1004.5/54.5/54.5/5 Apr 2012 599i
 
Nikon D5100+ +76/1004.5/55/54.5/5 Apr 2011 749i
 
Nikon D3000+72/1004/53.5/54.5/5 Jul 2009 599i
 
Nikon D5000+ +75/1004/55/54.5/5 Apr 2009 749i
 
Nikon D6080/100+ +4/5o4.5/5 Jan 2008 629i
 
Nikon D40X79/100+ +4/5o4/5 Mar 2007 729i
 
Nikon D4081/100+ +o5/54.5/5 Nov 2006 499i
 
Olympus E-M1 II+ +85/1004.5/55/54.5/5 Sep 2016 1,999 i
 
Olympus E-M5 II+ +81/1005/54.5/55/5 Feb 2015 1,099i
 
Olympus E-P5+ +78/1004.5/54.5/55/5 May 2013 999i
 
Olympus E-M5+ +80/1004.5/55/55/5 Feb 2012 1,299i
 
Panasonic GH4+ +85/1005/55/55/5 Feb 2014 1,499i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Nikon D3100:
Check Ebay offers
Olympus E-M1:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes 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: Nikon D3100 vs Olympus E-M1

    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 Nikon D3100 Olympus E-M1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Nikon F mount lenses Micro Four Thirds lenses
    Launch Date August 2010 September 2013
    Launch Price USD 599 USD 1,399
    Sensor Specs Nikon D3100 Olympus E-M1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Four Thirds Sensor
    Sensor Size 23.1 x 15.4 mm 17.3 x 13.0 mm
    Sensor Area 355.74 mm2 224.9 mm2
    Sensor Diagonal 27.8 mm 21.6 mm
    Crop Factor 1.5x 2.0x
    Sensor Resolution 14.2 Megapixels 15.9 Megapixels
    Image Resolution 4608 x 3072 pixels 4608 x 3456 pixels
    Pixel Pitch 5.01 μm 3.76 μm
    Pixel Density 3.98 MP/cm2 7.08 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/24p Video 1080/30p Video
    ISO Setting 100 - 3,200 ISO 200 - 25,600 ISO
    ISO Boost 100 - 12,800 ISO 100 - 25,600 ISO
    Image Processor EXPEED 2 TruePIC VII
    DXO Sensor Quality (score) 67 73
    DXO Color Depth (bits) 22.5 23.0
    DXO Dynamic Range (EV) 11.3 12.7
    DXO Low Light (ISO) 919 757
    Screen Specs Nikon D3100 Olympus E-M1
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.53x 0.74x
    Viewfinder Resolution 2360k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 230k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Nikon D3100 Olympus E-M1
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 3 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy100 000 actuations150 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Nikon D3100 Olympus E-M1
    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
    Wifi Support no Wifi Wifi built-in
    Body Specs Nikon D3100 Olympus E-M1
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type EN-EL14 BLN-1
    Battery Life (CIPA)550 shots per charge350 shots per charge
    Body Dimensions 124 x 96 x 75 mm
    (4.9 x 3.8 x 3.0 in)
    130 x 94 x 63 mm
    (5.1 x 3.7 x 2.5 in)
    Camera Weight 505 g (17.8 oz) 497 g (17.5 oz)

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