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Olympus E-M10 III versus Canon 100D

The Olympus OM-D E-M10 Mark III and the Canon EOS 100D (labelled Canon SL1 in some countries) are two digital cameras that were announced, respectively, in August 2017 and March 2013. The E-M10 III is a mirrorless interchangeable lens camera, while the 100D is a DSLR. The cameras are based on a Four Thirds (E-M10 III) and an APS-C (100D) sensor. The Olympus has a resolution of 15.9 megapixel, whereas the Canon provides 17.9 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Olympus E-M10 III vs Canon 100D

An illustration of the physical size and weight of the Olympus E-M10 III and the Canon 100D is provided 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 size dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left side – the E-M10 III – represents the basis for the calculations across all the size and weight measures).

Compare Olympus E-M10 III vs Canon 100D
Compare E-M10 III versus 100D top
Compare E-M10 III and 100D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 100D is somewhat larger (4 percent) than the Olympus E-M10 III. However, the 100D is slightly lighter (1 percent) than the E-M10 III. In this context, it is worth noting that neither the E-M10 III nor the 100D 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 find an overview of optics for the two cameras in the Micro Four Thirds Lens Catalog (E-M10 III) and the Canon EF Lens Catalog (100D). Mirrorless cameras, such as the Olympus E-M10 III, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.

Concerning battery life, the E-M10 III gets 330 shots out of its BLS-50 battery, while the 100D can take 380 images on a single charge of its LP-E12 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Olympus E-M10 III» 4.8 in 3.3 in 2.0 in 14.5 oz 330 n Aug 2017 649 i i Olympus E-M10 III
Canon 100D« 4.6 in 3.6 in 2.7 in 14.4 oz 380 n Mar 2013 549- i Canon 100D
Canon 200D« » 4.8 in 3.7 in 2.8 in 16.0 oz 650 n Jun 2017 549 i i Canon 200D
Canon 1200D« » 5.1 in 3.9 in 3.1 in 16.9 oz 500 n Feb 2014 449- i Canon 1200D
Canon 700D« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon 700D
Canon G16« » 4.3 in 3.0 in 1.6 in 12.6 oz 360 n Aug 2013 549 i i Canon G16
Olympus E-PL9« » 4.6 in 2.7 in 1.5 in 13.4 oz 350 n Feb 2018 549 i i Olympus E-PL9
Olympus PEN-F« » 4.9 in 2.8 in 1.5 in 15.1 oz 330 n Jan 2016 1,199 i i Olympus PEN-F
Olympus E-PL8« » 4.5 in 2.6 in 1.5 in 12.6 oz 350 n Sep 2016 549- i Olympus E-PL8
Olympus E-M10 II« » 4.7 in 3.3 in 1.9 in 13.8 oz 320 n Aug 2015 799- i Olympus E-M10 II
Olympus E-PL7« » 4.5 in 2.6 in 1.5 in 12.6 oz 350 n Aug 2014 599- i Olympus E-PL7
Olympus E-M10« » 4.7 in 3.2 in 1.8 in 14.0 oz 320 n Jan 2014 699- i Olympus E-M10
Olympus E-PL6« » 4.4 in 2.5 in 1.5 in 11.5 oz 360 n May 2013 599- i Olympus E-PL6
Olympus E-PL5« » 4.4 in 2.5 in 1.5 in 11.5 oz 360 n Sep 2012 599- i Olympus E-PL5
Olympus E-PL2« » 4.5 in 2.8 in 1.7 in 12.8 oz 280 n Jan 2011 599- i Olympus E-PL2
Panasonic GX85« » 4.8 in 2.8 in 1.7 in 15.0 oz 290 n Apr 2016 799 i i Panasonic GX85
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6

Any camera purchase will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 100D was launched at a somewhat lower price (by 15 percent) than the E-M10 III, 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: Olympus E-M10 III vs Canon 100D

The size of the sensor inside a digital camera is one of the key determinants 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Olympus E-M10 III features a Four Thirds sensor and the Canon 100D an APS-C sensor. The sensor area in the 100D is 48 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.6. The sensor in the E-M10 III has a native 4:3 aspect ratio, while the one in the 100D offers a 3:2 aspect.

In terms of underlying technology, both cameras are build around CMOS sensors.

Olympus E-M10 III and Canon 100D sensor measures

With 17.9MP, the 100D offers a higher resolution than the E-M10 III (15.9MP), but the 100D nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 3.76μm for the E-M10 III) due to its larger sensor. However, the E-M10 III is a much more recent model (by 4 years and 5 months) than the 100D, and its sensor will 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 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

E-M10 III versus 100D MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Olympus E-M10 III» Four Thirds 15.9 4608 34564K/30p----Olympus E-M10 III
Canon 100D« APS-C 17.9 5184 34561080/30p21.811.384363Canon 100D
Canon 200D« » APS-C 24.0 6000 40001080/60p23.613.4104179Canon 200D
Canon 1200D« » APS-C 17.9 5184 34561080/30p21.911.372463Canon 1200D
Canon 700D« » APS-C 17.9 5184 34561080/30p21.711.268161Canon 700D
Canon G16« » 1/1.7 12.0 4000 30001080/60p21.011.723054Canon G16
Olympus E-PL9« » Four Thirds 15.9 4608 34564K/30p----Olympus E-PL9
Olympus PEN-F« » Four Thirds 20.2 5184 38881080/60p23.112.489474Olympus PEN-F
Olympus E-PL8« » Four Thirds 15.9 4608 34561080/30p----Olympus E-PL8
Olympus E-M10 II« » Four Thirds 15.9 4608 34561080/60p23.112.584273Olympus E-M10 II
Olympus E-PL7« » Four Thirds 15.9 4608 34561080/30p22.712.487372Olympus E-PL7
Olympus E-M10« » Four Thirds 15.9 4608 34561080/30p22.812.388472Olympus E-M10
Olympus E-PL6« » Four Thirds 15.9 4608 34561080/30p----Olympus E-PL6
Olympus E-PL5« » Four Thirds 15.9 4608 34561080/30p22.812.388972Olympus E-PL5
Olympus E-PL2« » Four Thirds 12.2 4032 3024720/30p21.410.257355Olympus E-PL2
Panasonic GX85« » Four Thirds 15.8 4592 34484K/30p22.912.666271Panasonic GX85
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6

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, but the E-M10 III provides a higher video resolution than the 100D. It can shoot video footage at 4K/30p, while the Canon is limited to 1080/30p.

 

Feature comparison: Olympus E-M10 III vs Canon 100D

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-M10 III has an electronic viewfinder (2360k dots), while the 100D 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 table below summarizes some of the other core capabilities of the Olympus E-M10 III and Canon 100D in connection with corresponding information for a sample of similar cameras. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

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)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Olympus E-M10 III»2360 n 3.0 1040 tilting Y 4000 8.6 Y Y Olympus E-M10 III
Canon 100D«optical n 3.0 1040 fixed Y 4000 4.9 Y n Canon 100D
Canon 200D« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon 200D
Canon 1200D« »optical n 3.0 460 fixed n 4000 3.0 Y n Canon 1200D
Canon 700D« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon 700D
Canon G16« »optical n 3.0 922 fixed n 4000 2.2 Y Y Canon G16
Olympus E-PL9« »- n 3.0 1040 tilting Y 4000 8.6 Y Y Olympus E-PL9
Olympus PEN-F« »2360 n 3.0 1037 swivel Y 8000 10.0 n Y Olympus PEN-F
Olympus E-PL8« »- n 3.0 1037 tilting Y 4000 8.0 n Y Olympus E-PL8
Olympus E-M10 II« »2360 n 3.0 1040 tilting Y 4000 8.0 Y Y Olympus E-M10 II
Olympus E-PL7« »- n 3.0 1037 tilting Y 4000 8.0 n Y Olympus E-PL7
Olympus E-M10« »1440 n 3.0 1037 tilting Y 4000 8.0 Y Y Olympus E-M10
Olympus E-PL6« »- n 3.0 460 tilting Y 4000 8.0 n Y Olympus E-PL6
Olympus E-PL5« »- n 3.0 460 tilting Y 4000 8.0 n Y Olympus E-PL5
Olympus E-PL2« »- n 3.0 460 fixed n 4000 3.0 Y Y Olympus E-PL2
Panasonic GX85« »2765 n 3.0 1040 tilting Y 4000 8.0 Y Y Panasonic GX85
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6

The E-M10 III is a current model that online retailers, such as amazon, will have in stock. In contrast, the 100D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 100D was succeeded by the Canon 200D.

Review summary: Olympus E-M10 III vs Canon 100D

So how do things add up? Is the Olympus E-M10 III better than the Canon 100D or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Olympus OM-D E-M10 Mark III:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster burst: Shoots at higher frequency (8.6 vs 4.9 flaps/sec) to capture the decisive moment.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More modern: Reflects 4 years and 5 months of technical progress since the 100D launch.

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Reasons to prefer the Canon EOS 100D:

  • More detail: Has more megapixels (17.9 vs 15.9MP), which boosts linear resolution by 8%.
  • 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: Gets more shots (380 versus 330) out of a single battery charge.
  • More affordable: Was released into a lower priced segment (15 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in March 2013).

If the count of individual advantages (bullet points above) is taken as a guide, the E-M10 III emerges as the winner of the contest (8 : 6 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.

E-M10 III 08:06 100D

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the E-M10 III and the 100D 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. This is why expert reviews are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Olympus E-M10 III»Rec80/1004.5/5-4.5/5 Aug 2017 649 i i Olympus E-M10 III
Canon 100D«Rec78/1004/54/54/5 Mar 2013 549- i Canon 100D
Canon 200D« »HiRec78/1004.5/54.5/54.5/5 Jun 2017 549 i i Canon 200D
Canon 1200D« »Rec-4/54/54.5/5 Feb 2014 449- i Canon 1200D
Canon 700D« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon 700D
Canon G16« »Rec-4.5/54.5/54.5/5 Aug 2013 549 i i Canon G16
Olympus E-PL9« »Rec-4.5/5-4/5 Feb 2018 549 i i Olympus E-PL9
Olympus PEN-F« »-82/1004.5/54.5/55/5 Jan 2016 1,199 i i Olympus PEN-F
Olympus E-PL8« »--4.5/5-4/5 Sep 2016 549- i Olympus E-PL8
Olympus E-M10 II« »HiRec80/1005/55/55/5 Aug 2015 799- i Olympus E-M10 II
Olympus E-PL7« »Rec-5/54.5/54/5 Aug 2014 599- i Olympus E-PL7
Olympus E-M10« »-80/1005/54.5/55/5 Jan 2014 699- i Olympus E-M10
Olympus E-PL6« »----- May 2013 599- i Olympus E-PL6
Olympus E-PL5« »HiRec-4.5/54.5/54.5/5 Sep 2012 599- i Olympus E-PL5
Olympus E-PL2« »83/10071/1004.5/54.5/54.5/5 Jan 2011 599- i Olympus E-PL2
Panasonic GX85« »HiRec82/1005/54.5/55/5 Apr 2016 799 i i Panasonic GX85
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6

The review scores listed above should be treated with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. 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.

 

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. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If the camera you are interested in is not available, please send me an email, and I will try to update the database with the necessary infos.

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