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Olympus E-M10 III versus Canon G7 X Mark II

The Olympus OM-D E-M10 Mark III and the Canon PowerShot G7 X Mark II are two digital cameras that were revealed to the public, respectively, in August 2017 and February 2016. The E-M10 III is a mirrorless interchangeable lens camera, while the G7X Mark II is a fixed lens compact. The cameras are based on a Four Thirds (E-M10 III) and an one-inch (G7X Mark II) sensor. The Olympus has a resolution of 15.9 megapixel, whereas the Canon provides 20 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 G7 X Mark II

An illustration of the physical size and weight of the Olympus E-M10 III and the Canon G7 X Mark II is provided in the side-by-side display below. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter. You can also use the toggle button 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 – the E-M10 III – represents the basis or 100 percent across all the size and weight measures).

Snapsort Olympus E-M10 III vs Canon G7 X Mark II
Compare E-M10 III versus G7X Mark II top
Compare E-M10 III and G7X Mark II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G7 X Mark II is considerably smaller (37 percent) than the Olympus E-M10 III. In this context, it is worth noting that neither the E-M10 III nor the G7X Mark II are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X Mark II has a lens build in, whereas the E-M10 III is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the E-M10 III and their specifications in the Micro Four Thirds Lens Catalog.

Concerning battery life, the E-M10 III gets 330 shots out of its BLS-50 battery, while the G7X Mark II can take 265 images on a single charge of its NB-13L power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons 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)
Olympus E-M10 III» 4.8 in 3.3 in 2.0 in 14.5 oz 330 n Aug 2017 649 i i
Canon G7 X Mark II« 4.2 in 2.4 in 1.7 in 11.3 oz 265 n Feb 2016 699 i i
Canon SX730« » 4.3 in 2.5 in 1.6 in 10.6 oz 250 n Apr 2017 399 i i
Canon M100« » 4.3 in 2.6 in 1.4 in 10.7 oz 295 n Aug 2017 499 i i
Canon M6« » 4.4 in 2.7 in 1.8 in 13.8 oz 295 n Feb 2017 779 i i
Canon M3« » 4.4 in 2.7 in 1.7 in 12.9 oz 250 n Feb 2015 679- i
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i
Olympus E-PL9« » 4.6 in 2.7 in 1.5 in 13.4 oz 350 n Feb 2018 549 i i
Olympus PEN-F« » 4.9 in 2.8 in 1.5 in 15.1 oz 330 n Jan 2016 1,199 i i
Olympus E-PL8« » 4.5 in 2.6 in 1.5 in 12.6 oz 350 n Sep 2016 549- i
Olympus E-M10 II« » 4.7 in 3.3 in 1.9 in 13.8 oz 320 n Aug 2015 799- i
Olympus E-PL7« » 4.5 in 2.6 in 1.5 in 12.6 oz 350 n Aug 2014 599- i
Olympus E-M10« » 4.7 in 3.2 in 1.8 in 14.0 oz 320 n Jan 2014 699- i
Olympus E-PL6« » 4.4 in 2.5 in 1.5 in 11.5 oz 360 n May 2013 599- i
Olympus E-PL5« » 4.4 in 2.5 in 1.5 in 11.5 oz 360 n Sep 2012 599- i
Olympus E-PL2« » 4.5 in 2.8 in 1.7 in 12.8 oz 280 n Jan 2011 599- i
Panasonic GX85« » 4.8 in 2.8 in 1.7 in 15.0 oz 290 n Apr 2016 799 i i

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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: Olympus E-M10 III vs Canon G7 X Mark II

The size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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-M10 III features a Four Thirds sensor and the Canon G7 X Mark II an one-inch sensor. The sensor area in the G7X Mark II is 48 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 2.7. The sensor in the E-M10 III has a native 4:3 aspect ratio, while the one in the G7X Mark II offers a 3:2 aspect.

Olympus E-M10 III and Canon G7 X Mark II sensor measures

Despite having a smaller sensor, the G7X Mark II offers a higher resolution of 20 megapixel, compared with 15.9 MP of the E-M10 III. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 3.76μm for the E-M10 III). Moreover, it should be noted that the E-M10 III is a somewhat more recent model (by 1 year and 6 months) than the G7X Mark II, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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 G7X Mark II MP

For most cameras, data on sensor performance has been reported by DXO Mark. 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"). 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 Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Olympus E-M10 III» Four Thirds 15.9 4608 34564K/30p----
Canon G7 X Mark II« 1-inch 20.0 5472 36481080/60p----
Canon SX730« » 1/2.3 20.2 5184 38881080/60p----
Canon M100« » APS-C 24.0 6000 40001080/60p23.512.9127278
Canon M6« » APS-C 24.0 6000 40001080/60p----
Canon M3« » APS-C 24.0 6000 40001080/30p22.811.8116972
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----
Olympus E-PL9« » Four Thirds 15.9 4608 34564K/30p----
Olympus PEN-F« » Four Thirds 20.2 5184 38881080/60p23.112.489474
Olympus E-PL8« » Four Thirds 15.9 4608 34561080/30p----
Olympus E-M10 II« » Four Thirds 15.9 4608 34561080/60p23.112.584273
Olympus E-PL7« » Four Thirds 15.9 4608 34561080/30p22.712.487372
Olympus E-M10« » Four Thirds 15.9 4608 34561080/30p22.812.388472
Olympus E-PL6« » Four Thirds 15.9 4608 34561080/30p----
Olympus E-PL5« » Four Thirds 15.9 4608 34561080/30p22.812.388972
Olympus E-PL2« » Four Thirds 12.2 4032 3024720/30p21.410.257355
Panasonic GX85« » Four Thirds 15.8 4592 34484K/30p22.912.666271

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the E-M10 III provides a higher video resolution than the G7X Mark II. It can shoot video footage at 4K/30p, while the Canon is limited to 1080/60p.

 

Feature comparison: Olympus E-M10 III vs Canon G7 X Mark II

Beyond 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), which can be very helpful when shooting in bright sunlight. In contrast, the G7X Mark II relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Olympus E-M10 III, the Canon G7 X Mark II, and comparable cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
  Camera 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
Olympus E-M10 III»2360 n 3.0 1040 tilting Y 4000 8.6 Y Y
Canon G7 X Mark II«- n 3.0 1040 tilting Y 2000 8.0 Y Y
Canon SX730« »- n 3.0 922 tilting n 3200 5.9 Y Y
Canon M100« »- n 3.0 1040 tilting Y 4000 6.1 Y n
Canon M6« »- n 3.0 1040 tilting Y 4000 9.0 Y n
Canon M3« »- n 3.0 1040 tilting Y 4000 4.2 Y n
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y
Olympus E-PL9« »- n 3.0 1040 tilting Y 4000 8.6 Y Y
Olympus PEN-F« »2360 n 3.0 1037 swivel Y 8000 10.0 n Y
Olympus E-PL8« »- n 3.0 1037 tilting Y 4000 8.0 n Y
Olympus E-M10 II« »2360 n 3.0 1040 tilting Y 4000 8.0 Y Y
Olympus E-PL7« »- n 3.0 1037 tilting Y 4000 8.0 n Y
Olympus E-M10« »1440 n 3.0 1037 tilting Y 4000 8.0 Y Y
Olympus E-PL6« »- n 3.0 460 tilting Y 4000 8.0 n Y
Olympus E-PL5« »- n 3.0 460 tilting Y 4000 8.0 n Y
Olympus E-PL2« »- n 3.0 460 fixed n 4000 3.0 Y Y
Panasonic GX85« »2765 n 3.0 1040 tilting Y 4000 8.0 Y Y

Both the E-M10 III and the G7X Mark II are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The G7X Mark II replaced the earlier Canon G7 X, while the E-M10 III followed on from the Olympus E-M10 II.

Review summary: Olympus E-M10 III vs Canon G7 X Mark II

So how do things add up? Is the Olympus E-M10 III better than the Canon G7 X Mark II or vice versa? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Olympus OM-D E-M10 Mark III:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Features a larger and more technologically advanced imaging sensor.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 2000/sec) to freeze action.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Longer lasting: Can take more shots (330 versus 265) on a single battery charge.
  • More modern: Is somewhat more recent (announced 1 year and 6 months after the G7X Mark II).

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Arguments in favor of the Canon PowerShot G7 X Mark II:

  • More detail: Has more megapixels (20 vs 15.9MP), which boosts linear resolution by 14%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Ready to shoot: Has an integrated lens, whereas the E-M10 III necessitates an extra lens.
  • More compact: Is smaller (106x61mm vs 122x84mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the E-M10 III).
  • More heavily discounted: Has been on the market for longer (launched in February 2016).

If the count of relative strengths (bullet points above) is taken as a measure, the E-M10 III emerges as the winner of the contest (8 : 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.

E-M10 III 08:06 G7X Mark II

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the E-M10 III or the G7X Mark II handle or perform in practice. 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 hands-on reviews by experts are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review scores
  Camera cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Olympus E-M10 III»Rec80/1004.5/5-4.5/5 Aug 2017 649 i i
Canon G7 X Mark II«HiRec81/1004.5/54/54.5/5 Feb 2016 699 i i
Canon SX730« »Rec-4/5-4/5 Apr 2017 399 i i
Canon M100« »Rec-4/5-3.5/5 Aug 2017 499 i i
Canon M6« »-80/1004/54.5/54/5 Feb 2017 779 i i
Canon M3« »rev75/1004.5/54.5/54/5 Feb 2015 679- i
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i
Olympus E-PL9« »--4.5/5-4/5 Feb 2018 549 i i
Olympus PEN-F« »-82/1004.5/54.5/55/5 Jan 2016 1,199 i i
Olympus E-PL8« »--4.5/5-4/5 Sep 2016 549- i
Olympus E-M10 II« »HiRec80/1005/55/55/5 Aug 2015 799- i
Olympus E-PL7« »Rec-5/54.5/54/5 Aug 2014 599- i
Olympus E-M10« »-80/1005/54.5/55/5 Jan 2014 699- i
Olympus E-PL6« »----- May 2013 599- i
Olympus E-PL5« »HiRec-4.5/54.5/54.5/5 Sep 2012 599- i
Olympus E-PL2« »83/10071/1004.5/54.5/54.5/5 Jan 2011 599- i
Panasonic GX85« »HiRec82/1005/54.5/55/5 Apr 2016 799 i i

Care should be taken when interpreting the review scores above, 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please contact me, and I will try to locate and add the respective data to the application.

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