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Panasonic GX8 versus Olympus E-M10 III

The Panasonic Lumix DMC-GX8 and the Olympus OM-D E-M10 Mark III are two digital cameras that were revealed to the public, respectively, in July 2015 and August 2017. Both the GX8 and the E-M10 III are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The Panasonic has a resolution of 20.2 megapixel, whereas the Olympus provides 15.9 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: Panasonic GX8 vs Olympus E-M10 III

An illustration of the physical size and weight of the Panasonic GX8 and the Olympus E-M10 III is provided in the side-by-side display below. Three consecutive views from the front, the top, and the rear side 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 – the GX8 – represents the basis or 100 percent across all the size and weight measures).

Compare Panasonic GX8 vs Olympus E-M10 III
GX8 versus E-M10 III top view
GX8 and E-M10 III rear side
Body view (GX8 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-M10 III is somewhat smaller (1 percent) than the Panasonic GX8. Moreover, the E-M10 III is markedly lighter (16 percent) than the GX8. It is worth mentioning in this context that the GX8 is splash and dust resistant, while the E-M10 III 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can find an overview of suitable optics in the Micro Four Thirds Lens Catalog. 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.

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 Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX8 (⇒ rgt) 133 mm 78 mm 63 mm 487 g 330 YES 2015 1,199discont. check
Olympus E-M10 III (⇒ lft) 122 mm 84 mm 50 mm 410 g 330 no 2017 649 latest check
Olympus E-PL9 (⇒ lft | rgt) 117 mm 68 mm 39 mm 380 g 350 no 2018 549 latest check
Olympus E-M1 II (⇒ lft | rgt) 134 mm 91 mm 67 mm 574 g 440 YES 2016 1,999 latest check
Olympus PEN-F (⇒ lft | rgt) 125 mm 72 mm 37 mm 427 g 330 no 2016 1,199 latest check
Olympus E-PL8 (⇒ lft | rgt) 115 mm 67 mm 38 mm 357 g 350 no 2016 549discont. check
Olympus E-M10 II (⇒ lft | rgt) 120 mm 83 mm 47 mm 390 g 320 no 2015 799discont. check
Olympus E-M5 II (⇒ lft | rgt) 124 mm 85 mm 45 mm 469 g 310 YES 2015 1,099 latest check
Olympus E-PL7 (⇒ lft | rgt) 115 mm 67 mm 38 mm 357 g 350 no 2014 599discont. check
Olympus E-M10 (⇒ lft | rgt) 119 mm 82 mm 46 mm 396 g 320 no 2014 699discont. check
Panasonic GX9 (⇒ lft | rgt) 124 mm 72 mm 47 mm 407 g 260 no 2018 849 latest check
Panasonic GH5 (⇒ lft | rgt) 139 mm 98 mm 87 mm 725 g 410 YES 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) 128 mm 89 mm 74 mm 505 g 330 YES 2016 899 latest check
Panasonic GX85 (⇒ lft | rgt) 122 mm 71 mm 44 mm 426 g 290 no 2016 799 latest check
Panasonic GX7 (⇒ lft | rgt) 123 mm 71 mm 55 mm 402 g 350 no 2013 999discont. check
Sony A6300 (⇒ lft | rgt) 120 mm 67 mm 49 mm 404 g 400 YES 2016 999discont. check
Sony A6500 (⇒ lft | rgt) 120 mm 67 mm 53 mm 453 g 350 YES 2016 1,399 latest check

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. The E-M10 III was launched at a markedly lower price (by 46 percent) than the GX8, 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: Panasonic GX8 vs Olympus E-M10 III

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.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Panasonic GX8 and Olympus E-M10 III sensor measures
Sensor size

While the two cameras under review share the same sensor size, the GX8 offers a higher resolution of 20.2 megapixel, compared with 15.9 MP of the E-M10 III. This megapixel advantage translates into a 13 percent gain in linear resolution. On the other hand, these sensor specs imply that the GX8 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 3.76μm for the E-M10 III). Moreover, it should be noted that the E-M10 III is much more recent (by 2 years and 1 month) than the GX8, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of individual 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.

GX8 versus E-M10 III MP
Sensor resolution

Consistent information on actual sensor performance is available from DXO Mark for most cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GX8 (⇒ rgt) Four Thirds 20.2 5184 3888 4K/30p 23.5 12.6 806 75
Olympus E-M10 III (⇒ lft) Four Thirds 15.9 4608 3456 4K/30p .. .. .. ..
Olympus E-PL9 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/30p - - - -
Olympus E-M1 II (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.7 12.8 1312 80
Olympus PEN-F (⇒ lft | rgt) Four Thirds 20.2 5184 3888 1080/60p 23.1 12.4 894 74
Olympus E-PL8 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p - - - -
Olympus E-M10 II (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 23.1 12.5 842 73
Olympus E-M5 II (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 23.0 12.5 842 73
Olympus E-PL7 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.7 12.4 873 72
Olympus E-M10 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.3 884 72
Panasonic GX9 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p .. .. .. ..
Panasonic GH5 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/60p 23.9 13.0 807 77
Panasonic G85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.8 12.5 656 71
Panasonic GX85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70
Sony A6300 (⇒ lft | rgt) APS-C 24.0 6000 4000 4K/30p 24.4 13.7 1437 85
Sony A6500 (⇒ lft | rgt) APS-C 24.0 6000 4000 4K/30p 24.5 13.7 1405 85

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

Feature comparison: Panasonic GX8 vs Olympus E-M10 III

Beyond body and sensor, cameras can and do differ across a range of features. The GX8 and the E-M10 III are similar in the sense that both feature an electronic viewfinder, which is helpful when framing images in bright sunlight. Moreover, their viewfinders offer an identical resolution of 2360k dots. The adjacent table lists some of the other core features of the Panasonic GX8 and Olympus E-M10 III along with similar information for a selection of comparators. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Panasonic GX8 (⇒ rgt) 2360 no 3.0 1040 swivel YES 8000 10.0 no YES
Olympus E-M10 III (⇒ lft) 2360 no 3.0 1040 tilting YES 4000 8.6 5.8 YES
Olympus E-PL9 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 8.6 7.6 YES
Olympus E-M1 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 18.0 no YES
Olympus PEN-F (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 10.0 no YES
Olympus E-PL8 (⇒ lft | rgt) no no 3.0 1037 tilting YES 4000 8.0 no YES
Olympus E-M10 II (⇒ lft | rgt) 2360 no 3.0 1040 tilting YES 4000 8.0 5.8 YES
Olympus E-M5 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 10.0 no YES
Olympus E-PL7 (⇒ lft | rgt) no no 3.0 1037 tilting YES 4000 8.0 no YES
Olympus E-M10 (⇒ lft | rgt) 1440 no 3.0 1037 tilting YES 4000 8.0 5.8 YES
Panasonic GX9 (⇒ lft | rgt) 2760 no 3.0 1240 tilting YES 4000 9.0 6 YES
Panasonic GH5 (⇒ lft | rgt) 3680 no 3.2 1620 swivel YES 8000 12.0 no YES
Panasonic G85 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 9.0 6.2 YES
Panasonic GX85 (⇒ lft | rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES
Sony A6300 (⇒ lft | rgt) 2300 no 3.0 922 tilting no 4000 11.0 6 no
Sony A6500 (⇒ lft | rgt) 2300 no 3.0 922 tilting YES 4000 11.0 6 YES

The E-M10 III is a current model that online retailers, such as amazon, will have in stock. In contrast, the GX8 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the GX8 was succeeded by the Panasonic GX9.

Review summary: Panasonic GX8 vs Olympus E-M10 III

So what is the bottom line? Is the Panasonic GX8 better than the Olympus E-M10 III or vice versa? A synthesis of the relative strong points of each of the models is listed below.


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Arguments in favor of the Panasonic Lumix DMC-GX8:

  • More detail: Offers more megapixels (20.2 vs 15.9MP) with a 13% higher linear resolution.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 8.6 flaps/sec) to capture the decisive moment.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • More heavily discounted: Has been available for much longer (launched in July 2015).

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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.
  • Less heavy: Has a lower weight (by 77g or 16 percent) and is thus easier to take along.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (46 percent cheaper at launch).
  • More modern: Reflects 2 years and 1 month of technical progress since the GX8 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the GX8 emerges as the winner of the contest (7 : 5 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.

GX8 07:05 E-M10 III

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 GX8 or the E-M10 III handle or 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. This is why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. You can find the full text of the reviews, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
.com
dp
review
.com
ephoto
zine
.com
imaging
resource
.com
photography
blog
.com
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX8 (⇒ rgt) Rec 82/100 Silver 4.5/5 5/5 4.5/5 2015 1,199discont. check
Olympus E-M10 III (⇒ lft) Rec 80/100 4.5/5 .. 4.5/5 2017 649 latest check
Olympus E-PL9 (⇒ lft | rgt) .. .. .. .. 4/5 2018 549 latest check
Olympus E-M1 II (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 4.5/5 2016 1,999 latest check
Olympus PEN-F (⇒ lft | rgt) - 82/100 Silver 4.5/5 4.5/5 5/5 2016 1,199 latest check
Olympus E-PL8 (⇒ lft | rgt) - - 4.5/5 - 4/5 2016 549discont. check
Olympus E-M10 II (⇒ lft | rgt) HiRec 80/100 Silver 5/5 5/5 5/5 2015 799discont. check
Olympus E-M5 II (⇒ lft | rgt) HiRec 81/100 Silver 5/5 4.5/5 5/5 2015 1,099 latest check
Olympus E-PL7 (⇒ lft | rgt) Rec - 5/5 4.5/5 4/5 2014 599discont. check
Olympus E-M10 (⇒ lft | rgt) - 80/100 Gold 5/5 4.5/5 5/5 2014 699discont. check
Panasonic GX9 (⇒ lft | rgt) Rec .. 4.5/5 .. 4.5/5 2018 849 latest check
Panasonic GH5 (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 5/5 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) HiRec 84/100 Gold 5/5 4.5/5 4.5/5 2016 899 latest check
Panasonic GX85 (⇒ lft | rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check
Sony A6300 (⇒ lft | rgt) Rec 85/100 Gold 5/5 5/5 5/5 2016 999discont. check
Sony A6500 (⇒ lft | rgt) HiRec 85/100 Silver 4.5/5 5/5 4.5/5 2016 1,399 latest check

Care should be taken when interpreting the review scores above, 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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. 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 send me an email, and I will try to add information on that model to the database.

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