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Panasonic GM1 versus Olympus E-M10

The Panasonic Lumix DMC-GM1 and the Olympus OM-D E-M10 are two digital cameras that were revealed to the public, respectively, in October 2013 and January 2014. Both the GM1 and the E-M10 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The Panasonic has a resolution of 15.8 megapixel, whereas the Olympus provides 15.9 MP.

Body comparison

An illustration of the physical size and weight of the Panasonic GM1 and the Olympus E-M10 is provided in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. 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 GM1 – represents the basis for the calculations across all the size and weight measures).

Panasonic GM1 vs Olympus E-M10 front
GM1 versus E-M10 top view
GM1 and E-M10 rear side
Body view (GM1 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 is considerably larger (79 percent) than the Panasonic GM1. Moreover, the E-M10 is substantially heavier (94 percent) than the GM1. Cameras that are aimed at professionals or semi-pros tend to be a bit bulkier in order to give them the necessary environmental and shock resistance. In this context, it is worth noting that neither the GM1 nor the E-M10 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. 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 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 GM1 (⇒ rgt) 3.9 in 2.2 in 1.2 in 7.2 oz 230 no 2013 749discont. check
Olympus E-M10 (⇒ lft) 4.7 in 3.2 in 1.8 in 14.0 oz 320 no 2014 699discont. check
Canon G1 X Mark II (⇒ lft | rgt) 4.6 in 2.9 in 2.6 in 19.5 oz 240 no 2014 799 latest check
Olympus E-M10 III (⇒ lft | rgt) 4.8 in 3.3 in 2.0 in 14.5 oz 330 no 2017 649 latest check
Olympus E-M10 II (⇒ lft | rgt) 4.7 in 3.3 in 1.9 in 13.8 oz 320 no 2015 799discont. check
Olympus E-M5 II (⇒ lft | rgt) 4.9 in 3.3 in 1.8 in 16.5 oz 310 YES 2015 1,099 latest check
Olympus E-M1 (⇒ lft | rgt) 5.1 in 3.7 in 2.5 in 17.5 oz 350 YES 2013 1,399discont. check
Olympus E-P5 (⇒ lft | rgt) 4.8 in 2.7 in 1.5 in 14.8 oz 330 no 2013 999discont. check
Panasonic GX85 (⇒ lft | rgt) 4.8 in 2.8 in 1.7 in 15.0 oz 290 no 2016 799 latest check
Panasonic G7 (⇒ lft | rgt) 4.9 in 3.4 in 3.0 in 14.5 oz 350 no 2015 649discont. check
Panasonic FZ1000 (⇒ lft | rgt) 5.4 in 3.9 in 5.2 in 29.3 oz 360 no 2014 899discont. check
Panasonic GH4 (⇒ lft | rgt) 5.2 in 3.7 in 3.3 in 19.8 oz 500 YES 2014 1,499discont. check
Panasonic GM5 (⇒ lft | rgt) 3.9 in 2.4 in 1.4 in 7.4 oz 220 no 2014 749discont. check
Panasonic LX100 (⇒ lft | rgt) 4.5 in 2.6 in 2.2 in 13.9 oz 300 no 2014 899 latest check
Panasonic G6 (⇒ lft | rgt) 4.8 in 3.3 in 2.8 in 13.8 oz 340 no 2013 599discont. check
Panasonic GX7 (⇒ lft | rgt) 4.8 in 2.8 in 2.2 in 14.2 oz 350 no 2013 999discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-M10 was somewhat cheaper (by 7 percent) than the GM1 at launch, but both cameras fall into the same price category. 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

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. 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 are more costly to manufacture and tent to 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 GM1 and Olympus E-M10 sensor measures
Sensor size

While the two cameras under review share the same sensor size, the E-M10 offers a higher resolution of 15.9 megapixel, compared with 15.8 MP of the GM1. This megapixel advantage translates into a 0 percent gain in linear resolution. On the other hand, these sensor specs imply that the E-M10 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.75μm versus 3.77μm for the GM1). However, it should be noted that the E-M10 is a somewhat more recent model (by 3 months) than the GM1, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of individual pixels. Coming back sensor resolution, it should be mentioned that the E-M10 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

GM1 versus E-M10 MP
Sensor resolution

For most cameras, data on sensor performance has been reported by DXO Mark. 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. Of the two cameras under consideration, the E-M10 has a markedly higher DXO score than the GM1 (overall score 6 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 0.6 EV in additional dynamic range, and 0.4 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.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GM1 (⇒ rgt) Four Thirds 15.8 4592 3448 1080/60i 22.3 11.7 660 66
Olympus E-M10 (⇒ lft) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.3 884 72
Canon G1 X Mark II (⇒ lft | rgt) 1.5-inch 13.0 4160 3120 1080/30p 21.5 10.8 581 58
Olympus E-M10 III (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/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-M1 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 23.0 12.7 757 73
Olympus E-P5 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.4 895 72
Panasonic GX85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
Panasonic G7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p - - - -
Panasonic FZ1000 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.1 11.7 517 64
Panasonic GH4 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/30p 23.2 12.8 791 74
Panasonic GM5 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.1 11.7 721 66
Panasonic LX100 (⇒ lft | rgt) Four Thirds 12.7 4112 3088 4K/30p 22.3 12.5 553 67
Panasonic G6 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 21.3 11.5 639 61
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GM1 provides a higher frame rate than the E-M10. It can shoot video footage at 1080/60i, while the Olympus is limited to 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-M10 has an electronic viewfinder (1440k dots), which can be very helpful when shooting in bright sunlight. In contrast, the GM1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Panasonic GM1 and Olympus E-M10 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 GM1 (⇒ rgt) no no 3.0 1036 fixed YES 500 5.0 4 no
Olympus E-M10 (⇒ lft) 1440 no 3.0 1037 tilting YES 4000 8.0 5.8 YES
Canon G1 X Mark II (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 5.2 6.8 no
Olympus E-M10 III (⇒ lft | rgt) 2360 no 3.0 1040 tilting YES 4000 8.6 5.8 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-M1 (⇒ lft | rgt) 2360 no 3.0 1037 tilting YES 8000 10.0 no YES
Olympus E-P5 (⇒ lft | rgt) no no 3.0 1037 tilting YES 8000 9.0 7 YES
Panasonic GX85 (⇒ lft | rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
Panasonic G7 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 7.0 9.3 no
Panasonic FZ1000 (⇒ lft | rgt) 2359 no 3.0 921 swivel no 4000 12.0 13.5 no
Panasonic GH4 (⇒ lft | rgt) 2359 no 3.0 1036 swivel YES 8000 12.0 17 no
Panasonic GM5 (⇒ lft | rgt) 1166 no 3.0 921 fixed YES 500 5.8 no no
Panasonic LX100 (⇒ lft | rgt) 2764 no 3.0 921 fixed no 4000 11.0 7 no
Panasonic G6 (⇒ lft | rgt) 1440 no 3.0 1036 swivel YES 4000 7.0 10.5 no
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES

Both the GM1 and the E-M10 have been discontinued, but can regularly be found used on ebay. The GM1 was replaced by the Panasonic GM5, while the E-M10 was followed by the Olympus E-M10 II.

Summary

So how do things add up? Which of the two cameras – the Panasonic GM1 or the Olympus E-M10 – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.


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Arguments in favor of the Panasonic Lumix DMC-GM1:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher movie framerates (1080/60i vs 1080/30p).
  • More compact: Is smaller (99x55mm vs 119x82mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 192g or 48 percent) and hence easier to carry around.
  • More heavily discounted: Has been on the market for longer (launched in October 2013).

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Advantages of the Olympus OM-D E-M10:

  • 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 (0.6 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.4 stops ISO advantage).
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has a higher mechanical shutter speed (4000/sec vs 500/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (8 vs 5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (320 versus 230) out of a single battery charge.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (3 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the E-M10 is the clear winner of the contest (11 : 5 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.

GM1 05:11 E-M10

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the GM1 or the E-M10. 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. 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. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GM1 (⇒ rgt) Rec 78/100 Gold 5/5 4.5/5 4.5/5 2013 749discont. check
Olympus E-M10 (⇒ lft) - 80/100 Gold 5/5 4.5/5 5/5 2014 699discont. check
Canon G1 X Mark II (⇒ lft | rgt) Rec 77/100 Silver 4/5 4/5 4.5/5 2014 799 latest check
Olympus E-M10 III (⇒ lft | rgt) Rec 80/100 4.5/5 .. 4.5/5 2017 649 latest 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-M1 (⇒ lft | rgt) HiRec 84/100 Gold 4.5/5 4.5/5 4.5/5 2013 1,399discont. check
Olympus E-P5 (⇒ lft | rgt) HiRec 78/100 Silver 4.5/5 4.5/5 5/5 2013 999discont. check
Panasonic GX85 (⇒ lft | rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest check
Panasonic G7 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4.5/5 4.5/5 2015 649discont. check
Panasonic FZ1000 (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 4.5/5 2014 899discont. check
Panasonic GH4 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 5/5 5/5 2014 1,499discont. check
Panasonic GM5 (⇒ lft | rgt) Rec 77/100 Silver 5/5 5/5 4.5/5 2014 749discont. check
Panasonic LX100 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 4/5 5/5 2014 899 latest check
Panasonic G6 (⇒ lft | rgt) HiRec - 5/5 - 4.5/5 2013 599discont. check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check

The review scores listed above should be treated 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. 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 comparisons

If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If you do not see the camera that you are looking for, please contact me, and I will try to locate and add the respective data to the application.

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