Panasonic GX7 versus Olympus E-M1 II
The Panasonic Lumix DMC-GX7 and the Olympus OM-D E-M1 Mark II are two enthusiast cameras that were revealed to the public, respectively, in August 2013 and September 2016. Both the GX7 and the E-M1 II 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 20.2 MP.
The physical size and weight of the Panasonic GX7 and the Olympus E-M1 II are illustrated 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. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the GX7 – represents the basis or 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-M1 II is notably larger (40 percent) than the Panasonic GX7. Moreover, the E-M1 II is substantially heavier (43 percent) than the GX7. It is noteworthy in this context that the E-M1 II is splash and dust-proof, while the GX7 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 comparisons there.
|Camera Body Specifications
|Panasonic GX7 (⇒ rgt)||123 mm||71 mm||55 mm||402 g||350||no||2013||999||discont.||check|
|Olympus E-M1 II (⇒ lft)||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-M5 II (⇒ lft | rgt)||124 mm||85 mm||45 mm||469 g||310||YES||2015||1,099||latest||check|
|Olympus E-M10 (⇒ lft | rgt)||119 mm||82 mm||46 mm||396 g||320||no||2014||699||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||122 mm||69 mm||37 mm||420 g||330||no||2013||999||discont.||check|
|Olympus E-M5 (⇒ lft | rgt)||122 mm||89 mm||43 mm||425 g||360||YES||2012||1,299||discont.||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 GX8 (⇒ lft | rgt)||133 mm||78 mm||63 mm||487 g||330||YES||2015||1,199||discont.||check|
|Panasonic GM5 (⇒ lft | rgt)||99 mm||60 mm||36 mm||211 g||220||no||2014||749||discont.||check|
|Panasonic LX100 (⇒ lft | rgt)||115 mm||66 mm||55 mm||393 g||300||no||2014||899||latest||check|
|Panasonic G6 (⇒ lft | rgt)||122 mm||85 mm||71 mm||390 g||340||no||2013||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||99 mm||55 mm||30 mm||204 g||230||no||2013||749||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GX7 was launched at a markedly lower price (by 50 percent) than the E-M1 II, 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.
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 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 associated with larger, more expensive camera bodies 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.
While the two cameras under review share the same sensor size, the E-M1 II offers a higher resolution of 20.2 megapixel, compared with 15.8 MP of the GX7. This megapixel advantage translates into a 13 percent gain in linear resolution. On the other hand, these sensor specs imply that the E-M1 II has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 3.77μm for the GX7). However, it should be noted that the E-M1 II is much more recent (by 3 years and 1 month) than the GX7, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that the E-M1 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
Unlike the GX7, the E-M1 II has the capacity to capture high quality composite images (50MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
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"). Of the two cameras under consideration, the E-M1 II has a markedly higher DXO score than the GX7 (overall score 10 points higher), which will translate into better image quality. The advantage is based on 1.1 bits higher color depth, 0.6 EV in additional dynamic range, and 0.9 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.
|Panasonic GX7 (⇒ rgt)||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
|Olympus E-M1 II (⇒ lft)||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-M5 II (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||23.0||12.5||842||73|
|Olympus E-M10 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||884||72|
|Olympus E-P5 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.4||895||72|
|Olympus E-M5 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60i||22.8||12.3||826||71|
|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 GX8 (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|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 GM1 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the E-M1 II provides a better video resolution than the GX7. It can shoot movie footage at 4K/30p, while the Panasonic is limited to 1080/60p.
Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GX7 offers a higher resolution than the one in the E-M1 II (2760k vs 2360k dots). The following table reports on some other key feature differences and similarities of the Panasonic GX7, the Olympus E-M1 II, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.
|Panasonic GX7 (⇒ rgt)||2760||no||3.0||1040||tilting||YES||8000||5.0||7||YES|
|Olympus E-M1 II (⇒ lft)||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-M5 II (⇒ lft | rgt)||2360||no||3.0||1037||swivel||YES||8000||10.0||no||YES|
|Olympus E-M10 (⇒ lft | rgt)||1440||no||3.0||1037||tilting||YES||4000||8.0||5.8||YES|
|Olympus E-P5 (⇒ lft | rgt)||no||no||3.0||1037||tilting||YES||8000||9.0||7||YES|
|Olympus E-M5 (⇒ lft | rgt)||1440||no||3.0||610||tilting||YES||4000||9.0||no||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 GX8 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||8000||10.0||no||YES|
|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||no||YES|
|Panasonic G6 (⇒ lft | rgt)||1440||no||3.0||1036||swivel||YES||4000||7.0||10.5||no|
|Panasonic GM1 (⇒ lft | rgt)||no||no||3.0||1036||fixed||YES||500||5.0||4||no|
The E-M1 II is a current model that online retailers, such as amazon, will have in stock. In contrast, the GX7 has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the GX7 was succeeded by the Panasonic GX85.
So what conclusions can be drawn? Which of the two cameras – the Panasonic GX7 or the Olympus E-M1 II – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.
Arguments in favor of the Panasonic Lumix DMC-GX7:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 2360k dots).
- More compact: Is smaller (123x71mm vs 134x91mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 172g or 30 percent) and hence easier to carry around.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in August 2013).
Reasons to prefer the Olympus OM-D E-M1 Mark II:
- More detail: Has more megapixels (20.2 vs 15.8MP), which boosts linear resolution by 13%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- High quality composites: Can combine several shots after pixel-shifting its sensor.
- Better image quality: Scores markedly higher (10 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.1 bits more color depth).
- 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 (0.9 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
- Faster burst: Shoots at higher frequency (18 vs 5 flaps/sec) to capture the decisive moment.
- Longer lasting: Gets more shots (440 versus 350) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- More modern: Reflects 3 years and 1 month of technical progress since the GX7 launch.
If the count of relative strengths (bullet points above) is taken as a measure, the E-M1 II is the clear winner of the contest (13 : 7 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.
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 GX7 or the E-M1 II handle or perform in practice. 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 where reviews by experts come in. 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.
|Panasonic GX7 (⇒ rgt)||Rec||79/100 Silver||5/5||4.5/5||5/5||2013||999||discont.||check|
|Olympus E-M1 II (⇒ lft)||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-M5 II (⇒ lft | rgt)||HiRec||81/100 Silver||5/5||4.5/5||5/5||2015||1,099||latest||check|
|Olympus E-M10 (⇒ lft | rgt)||-||80/100 Gold||5/5||4.5/5||5/5||2014||699||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||HiRec||78/100 Silver||4.5/5||4.5/5||5/5||2013||999||discont.||check|
|Olympus E-M5 (⇒ lft | rgt)||HiRec||80/100 Gold||4.5/5||5/5||5/5||2012||1,299||discont.||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 GX8 (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||4.5/5||2015||1,199||discont.||check|
|Panasonic GM5 (⇒ lft | rgt)||Rec||77/100 Silver||5/5||5/5||4.5/5||2014||749||discont.||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||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||Rec||78/100 Gold||5/5||4.5/5||4.5/5||2013||749||discont.||check|
The above review scores should be interpreted 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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
In case you would like to check on the differences and similarities of other camera models, just use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you do not see the camera that you are looking for, please contact me, and I will try to add information on that model to the database.
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