Olympus E-M5 versus Panasonic GX7
The Olympus OM-D E-M5 and the Panasonic Lumix DMC-GX7 are two enthusiast cameras that were revealed to the public, respectively, in February 2012 and August 2013. Both the E-M5 and the GX7 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The Olympus has a resolution of 15.9 megapixel, whereas the Panasonic provides 15.8 MP.
The physical size and weight of the Olympus E-M5 and the Panasonic GX7 are illustrated in the side-by-side display below. 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 – the E-M5 – 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 Panasonic GX7 is notably smaller (20 percent) than the Olympus E-M5. Moreover, the GX7 is slightly lighter (5 percent) than the E-M5. It is worth mentioning in this context that the E-M5 is splash and dust resistant, 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
|Olympus E-M5 (⇒ rgt)||122 mm||89 mm||43 mm||425 g||..||YES||2012||1,299||discont.||check|
|Panasonic GX7 (⇒ lft)||123 mm||71 mm||55 mm||402 g||350||no||2013||999||discont.||check|
|Olympus PEN-F (⇒ lft | rgt)||125 mm||72 mm||37 mm||427 g||330||no||2016||1,199||latest||check|
|Olympus E-M10 II (⇒ lft | rgt)||120 mm||83 mm||47 mm||390 g||320||no||2015||799||discont.||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-M1 (⇒ lft | rgt)||130 mm||94 mm||63 mm||497 g||350||YES||2013||1,399||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||122 mm||69 mm||37 mm||420 g||330||no||2013||999||discont.||check|
|Panasonic G80 (⇒ lft | rgt)||128 mm||89 mm||74 mm||505 g||330||YES||2016||899||latest||check|
|Panasonic GX8 (⇒ lft | rgt)||133 mm||78 mm||63 mm||487 g||330||YES||2015||1,199||latest||check|
|Panasonic G6 (⇒ lft | rgt)||122 mm||85 mm||71 mm||390 g||340||no||2013||599||discont.||check|
|Panasonic GH3 (⇒ lft | rgt)||133 mm||93 mm||82 mm||550 g||540||YES||2012||1,299||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 somewhat lower price (by 23 percent) than the E-M5, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the sensor inside a digital camera is one of the key determinants 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. 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 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-M5 offers a slightly higher resolution of 15.9 megapixel, compared with 15.8 MP of the GX7. This megapixel advantage translates into a 0.3 percent gain in linear resolution. On the other hand, these sensor specs imply that the E-M5 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 3.77μm for the GX7). Moreover, it should be noted that the GX7 is a somewhat more recent model (by 1 year and 5 months) than the E-M5, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of individual pixels.
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 Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar image quality. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|Olympus E-M5 (⇒ rgt)||Four Thirds||15.9||4608||3456||1080/60i||22.8||12.3||826||71|
|Panasonic GX7 (⇒ lft)||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
|Olympus PEN-F (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||1080/60p||23.1||12.4||894||74|
|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-M10 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||884||72|
|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 G80 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||4K/30p||22.8||12.5||656||71|
|Panasonic GX8 (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|Panasonic G6 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|Panasonic GH3 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||22.7||12.4||812||71|
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, but the GX7 provides a faster frame rate than the E-M5. It can shoot movie footage at 1080/60p, while the Olympus is limited to 1080/60i.
Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the GX7 offers a substantially higher resolution than the one in the E-M5 (2760k vs 1440k dots). The adjacent table lists some of the other core features of the Olympus E-M5 and Panasonic GX7 along with similar information for a selection of comparators. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.
|Olympus E-M5 (⇒ rgt)||1440||no||3.0||610||tilting||YES||4000||9.0||no||YES|
|Panasonic GX7 (⇒ lft)||2760||no||3.0||1040||tilting||YES||8000||5.0||7||YES|
|Olympus PEN-F (⇒ lft | rgt)||2360||no||3.0||1037||swivel||YES||8000||10.0||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-M10 (⇒ lft | rgt)||1440||no||3.0||1037||tilting||YES||4000||8.0||5.8||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 G80 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||4000||9.0||6.2||YES|
|Panasonic GX8 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||8000||10.0||no||YES|
|Panasonic G6 (⇒ lft | rgt)||1440||no||3.0||1036||swivel||YES||4000||7.0||10.5||no|
|Panasonic GH3 (⇒ lft | rgt)||1746||no||3.0||614||swivel||YES||4000||6.0||12||no|
Both the E-M5 and the GX7 have been discontinued, but can regularly be found used on ebay. The E-M5 was replaced by the Olympus E-M5 II, while the GX7 was followed by the Panasonic GX85.
So how do things add up? Is there a clear favorite between the Olympus E-M5 and the Olympus E-M5? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Olympus OM-D E-M5:
- Faster burst: Shoots at higher frequency (9 vs 5 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 on the market for longer (launched in February 2012).
Advantages of the Panasonic Lumix DMC-GX7:
- Better video: Provides higher movie framerates (1080/60p vs 1080/60i).
- More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 1440k dots).
- More detailed LCD: Has a higher resolution rear screen (1040k vs 610k dots).
- Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
- More compact: Is smaller (123x71mm vs 122x89mm) and will fit more readily into a bag.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was released into a lower priced segment (23 percent cheaper at launch).
- More modern: Was introduced somewhat (1 year and 5 months) more recently.
If the count of individual advantages (bullet points above) is taken as a guide, the GX7 is the clear winner of the contest (8 : 3 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.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the E-M5 or the GX7 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 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. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Olympus E-M5 (⇒ rgt)||HiRec||80/100 Gold||4.5/5||5/5||5/5||2012||1,299||discont.||check|
|Panasonic GX7 (⇒ lft)||Rec||79/100 Silver||5/5||4.5/5||5/5||2013||999||discont.||check|
|Olympus PEN-F (⇒ lft | rgt)||-||82/100 Silver||4.5/5||4.5/5||5/5||2016||1,199||latest||check|
|Olympus E-M10 II (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||5/5||5/5||2015||799||discont.||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-M1 (⇒ lft | rgt)||HiRec||84/100 Gold||4.5/5||4.5/5||4.5/5||2013||1,399||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||HiRec||78/100 Silver||4.5/5||4.5/5||5/5||2013||999||discont.||check|
|Panasonic G80 (⇒ lft | rgt)||HiRec||84/100 Gold||5/5||4.5/5||4.5/5||2016||899||latest||check|
|Panasonic GX8 (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||4.5/5||2015||1,199||latest||check|
|Panasonic G6 (⇒ lft | rgt)||HiRec||-||5/5||-||4.5/5||2013||599||discont.||check|
|Panasonic GH3 (⇒ lft | rgt)||HiRec||79/100 Gold||4.5/5||5/5||4.5/5||2012||1,299||discont.||check|
The above review scores should be interpreted 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. 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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