Panasonic GX85 versus Panasonic GX8
The Panasonic Lumix DMC-GX85 (called Panasonic GX80 in some regions) and the Panasonic Lumix DMC-GX8 are two digital cameras that were officially introduced, respectively, in April 2016 and July 2015. Both the GX85 and the GX8 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The GX85 has a resolution of 15.8 megapixel, whereas the GX8 provides 20.2 MP.
The physical size and weight of the Panasonic GX85 and the Panasonic GX8 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 GX85 – represents 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 GX8 is notably larger (20 percent) than the Panasonic GX85. Moreover, the GX8 is markedly heavier (14 percent) than the GX85. It is noteworthy in this context that the GX8 is splash and dust-proof, while the GX85 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 GX85 (⇒ rgt)||122 mm||71 mm||44 mm||426 g||290||no||2016||799||latest||check|
|Panasonic GX8 (⇒ lft)||133 mm||78 mm||63 mm||487 g||330||YES||2015||1,199||discont.||check|
|Olympus E-M1 II (⇒ lft | rgt)||134 mm||91 mm||67 mm||574 g||440||YES||2016||1,999||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|
|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 ZS100 (⇒ lft | rgt)||111 mm||65 mm||44 mm||312 g||300||no||2016||699||discont.||check|
|Panasonic G7 (⇒ lft | rgt)||125 mm||86 mm||77 mm||410 g||350||no||2015||649||discont.||check|
|Panasonic GM5 (⇒ lft | rgt)||99 mm||60 mm||36 mm||211 g||220||no||2014||749||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||99 mm||55 mm||30 mm||204 g||230||no||2013||749||discont.||check|
|Panasonic GX7 (⇒ lft | rgt)||123 mm||71 mm||55 mm||402 g||350||no||2013||999||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GX85 was launched at a markedly lower price (by 33 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.
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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 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.
While the two cameras under review share the same sensor size, the GX8 offers a higher resolution of 20.2 megapixel, compared with 15.8 MP of the GX85. 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 3.77μm for the GX85). Moreover, it should be noted, that the GX85 is a somewhat more recent model (by 8 months) than the GX8, and its sensor might 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 GX85 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 GX8 has a markedly higher DXO score than the GX85 (overall score 4 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, and 0.3 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 GX85 (⇒ rgt)||Four Thirds||15.8||4592||3448||4K/30p||22.9||12.6||662||71|
|Panasonic GX8 (⇒ lft)||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|Olympus E-M1 II (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|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|
|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 ZS100 (⇒ lft | rgt)||1-inch||20.0||5472||3648||4K/30p||22.8||12.5||559||70|
|Panasonic G7 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||4K/30p||-||-||-||-|
|Panasonic GM5 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||1080/60p||22.1||11.7||721||66|
|Panasonic GM1 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
|Panasonic GX7 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (4K/30p).
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 GX85 offers a higher resolution than the one in the GX8 (2765k vs 2360k dots). The adjacent table lists some of the other core features of the Panasonic GX85 and Panasonic GX8 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.
|Panasonic GX85 (⇒ rgt)||2765||no||3.0||1040||tilting||YES||4000||8.0||6||YES|
|Panasonic GX8 (⇒ lft)||2360||no||3.0||1040||swivel||YES||8000||10.0||no||YES|
|Olympus E-M1 II (⇒ lft | rgt)||2360||no||3.0||1037||swivel||YES||8000||18.0||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|
|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 ZS100 (⇒ lft | rgt)||1166||no||3.0||1040||fixed||YES||2000||10.0||YES||YES|
|Panasonic G7 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||4000||7.0||9.3||no|
|Panasonic GM5 (⇒ lft | rgt)||1166||no||3.0||921||fixed||YES||500||5.8||no||no|
|Panasonic GM1 (⇒ lft | rgt)||no||no||3.0||1036||fixed||YES||500||5.0||4||no|
|Panasonic GX7 (⇒ lft | rgt)||2760||no||3.0||1040||tilting||YES||8000||5.0||7||YES|
The GX85 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.
So what is the bottom line? Is the Panasonic GX85 better than the Panasonic GX8 or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Panasonic Lumix DMC-GX85:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- More detailed viewfinder: Has higher resolution electronic viewfinder (2765k vs 2360k dots).
- More compact: Is smaller (122x71mm vs 133x78mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 61g or 13 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 (33 percent cheaper at launch).
- More modern: Is somewhat more recent (announced 8 months after the GX8).
Arguments in favor of the Panasonic Lumix DMC-GX8:
- More detail: Has more megapixels (20.2 vs 15.8MP), which boosts linear resolution by 13%.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
- 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 flaps/sec) to capture the decisive moment.
- Longer lasting: Gets more shots (330 versus 290) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- More heavily discounted: Has been on the market for longer (launched in July 2015).
If the count of relative strengths (bullet points above) is taken as a measure, the GX8 emerges as the winner of the match-up (9 : 7 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 specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the GX85 or the GX8. 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. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Panasonic GX85 (⇒ rgt)||HiRec||82/100 Silver||5/5||4.5/5||5/5||2016||799||latest||check|
|Panasonic GX8 (⇒ lft)||Rec||82/100 Silver||4.5/5||5/5||4.5/5||2015||1,199||discont.||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 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|
|Panasonic GX9 (⇒ lft | rgt)||..||..||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 ZS100 (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||4/5||4.5/5||2016||699||discont.||check|
|Panasonic G7 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4.5/5||4.5/5||2015||649||discont.||check|
|Panasonic GM5 (⇒ lft | rgt)||Rec||77/100 Silver||5/5||5/5||4.5/5||2014||749||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||Rec||78/100 Gold||5/5||4.5/5||4.5/5||2013||749||discont.||check|
|Panasonic GX7 (⇒ lft | rgt)||Rec||79/100 Silver||5/5||4.5/5||5/5||2013||999||discont.||check|
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
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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