Panasonic GX8 vs Sony A7R III
The Panasonic Lumix DMC-GX8 and the Sony Alpha A7R III are two enthusiast cameras that were announced, respectively, in July 2015 and October 2017. Both the GX8 and the A7R III are mirrorless interchangeable lens cameras that are based on a Four Thirds (GX8) and a full frame (A7R III) sensor. The Panasonic has a resolution of 20.2 megapixels, whereas the Sony provides 42.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GX8 and the Sony Alpha A7R III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
The side-by-side display below illustrates the physical size and weight of the Panasonic GX8 and the Sony A7R III. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.
The GX8 can be obtained in two different colors (black, silver), while the A7R III is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is notably larger (18 percent) than the Panasonic GX8. Moreover, the A7R III is markedly heavier (33 percent) than the GX8. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (GX8) and the Sony FE Lens Catalog (A7R III). 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.
Concerning battery life, the GX8 gets 330 shots out of its DMW-BLC12 battery, while the A7R III can take 650 images on a single charge of its NP-FZ100 power pack. The power pack in the A7R III can be charged via the USB port, which can be very convenient when travelling.
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, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Panasonic GX8||133 mm||78 mm||63 mm||487 g||330||Y||Jul 2015||1,199||ebay.com|
|2.||Sony A7R III||127 mm||96 mm||74 mm||650 g||650||Y||Oct 2017||3,199||ebay.com|
|3.||Olympus E-M1 II||134 mm||91 mm||67 mm||574 g||440||Y||Sep 2016||1,999||ebay.com|
|4.||Olympus PEN-F||125 mm||72 mm||37 mm||427 g||330||n||Jan 2016||1,199||ebay.com|
|5.||Olympus E-M5 II||124 mm||85 mm||45 mm||469 g||310||Y||Feb 2015||1,099||ebay.com|
|6.||Panasonic G90||130 mm||94 mm||77 mm||536 g||290||Y||Apr 2019||999||amazon.com|
|7.||Panasonic GX9||124 mm||72 mm||47 mm||407 g||260||n||Feb 2018||849||amazon.com|
|8.||Panasonic GH5||139 mm||98 mm||87 mm||725 g||410||Y||Jan 2017||1,999||ebay.com|
|9.||Panasonic G80||128 mm||89 mm||74 mm||505 g||330||Y||Sep 2016||899||ebay.com|
|10.||Panasonic GX7||123 mm||71 mm||55 mm||402 g||350||n||Aug 2013||999||ebay.com|
|11.||Sony A7 III||127 mm||96 mm||74 mm||650 g||610||Y||Feb 2018||1,999||amazon.com|
|12.||Sony A9||127 mm||96 mm||63 mm||673 g||650||Y||Apr 2017||4,499||ebay.com|
|13.||Sony A99 II||143 mm||104 mm||76 mm||849 g||490||Y||Sep 2016||3,199||ebay.com|
|14.||Sony A6300||120 mm||67 mm||49 mm||404 g||400||Y||Feb 2016||999||ebay.com|
|15.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399||ebay.com|
|16.||Sony A7R II||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999||ebay.com|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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 GX8 was launched at a markedly lower price (by 63 percent) than the A7R III, 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 size of the sensor inside a digital camera is one of the key determinants 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. 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 tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Panasonic GX8 features a Four Thirds sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 283 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the GX8 has a native 4:3 aspect ratio, while the one in the A7R III offers a 3:2 aspect.
With 42.2MP, the A7R III offers a higher resolution than the GX8 (20.2MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.34μm for the GX8) due to its larger sensor. Moreover, the A7R III is a much more recent model (by 2 years and 3 months) than the GX8, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A7R III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Sony A7R III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Panasonic GX8 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.
The A7R III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Unlike the GX8, the A7R III has the capacity to capture high quality composite images 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).
The Panasonic Lumix DMC-GX8 has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Sony Alpha A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.
In terms of underlying technology, the GX8 is build around a CMOS sensor, while the A7R III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
Consistent information on actual sensor performance is available from DXO Mark for many 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. Of the two cameras under consideration, the A7R III offers substantially better image quality than the GX8 (overall score 25 points higher). The advantage is based on 2.5 bits higher color depth, 2.1 EV in additional dynamic range, and 2.1 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|1.||Panasonic GX8||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|2.||Sony A7R III||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|3.||Olympus E-M1 II||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|4.||Olympus PEN-F||Four Thirds||20.2||5184||3888||1080/60p||23.1||12.4||894||74|
|5.||Olympus E-M5 II||Four Thirds||15.9||4608||3456||1080/60p||23.0||12.5||842||73|
|6.||Panasonic G90||Four Thirds||20.2||5184||3888||4K/30p||23.2||13.0||1273||75|
|7.||Panasonic GX9||Four Thirds||20.2||5184||3888||4K/30p||23.1||12.8||1163||74|
|8.||Panasonic GH5||Four Thirds||20.2||5184||3888||4K/60p||23.9||13.0||807||77|
|9.||Panasonic G80||Four Thirds||15.8||4592||3448||4K/30p||22.8||12.5||656||71|
|10.||Panasonic GX7||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
|11.||Sony A7 III||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|12.||Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|13.||Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|16.||Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|17.||Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Note: DXO values in italics represent estimates based on sensor size and age.|
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, 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 review are similar with respect to both having an electronic viewfinder. However, the one in the A7R III offers a substantially higher resolution than the one in the GX8 (3686k vs 2360k dots). The table below summarizes some of the other core capabilities of the Panasonic GX8 and Sony A7R III in connection with corresponding information for a sample of similar cameras.
|1.||Panasonic GX8||2360||n||3.0 / 1040||swivel||Y||1/8000s||10.0/s||n||Y|
|2.||Sony A7R III||3686||n||3.0 / 1440||tilting||Y||1/8000s||10.0/s||n||Y|
|3.||Olympus E-M1 II||2360||n||3.0 / 1037||swivel||Y||1/8000s||18.0/s||n||Y|
|4.||Olympus PEN-F||2360||n||3.0 / 1037||swivel||Y||1/8000s||10.0/s||n||Y|
|5.||Olympus E-M5 II||2360||n||3.0 / 1037||swivel||Y||1/8000s||10.0/s||n||Y|
|6.||Panasonic G90||2360||n||3.0 / 1240||swivel||Y||1/4000s||9.0/s||Y||Y|
|7.||Panasonic GX9||2760||n||3.0 / 1240||tilting||Y||1/4000s||9.0/s||Y||Y|
|8.||Panasonic GH5||3680||n||3.2 / 1620||swivel||Y||1/8000s||12.0/s||n||Y|
|9.||Panasonic G80||2360||n||3.0 / 1040||swivel||Y||1/4000s||9.0/s||Y||Y|
|10.||Panasonic GX7||2760||n||3.0 / 1040||tilting||Y||1/8000s||5.0/s||Y||Y|
|11.||Sony A7 III||2359||n||3.0 / 922||tilting||Y||1/8000s||10.0/s||n||Y|
|12.||Sony A9||3686||n||3.0 / 1440||tilting||Y||1/8000s||20.0/s||n||Y|
|13.||Sony A99 II||2400||Y||3.0 / 1229||full-flex||n||1/8000s||12.0/s||n||Y|
|14.||Sony A6300||2359||n||3.0 / 922||tilting||n||1/4000s||11.0/s||Y||n|
|15.||Sony A6500||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0/s||Y||Y|
|16.||Sony A7R II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|17.||Sony A7S II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, both cameras under consideration feature an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The Panasonic GX8 and the Sony A7R III both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The GX8 writes its imaging data to SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. The A7R III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX8 only has one slot. The A7R III supports UHS-II cards (on its first slot), while the GX8 can use UHS-I cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Panasonic Lumix DMC-GX8 and Sony Alpha A7R III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Panasonic GX8||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|2.||Sony A7R III||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|3.||Olympus E-M1 II||Y||stereo / mono||Y||Y||micro||3.0||Y||-||-|
|4.||Olympus PEN-F||Y||stereo / mono||-||-||micro||2.0||Y||-||-|
|5.||Olympus E-M5 II||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|6.||Panasonic G90||Y||stereo / mono||Y||Y||micro||2.0||Y||-||Y|
|7.||Panasonic GX9||Y||stereo / mono||-||-||micro||2.0||Y||-||Y|
|8.||Panasonic GH5||Y||stereo / mono||Y||Y||full||3.1||Y||-||Y|
|9.||Panasonic G80||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|10.||Panasonic GX7||Y||stereo / mono||-||-||mini||2.0||Y||Y||-|
|11.||Sony A7 III||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|12.||Sony A9||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||Y|
|13.||Sony A99 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||Y|
|14.||Sony A6300||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|15.||Sony A6500||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|16.||Sony A7R II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony A7S II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the A7R III has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The GX8 lacks such a headphone port.
Studio photographers will appreciate that the Sony A7R III (unlike the GX8) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the GX8 and the A7R III have been discontinued, but can regularly be found used on ebay. The GX8 was replaced by the Panasonic GX9, while the A7R III was followed by the Sony A7R IV. Further information on the features and operation of the GX8 and A7R III can be found, respectively, in the Panasonic GX8 Manual (free pdf) or the online Sony A7R III Manual.
So what is the bottom line? Which of the two cameras – the Panasonic GX8 or the Sony A7R III – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Advantages of the Panasonic Lumix DMC-GX8:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- More compact: Is smaller (133x78mm vs 127x96mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 163g or 25 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced category (63 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in July 2015).
Reasons to prefer the Sony Alpha A7R III:
- More detail: Has more megapixels (42.2 vs 20.2MP), which boosts linear resolution by 48%.
- 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 substantially higher (25 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.5 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (2.1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (2.1 stops ISO advantage).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 2360k dots).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.77x).
- More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
- Longer lasting: Gets more shots (650 versus 330) out of a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
- More modern: Reflects 2 years and 3 months of technical progress since the GX8 launch.
If the count of individual advantages (bullet points above) is taken as a guide, the A7R III is the clear winner of the contest (20 : 7 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 when reflecting and deciding on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Panasonic GX8 and the Sony A7R III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.
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 shooting experience and imaging performance when actually working with the GX8 or the A7R III. 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 expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|1.||Panasonic GX8||5/5||+||..||82/100||4.5/5||4.5/5||Jul 2015||1,199||ebay.com|
|2.||Sony A7R III||..||+ +||4/5||90/100||4.5/5||5/5||Oct 2017||3,199||ebay.com|
|3.||Olympus E-M1 II||5/5||+ +||5/5||85/100||4.5/5||4.5/5||Sep 2016||1,999||ebay.com|
|4.||Olympus PEN-F||..||..||4/5||82/100||4.5/5||5/5||Jan 2016||1,199||ebay.com|
|5.||Olympus E-M5 II||5/5||+ +||4.5/5||81/100||5/5||5/5||Feb 2015||1,099||ebay.com|
|6.||Panasonic G90||4.5/5||+||4.5/5||83/100||4.5/5||4.5/5||Apr 2019||999||amazon.com|
|7.||Panasonic GX9||4/5||+||4/5||84/100||4.5/5||4.5/5||Feb 2018||849||amazon.com|
|8.||Panasonic GH5||4.5/5||+ +||..||85/100||4.5/5||5/5||Jan 2017||1,999||ebay.com|
|9.||Panasonic G80||..||+ +||..||84/100||5/5||4.5/5||Sep 2016||899||ebay.com|
|10.||Panasonic GX7||4/5||+||..||79/100||5/5||5/5||Aug 2013||999||ebay.com|
|11.||Sony A7 III||..||+ +||4.5/5||89/100||5/5||5/5||Feb 2018||1,999||amazon.com|
|12.||Sony A9||5/5||+ +||4.8/5||89/100||5/5||5/5||Apr 2017||4,499||ebay.com|
|13.||Sony A99 II||..||..||4.5/5||85/100||4.5/5||4.5/5||Sep 2016||3,199||ebay.com|
|14.||Sony A6300||4.5/5||+||..||85/100||5/5||5/5||Feb 2016||999||ebay.com|
|15.||Sony A6500||5/5||+ +||3.5/5||85/100||4.5/5||4.5/5||Oct 2016||1,399||ebay.com|
|16.||Sony A7R II||5/5||+ +||5/5||90/100||5/5||5/5||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||5/5||+||..||..||4.5/5||5/5||Sep 2015||2,999||ebay.com|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price 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. 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 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.
- Canon 5D Mark IV vs Sony A7R III
- Canon G7 X Mark II vs Sony A7R III
- Canon R5 C vs Sony A7R III
- Canon T7 vs Sony A7R III
- Fujifilm X10 vs Panasonic GX8
- Leica V-LUX 4 vs Panasonic GX8
- Leica V-LUX Typ 114 vs Panasonic GX8
- Olympus E-PL6 vs Sony A7R III
- Panasonic GH5 vs Panasonic GX8
- Panasonic GX1 vs Sony A7R III
- Panasonic GX8 vs Sony RX100 IV
- Panasonic GX8 vs Zeiss ZX1
Specifications: Panasonic GX8 vs Sony A7R III
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Panasonic GX8||Sony A7R III|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Micro Four Thirds lenses||Sony E mount lenses|
|Launch Date||July 2015||October 2017|
|Launch Price||USD 1,199||USD 3,199|
|Sensor Specs||Panasonic GX8||Sony A7R III|
|Sensor Format||Four Thirds Sensor||Full Frame Sensor|
|Sensor Size||17.3 x 13.0 mm||35.9 x 24.0 mm|
|Sensor Area||224.9 mm2||861.6 mm2|
|Sensor Diagonal||21.6 mm||43.2 mm|
|Sensor Resolution||20.2 Megapixels||42.2 Megapixels|
|Image Resolution||5184 x 3888 pixels||7952 x 5304 pixels|
|Pixel Pitch||3.34 μm||4.52 μm|
|Pixel Density||8.96 MP/cm2||4.90 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||4K/30p Video||4K/30p Video|
|ISO Setting||200 - 25,600 ISO||100 - 32,000 ISO|
|ISO Boost||100 - 25,600 ISO||50 - 102,400 ISO|
|Image Processor||Venus||BIONZ X|
|DXO Sensor Quality (score)||75||100|
|DXO Color Depth (bits)||23.5||26.0|
|DXO Dynamic Range (EV)||12.6||14.7|
|DXO Low Light (ISO)||806||3523|
|Screen Specs||Panasonic GX8||Sony A7R III|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2360k dots||3686k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||1440k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Shooting Specs||Panasonic GX8||Sony A7R III|
|Focus System||Contrast-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/8000s|
|Continuous Shooting||10 shutter flaps/s||10 shutter flaps/s|
|Electronic Shutter||up to 1/16000s||YES|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Single or Dual Card Slots||Single card slot||Dual card slots|
|UHS card support||UHS-I||Single UHS-II|
|Connectivity Specs||Panasonic GX8||Sony A7R III|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 3.1|
|HDMI Port||micro HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Panasonic GX8||Sony A7R III|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||330 shots per charge||650 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
133 x 78 x 63 mm
(5.2 x 3.1 x 2.5 in)
127 x 96 x 74 mm
(5.0 x 3.8 x 2.9 in)
|Camera Weight||487 g (17.2 oz)||650 g (22.9 oz)|
Did you notice an error on this page? If so, please get in touch, so that we can correct the information.