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Panasonic GX85 vs Sony A7S III

The Panasonic Lumix DMC-GX85 (called Panasonic GX80 in some regions) and the Sony Alpha 7S III are two digital cameras that were revealed to the public, respectively, in April 2016 and July 2020. Both the GX85 and the A7S III are mirrorless interchangeable lens cameras that are based on a Four Thirds (GX85) and a full frame (A7S III) sensor. The Panasonic has a resolution of 15.8 megapixels, whereas the Sony provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Panasonic GX85
versus
Sony A7S III
Panasonic GX85   Sony A7S III
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
15.8 MP – Four Thirds sensor 12 MP – Full Frame sensor
4K/30p Video 4K/120p Video
ISO 200-25,600 ISO 80-102,400 (40 - 409,600)
Electronic viewfinder (2765k dots) Electronic viewfinder (9440k dots)
3.0" LCD – 1040k dots 3.0" LCD – 1440k dots
Tilting touchscreen Swivel touchscreen
8 shutter flaps per second 10 shutter flaps per second
In-body stabilizationIn-body stabilization
not weather sealedWeathersealed body
290 shots per battery charge600 shots per battery charge
122 x 71 x 44 mm, 426 g 127 x 97 x 81 mm, 699 g
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Check GX85 price at
amazon.com
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Check A7S III price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GX85 and the Sony Alpha 7S 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.

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Body comparison

The physical size and weight of the Panasonic GX85 and the Sony A7S III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter.

The GX85 can be obtained in two different colors (black, silver), while the A7S III is only available in black.

Size Panasonic GX85 vs Sony A7S III
Compare GX85 versus A7S III top
Comparison GX85 or A7S III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S III is notably larger (42 percent) than the Panasonic GX85. Moreover, the A7S III is substantially heavier (64 percent) than the GX85. It is noteworthy in this context that the A7S III 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. 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 (GX85) and the Sony FE Lens Catalog (A7S 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 GX85 gets 290 shots out of its Panasonic DMW-BLG10 battery, while the A7S III can take 600 images on a single charge of its Sony NP-FZ100 power pack. The battery packs of both cameras can be charged via USB, 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.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GX85 122 mm 71 mm 44 mm 426 g 290 n Apr 2016 799 amazon.com
2.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 amazon.com
3.
 
Olympus E-PL8 115 mm 67 mm 38 mm 357 g 350 n Sep 2016 549ebay.com
4.
 
Olympus E-M10 II 120 mm 83 mm 47 mm 390 g 320 n Aug 2015 649ebay.com
5.
 
Olympus E-M10 119 mm 82 mm 46 mm 396 g 320 n Jan 2014 699ebay.com
6.
 
Panasonic GX9 124 mm 72 mm 47 mm 407 g 260 n Feb 2018 849ebay.com
7.
 
Panasonic G85 128 mm 89 mm 74 mm 505 g 330 Y Sep 2016 899ebay.com
8.
 
Panasonic G7 125 mm 86 mm 77 mm 410 g 350 n May 2015 649ebay.com
9.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
10.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 749ebay.com
11.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
12.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
13.
 
Sony A7R IVA 129 mm 96 mm 78 mm 665 g 670 Y Apr 2021 3,499 amazon.com
14.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 amazon.com
15.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
16.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
17.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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The price is, of course, an important factor in any camera decision. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The GX85 was launched at a markedly lower price (by 77 percent) than the A7S 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant 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. 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.

Of the two cameras under consideration, the Panasonic GX85 features a Four Thirds sensor and the Sony A7S III a full frame sensor. The sensor area in the A7S III is 276 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 GX85 has a native 4:3 aspect ratio, while the one in the A7S III offers a 3:2 aspect.

Panasonic GX85 and Sony A7S III sensor measures

Despite having a smaller sensor, the Panasonic GX85 offers a higher resolution of 15.8 megapixels, compared with 12 MP of the Sony A7S III. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 8.40μm for the A7S III). Moreover, it should be noted that the A7S III is much more recent (by 4 years and 3 months) than the GX85, 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 GX85 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Panasonic GX85 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GX85 for good quality output (200 dots per inch) amounts to 23 x 17.2 inches or 58.3 x 43.8 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.7 x 35 cm, and for excellent quality (300 dpi) 15.3 x 11.5 inches or 38.9 x 29.2 cm. The corresponding values for the Sony A7S III are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.

The A7S III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Panasonic Lumix DMC-GX85 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 7S III are ISO 80 to ISO 102400, with the possibility to increase the ISO range to 40-409600.

In terms of underlying technology, the GX85 is build around a CMOS sensor, while the A7S 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.

GX85 versus A7S III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 A7S III offers substantially better image quality than the GX85 (overall score 15 points higher). The advantage is based on 0.8 bits higher color depth, 1.3 EV in additional dynamic range, and 1.9 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.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Panasonic GX85 Four Thirds 15.8 4592 34484K/30p22.912.666271
2.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
3.
 
Olympus E-PL8 Four Thirds 15.9 4608 34561080/30p23.012.6103073
4.
 
Olympus E-M10 II Four Thirds 15.9 4608 34561080/60p23.112.584273
5.
 
Olympus E-M10 Four Thirds 15.9 4608 34561080/30p22.812.388472
6.
 
Panasonic GX9 Four Thirds 20.2 5184 38884K/30p23.112.8116374
7.
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671
8.
 
Panasonic G7 Four Thirds 15.8 4592 34484K/30p22.812.490471
9.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
10.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
11.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
12.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
13.
 
Sony A7R IVA Full Frame 60.2 9504 63364K/30p26.014.8334499
14.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
15.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
16.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
17.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7S III provides a faster frame rate than the GX85. It can shoot movie footage at 4K/120p, while the Panasonic is limited to 4K/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7S III offers a substantially higher resolution than the one in the GX85 (9440k vs 2765k dots). The adjacent table lists some of the other core features of the Panasonic GX85 and Sony A7S III along with similar information for a selection of comparators.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Panasonic GX852765 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
2.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
3.
 
Olympus E-PL8optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
4.
 
Olympus E-M10 II2360 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
5.
 
Olympus E-M101440 n3.0 / 1037 tilting Y 1/4000s 8.0/s Y Y
6.
 
Panasonic GX92760 n3.0 / 1240 tilting Y 1/4000s 9.0/s Y Y
7.
 
Panasonic G852360 n3.0 / 1040 swivel Y 1/4000s 9.0/s Y Y
8.
 
Panasonic G72360 n3.0 / 1040 swivel Y 1/4000s 7.0/s Y n
9.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
10.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
11.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
12.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
13.
 
Sony A7R IVA5760 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
14.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
15.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
17.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The GX85 has one, while the A7S III does not. While the built-in flash of the GX85 is not very powerful, it can at times be useful as a fill-in light.

The A7S III has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the GX85 does not have a selfie-screen.

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 GX85 has 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 GX85 writes its imaging data to SDXC cards, while the A7S III uses CFexpress (type A) or SDXC cards. The A7S III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX85 only has one slot. The A7S III supports UHS-II cards (on both slots), while the GX85 can use UHS-I cards.

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Connectivity comparison

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-GX85 and Sony Alpha 7S III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Panasonic GX85Ystereo / mono--micro2.0Y--
2.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
3.
 
Olympus E-PL8Ystereo / mono--micro2.0Y--
4.
 
Olympus E-M10 IIYstereo / mono--micro2.0Y--
5.
 
Olympus E-M10Ystereo / mono--micro2.0Y--
6.
 
Panasonic GX9Ystereo / mono--micro2.0Y-Y
7.
 
Panasonic G85Ystereo / monoY-micro2.0Y--
8.
 
Panasonic G7Ystereo / monoY-micro2.0Y--
9.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
10.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
11.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
12.
 
Panasonic GH2Ystereo / monoY-mini2.0---
13.
 
Sony A7R IVAYstereo / monoYYmicro3.2YYY
14.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY
15.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
16.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
17.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
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It is notable that the A7S III has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The GX85 lacks such a headphone port.

Both the GX85 and the A7S III are recent models that are part of the current product line-up. The GX85 replaced the earlier Panasonic GX7, while the A7S III followed on from the Sony A7S II. Further information on the features and operation of the GX85 and A7S III can be found, respectively, in the Panasonic GX85 Manual (free pdf) or the online Sony A7S III Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Panasonic GX85 and the Sony A7S III? Which camera is better? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GX85:

  • More detail: Offers more megapixels (15.8 vs 12MP) with a 13% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (122x71mm vs 127x97mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 273g or 39 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 (77 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in April 2016).

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Advantages of the Sony Alpha 7S III:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores substantially higher (15 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.3 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.9 stops ISO advantage).
  • Better video: Provides higher movie framerates (4K/120p versus 4K/30p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (9440k vs 2765k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.91x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
  • 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.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 8 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (600 versus 290) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • 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 4 years and 3 months of technical progress since the GX85 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7S III is the clear winner of the contest (23 : 8 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 before making a decision on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

GX85 08:23 A7S III

How about other alternatives? Do the specifications of the Panasonic GX85 and the Sony A7S 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the GX85 or the A7S III perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GX854.5/5+ +..82/1005/55/5 Apr 2016 799 amazon.com
2.
 
Sony A7S III4.5/5+ +5/591/1004.5/55/5 Jul 2020 3,499 amazon.com
3.
 
Olympus E-PL8........4.5/54/5 Sep 2016 549ebay.com
4.
 
Olympus E-M10 II4.5/5+ +..80/1005/55/5 Aug 2015 649ebay.com
5.
 
Olympus E-M104/5....80/1005/55/5 Jan 2014 699ebay.com
6.
 
Panasonic GX94/5+4/584/1004.5/54.5/5 Feb 2018 849ebay.com
7.
 
Panasonic G85..+ +..84/1005/54.5/5 Sep 2016 899ebay.com
8.
 
Panasonic G74/5+ +3.5/580/1005/54.5/5 May 2015 649ebay.com
9.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
10.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 749ebay.com
11.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
12.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
13.
 
Sony A7R IVA5/5+4.5/591/1004.5/55/5 Apr 2021 3,499 amazon.com
14.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 4,499 amazon.com
15.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
16.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
17.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Check GX85 price at
amazon.com
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Check A7S III price at
amazon.com

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just use the search menu below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Panasonic GX85 vs Sony A7S 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 Specifications
    Camera Model Panasonic GX85 Sony A7S III
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date April 2016 July 2020
    Launch Price USD 799 USD 3,499
    Sensor Specs Panasonic GX85 Sony A7S III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.6 x 23.8 mm
    Sensor Area 224.9 mm2 847.28 mm2
    Sensor Diagonal 21.6 mm 42.8 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.8 Megapixels 12 Megapixels
    Image Resolution 4592 x 3448 pixels 4240 x 2832 pixels
    Pixel Pitch 3.77 μm 8.40 μm
    Pixel Density 7.04 MP/cm2 1.42 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 4K/120p Video
    ISO Setting 200 - 25,600 ISO 80 - 102,400 ISO
    ISO Boost 100 - 25,600 ISO 40 - 409,600 ISO
    Image Processor Venus BIONZ XR
    DXO Sensor Quality (score) 71 86
    DXO Color Depth (bits) 22.9 23.7
    DXO Dynamic Range (EV) 12.6 13.9
    DXO Low Light (ISO) 662 2520
    Screen Specs Panasonic GX85 Sony A7S III
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x 0.91x
    Viewfinder Resolution 2765k dots 9440k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 1440k dots
    LCD Attachment Tilting screen Swivel screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Panasonic GX85 Sony A7S III
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 8 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterup to 1/16000sYES
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards CFexA or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Panasonic GX85 Sony A7S III
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 3.2
    HDMI Port micro HDMI full HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Panasonic GX85 Sony A7S III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Panasonic DMW-BLG10 Sony NP-FZ100
    Battery Life (CIPA)290 shots per charge600 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 122 x 71 x 44 mm
    (4.8 x 2.8 x 1.7 in)
    127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    Camera Weight 426 g (15.0 oz) 699 g (24.7 oz)
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