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Sony A7 III vs Panasonic GX7

The Sony Alpha A7 III and the Panasonic Lumix DMC-GX7 are two enthusiast cameras that were officially introduced, respectively, in February 2018 and August 2013. Both the A7 III and the GX7 are mirrorless interchangeable lens cameras that are based on a full frame (A7 III) and a Four Thirds (GX7) sensor. The Sony has a resolution of 24 megapixels, whereas the Panasonic provides 15.8 MP.

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

Headline Specifications
Sony A7 III
versus
Panasonic GX7
Sony A7 III   Panasonic GX7
Mirrorless system camera Mirrorless system camera
Sony E mount lenses Micro Four Thirds lenses
24 MP – Full Frame sensor 15.8 MP – Four Thirds sensor
4K/30p Video 1080/60p Video
ISO 100-51,200 (50 - 204,800) ISO 125-25,600
Electronic viewfinder (2359k dots) Electronic viewfinder (2760k dots)
3.0" LCD – 922k dots 3.0" LCD – 1040k dots
Tilting touchscreen Tilting touchscreen
10 shutter flaps per second 5 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodynot weather sealed
610 shots per battery charge350 shots per battery charge
127 x 96 x 74 mm, 650 g 123 x 71 x 55 mm, 402 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7 III and the Panasonic Lumix DMC-GX7? 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 side-by-side display below illustrates the physical size and weight of the Sony A7 III and the Panasonic GX7. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The GX7 can be obtained in two different colors (black, silver), while the A7 III is only available in black.

Size Sony A7 III vs Panasonic GX7
Compare A7 III versus GX7 top
Comparison A7 III or GX7 rear

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 (28 percent) than the Sony A7 III. Moreover, the GX7 is substantially lighter (38 percent) than the A7 III. It is worth mentioning in this context that the A7 III 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. 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 Sony FE Lens Catalog (A7 III) and the Micro Four Thirds Lens Catalog (GX7). 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 A7 III gets 610 shots out of its Sony NP-FZ100 battery, while the GX7 can take 350 images on a single charge of its Panasonic DMW-BLG10 power pack. The power pack in the A7 III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 1,999 amazon.com
2.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
3.
 
Canon 6D Mark II 144 mm 111 mm 75 mm 765 g 1200 Y Jun 2017 1,999 amazon.com
4.
 
Nikon Z6 134 mm 101 mm 67 mm 675 g 310 Y Aug 2018 1,999ebay.com
5.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999ebay.com
6.
 
Olympus E-PL7 115 mm 67 mm 38 mm 357 g 350 n Aug 2014 599ebay.com
7.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
8.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
9.
 
Panasonic GX85 122 mm 71 mm 44 mm 426 g 290 n Apr 2016 799 amazon.com
10.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
11.
 
Sony A7 IV 131 mm 96 mm 80 mm 659 g 580 Y Oct 2021 2,499 amazon.com
12.
 
Sony A7C 124 mm 71 mm 60 mm 509 g 740 Y Sep 2020 1,799 amazon.com
13.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
14.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 3,199 amazon.com
15.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
16.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499ebay.com
17.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 amazon.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 GX7 was launched at a markedly lower price (by 50 percent) than the A7 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.

Sensor comparison

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. 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 tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony A7 III features a full frame sensor and the Panasonic GX7 a Four Thirds sensor. The sensor area in the GX7 is 73 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the A7 III has a native 3:2 aspect ratio, while the one in the GX7 offers a 4:3 aspect.

Sony A7 III and Panasonic GX7 sensor measures

With 24MP, the A7 III offers a higher resolution than the GX7 (15.8MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.77μm for the GX7) due to its larger sensor. Moreover, the A7 III is a much more recent model (by 4 years and 6 months) than the GX7, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Sony A7 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Panasonic GX7 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.

The A7 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Sony Alpha A7 III has a native sensitivity range from ISO 100 to ISO 51200, which can be extended to ISO 50-204800. The corresponding ISO settings for the Panasonic Lumix DMC-GX7 are ISO 125 to ISO 25600 (no boost).

In terms of underlying technology, the A7 III is build around a BSI-CMOS sensor, while the GX7 uses a 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.

A7 III versus GX7 MP

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 review, the A7 III provides substantially higher image quality than the GX7, with an overall score that is 26 points higher. This advantage is based on 2.4 bits higher color depth, 2.5 EV in additional dynamic range, and 2.4 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
2.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
3.
 
Canon 6D Mark II Full Frame 26.0 6240 41601080/60p24.411.9286285
4.
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
5.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
6.
 
Olympus E-PL7 Four Thirds 15.9 4608 34561080/30p22.712.487372
7.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
8.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
9.
 
Panasonic GX85 Four Thirds 15.8 4592 34484K/30p22.912.666271
10.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
11.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
12.
 
Sony A7C Full Frame 24.0 6000 40004K/30p25.014.7340795
13.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
14.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
15.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
16.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
17.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7 III provides a higher video resolution than the GX7. It can shoot video footage at 4K/30p, while the Panasonic is limited to 1080/60p.

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Feature comparison

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 higher resolution than the one in the A7 III (2760k vs 2359k dots). The table below summarizes some of the other core capabilities of the Sony A7 III and Panasonic GX7 in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty 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.
 
Sony A7 III2359 n3.0 / 922 tilting Y 1/8000s 10.0/s n Y
2.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
3.
 
Canon 6D Mark IIoptical Y3.0 / 1040 swivel Y 1/4000s 6.5/s n n
4.
 
Nikon Z63690 Y3.2 / 2100 tilting Y 1/8000s 12.0/s n Y
5.
 
Olympus E-P5optional n3.0 / 1037 tilting Y 1/8000s 9.0/s Y Y
6.
 
Olympus E-PL7optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
7.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
8.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
9.
 
Panasonic GX852765 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
10.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
11.
 
Sony A7 IV3686 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
12.
 
Sony A7C2360 n3.0 / 922 swivel Y 1/4000s 10.0/s n Y
13.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
14.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
17.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The GX7 has one, while the A7 III does not. While the built-in flash of the GX7 is not very powerful, it can at times be useful as a fill-in light.

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 Sony A7 III and the Panasonic GX7 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 A7 III writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the GX7 uses SDXC cards. The A7 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX7 only has one slot. The A7 III supports UHS-II cards (on its first slot), while the GX7 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 Sony Alpha A7 III and Panasonic Lumix DMC-GX7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A7 IIIYstereo / monoYYmicro3.1YYY
2.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
3.
 
Canon 6D Mark IIYstereo / monoY-mini2.0YYY
4.
 
Nikon Z6Ystereo / monoYYmicro3.1Y-Y
5.
 
Olympus E-P5Ystereo / mono--micro2.0Y--
6.
 
Olympus E-PL7Ystereo / mono--micro2.0Y--
7.
 
Panasonic G5Ystereo / mono--mini2.0---
8.
 
Panasonic GH2Ystereo / monoY-mini2.0---
9.
 
Panasonic GX85Ystereo / mono--micro2.0Y--
10.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
11.
 
Sony A7 IVYstereo / monoYYfull3.2Y-Y
12.
 
Sony A7CYstereo / monoYYmicro3.2YYY
13.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
14.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
15.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
16.
 
Sony A9Ystereo / monoYYmicro2.0YYY
17.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY

It is notable that the A7 III has a microphone port, which is missing on the GX7. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.

The A7 III is a recent model that features in the current product line-up of Sony. In contrast, the GX7 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the GX7 was succeeded by the Panasonic GX85. Further information on the features and operation of the A7 III and GX7 can be found, respectively, in the Sony A7 III Manual (free pdf) or the online Panasonic GX7 Manual.

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Review summary

So what conclusions can be drawn? Which of the two cameras – the Sony A7 III or the Panasonic GX7 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Sony Alpha A7 III:

  • More detail: Offers more megapixels (24 vs 15.8MP) with a 26% higher linear resolution.
  • Better image quality: Scores substantially higher (26 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (2.4 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (2.5 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (2.4 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • 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.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • Faster burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Can take more shots (610 versus 350) on a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • 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 6 months of technical progress since the GX7 launch.

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Advantages of the Panasonic Lumix DMC-GX7:

  • More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 2359k dots).
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
  • More compact: Is smaller (123x71mm vs 127x96mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 248g or 38 percent) and is thus easier to take along.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in August 2013).

If the count of individual advantages (bullet points above) is taken as a guide, the A7 III is the clear winner of the match-up (19 : 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 before making a camera decision. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A7 III 19:07 GX7

How about other alternatives? Do the specifications of the Sony A7 III and the Panasonic GX7 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 A7 III or the GX7 perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A7 III..+ +4.5/589/1005/55/5 Feb 2018 1,999 amazon.com
2.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
3.
 
Canon 6D Mark II4/5+4/580/1004.5/54/5 Jun 2017 1,999 amazon.com
4.
 
Nikon Z65/5..5/589/1004.5/55/5 Aug 2018 1,999ebay.com
5.
 
Olympus E-P55/5+ +..78/1004.5/55/5 May 2013 999ebay.com
6.
 
Olympus E-PL74/5+....5/54/5 Aug 2014 599ebay.com
7.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
8.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
9.
 
Panasonic GX854.5/5+ +..82/1005/55/5 Apr 2016 799 amazon.com
10.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
11.
 
Sony A7 IV5/5+ +4.5/589/1004.5/54.5/5 Oct 2021 2,499 amazon.com
12.
 
Sony A7C3.5/5..3.5/586/1004/54/5 Sep 2020 1,799 amazon.com
13.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
14.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 3,199 amazon.com
15.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
16.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 4,499ebay.com
17.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 4,499 amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated 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. A score, therefore, has to be seen in close connection to the price and market introduction time 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. Also, please note that some of the review sites have changed their methodology and reporting over time.

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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 make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Sony A7 III vs Panasonic GX7

    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 Sony A7 III Panasonic GX7
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Sony E mount lenses Micro Four Thirds lenses
    Launch Date February 2018 August 2013
    Launch Price USD 1,999 USD 999
    Sensor Specs Sony A7 III Panasonic GX7
    Sensor Technology BSI-CMOS CMOS
    Sensor Format Full Frame Sensor Four Thirds Sensor
    Sensor Size 35.6 x 23.8 mm 17.3 x 13.0 mm
    Sensor Area 847.28 mm2 224.9 mm2
    Sensor Diagonal 42.8 mm 21.6 mm
    Crop Factor 1.0x 2.0x
    Sensor Resolution 24 Megapixels 15.8 Megapixels
    Image Resolution 6000 x 4000 pixels 4592 x 3448 pixels
    Pixel Pitch 5.94 μm 3.77 μm
    Pixel Density 2.83 MP/cm2 7.04 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 4K/30p Video 1080/60p Video
    ISO Setting 100 - 51,200 ISO 125 - 25,600 ISO
    ISO Boost 50 - 204,800 ISO no Enhancement
    Image Processor BIONZ X Venus
    DXO Sensor Quality (score) 96 70
    DXO Color Depth (bits) 25.0 22.6
    DXO Dynamic Range (EV) 14.7 12.2
    DXO Low Light (ISO) 3730 718
    Screen Specs Sony A7 III Panasonic GX7
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.78x 0.70x
    Viewfinder Resolution 2359k dots 2760k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 922k dots 1040k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Sony A7 III Panasonic GX7
    Focus System On-Sensor Phase-detect Contrast-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 10 shutter flaps/s 5 shutter flaps/s
    Electronic ShutterYESup to 1/8000s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium MS or SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support Single UHS-II UHS-I
    Connectivity Specs Sony A7 III Panasonic GX7
    External Flash Hotshoe Hotshoe
    USB Connector USB 3.1 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in NFC built-in
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Sony A7 III Panasonic GX7
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Sony NP-FZ100 Panasonic DMW-BLG10
    Battery Life (CIPA)610 shots per charge350 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    123 x 71 x 55 mm
    (4.8 x 2.8 x 2.2 in)
    Camera Weight 650 g (22.9 oz) 402 g (14.2 oz)
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