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Panasonic G2 vs Sony A7R III

The Panasonic Lumix DMC-G2 and the Sony Alpha A7R III are two digital cameras that were revealed to the public, respectively, in March 2010 and October 2017. Both the G2 and the A7R III are mirrorless interchangeable lens cameras that are based on a Four Thirds (G2) and a full frame (A7R III) sensor. The Panasonic has a resolution of 12 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.

Headline Specifications
Panasonic G2 versus Sony A7R III
Panasonic G2 Sony A7R III
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
12 MP, Four Thirds Sensor 42.2 MP, Full Frame Sensor
720/30p Video 4K/30p Video
ISO 100-6,400 ISO 100-32,000 (50 - 102,400)
Electronic viewfinder (1440k dots) Electronic viewfinder (3686k dots)
3.0 LCD, 460k dots 3.0 LCD, 1440k dots
Swivel touchscreen Tilting touchscreen
2.6 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
360 shots per battery charge650 shots per battery charge
124 x 84 x 74 mm, 428 g 127 x 96 x 74 mm, 650 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-G2 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.

Body comparison

An illustration of the physical size and weight of the Panasonic G2 and the Sony A7R III is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The G2 can be obtained in three different colors (black, blue, red), while the A7R III is only available in black.

Size Panasonic G2 vs Sony A7R III
Compare G2 versus A7R III top
Comparison G2 or A7R III rear

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 (17 percent) than the Panasonic G2. Moreover, the A7R III is substantially heavier (52 percent) than the G2. It is noteworthy in this context that the A7R III is splash and dust-proof, while the G2 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 (G2) 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 G2 gets 360 shots out of its DMW-BLB13 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 following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Panasonic G2 4.9 in 3.3 in 2.9 in 15.1 oz 360 n Mar 2010 599i
 
Sony A7R III 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199i
 
Nikon Z7 5.3 in 4.0 in 2.6 in 23.8 oz 330 Y Aug 2018 3,399 i
 
Olympus E-PL2 4.5 in 2.8 in 1.7 in 12.8 oz 280 n Jan 2011 599i
 
Panasonic GF5 4.3 in 2.6 in 1.5 in 9.4 oz 360 n Apr 2012 499i
 
Panasonic G3 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599i
 
Panasonic GF3 4.3 in 2.6 in 1.3 in 9.3 oz 300 n Jun 2011 549i
 
Panasonic G10 4.9 in 3.3 in 2.9 in 13.7 oz 380 n Mar 2010 499i
 
Panasonic GF2 4.4 in 2.7 in 1.3 in 10.9 oz 300 n Nov 2010 549i
 
Panasonic GH2 4.9 in 3.5 in 3.0 in 15.6 oz 330 n Sep 2010 899i
 
Panasonic GF1 4.7 in 2.8 in 1.4 in 13.6 oz 380 n Sep 2009 749i
 
Panasonic GH1 4.9 in 3.5 in 1.8 in 13.6 oz 300 n Mar 2009 899i
 
Panasonic G1 4.9 in 3.3 in 1.8 in 12.7 oz 410 n Sep 2008 599i
 
Sony A9 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499i
 
Sony A99 II 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i
 
Sony A7R II 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199i
 
Sony A7S II 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G2 was launched at a markedly lower price (by 81 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.

Sensor comparison

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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Panasonic G2 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 G2 has a native 4:3 aspect ratio, while the one in the A7R III offers a 3:2 aspect.

Panasonic G2 and Sony A7R III sensor measures

With 42.2MP, the A7R III offers a higher resolution than the G2 (12MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 4.33μm for the G2) due to its larger sensor. Moreover, the A7R III is a much more recent model (by 7 years and 7 months) than the G2, 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 G2 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 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 G2, 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-G2 has a native sensitivity range from ISO 100 to ISO 6400. 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.

G2 versus A7R III MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 G2 (overall score 47 points higher). The advantage is based on 4.8 bits higher color depth, 4.4 EV in additional dynamic range, and 2.8 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
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
 
Panasonic G2 Four Thirds 12.0 4000 3000720/30p21.210.349353
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
 
Nikon Z7 Full Frame 45.4 8256 55044K/30p26.314.6266899
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
 
Panasonic GF5 Four Thirds 12.0 4000 30001080/60i21.411.661861
 
Panasonic G3 Four Thirds 15.8 4592 34481080/60i21.010.666756
 
Panasonic GF3 Four Thirds 12.0 4000 30001080/60i20.610.045849
 
Panasonic G10 Four Thirds 12.0 4000 3000720/30p21.210.141152
 
Panasonic GF2 Four Thirds 12.0 4000 30001080/60i21.210.350654
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
 
Panasonic GF1 Four Thirds 12.0 4000 3000720/30p21.210.351354
 
Panasonic GH1 Four Thirds 12.0 4000 30001080/24p21.611.677264
 
Panasonic G1 Four Thirds 12.0 4000 3000none21.110.346353
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385

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 A7R III provides a better video resolution than the G2. It can shoot movie footage at 4K/30p, while the Panasonic is limited to 720/30p.

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 A7R III offers a substantially higher resolution than the one in the G2 (3686k vs 1440k dots). The adjacent table lists some of the other core features of the Panasonic G2 and Sony A7R III along with similar information for a selection of comparators.

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Core Features
  Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
 
Panasonic G21440 n 3.0 460 swivel Y 1/4000s 2.6 Y n
 
Sony A7R III3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
 
Nikon Z73690 Y 3.2 2100 tilting Y 1/8000s 9.0 n Y
 
Olympus E-PL2optional n 3.0 460 fixed n 1/4000s 3.0 Y Y
 
Panasonic GF5none n 3.0 920 fixed Y 1/4000s 4.0 Y n
 
Panasonic G31440 n 3.0 460 swivel Y 1/4000s 4.0 Y n
 
Panasonic GF3none n 3.0 460 fixed Y 1/4000s 3.2 Y n
 
Panasonic G10202 n 3.0 460 fixed n 1/4000s 2.6 Y n
 
Panasonic GF2optional n 3.0 460 fixed Y 1/4000s 2.6 Y n
 
Panasonic GH21534 n 3.0 460 swivel n 1/4000s 3.0 Y n
 
Panasonic GF1optional n 3.0 460 fixed n 1/4000s 3.0 Y n
 
Panasonic GH11440 n 3.0 460 swivel n 1/4000s 3.0 Y n
 
Panasonic G11440 n 3.0 460 swivel n 1/4000s 3.0 Y n
 
Sony A93686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
 
Sony A7R II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y

One difference between the cameras concerns the presence of an on-board flash. The G2 has one, while the A7R III does not. While the built-in flash of the G2 is not very powerful, it can at times be useful as a fill-in light.

The G2 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7R III 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, the A7R III is one of those camera that have an additional 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 A7R III 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 G2 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 G2 only has one slot. The A7R III supports UHS-II cards on its first slot and UHS-I on its second one, while the G2 cannot take advantage of Ultra High Speed SD cards.

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-G2 and Sony Alpha A7R 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
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
 
Panasonic G2Ystereomono--mini2.0---
 
Sony A7R IIIYstereomonoYYmicro3.1YYY
 
Nikon Z7YstereomonoYYmicro3.1Y-Y
 
Olympus E-PL2Ystereo---mini2.0---
 
Panasonic GF5-stereomono--mini2.0---
 
Panasonic G3Ystereomono--mini2.0---
 
Panasonic GF3-stereomono--mini2.0---
 
Panasonic G10Ymono---mini2.0---
 
Panasonic GF2Ystereomono--mini2.0---
 
Panasonic GH2YstereomonoY-mini2.0---
 
Panasonic GF1Ymonomono--mini2.0---
 
Panasonic GH1Ystereo-Y-mini2.0---
 
Panasonic G1Y----mini2.0---
 
Sony A9YstereomonoYYmicro2.0YYY
 
Sony A99 IIYstereomonoYYmicro2.0YYY
 
Sony A7R IIYstereomonoYYmicro2.0YY-
 
Sony A7S IIYstereomonoYYmicro2.0YY-

It is notable that the A7R III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the G2 does not provide wifi capability.

Studio photographers will appreciate that the Sony A7R III (unlike the G2) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the G2 and the A7R III have been discontinued, but can regularly be found used on eBay. The G2 was replaced by the Panasonic G3, while the A7R III was followed by the Sony A7R IV. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Sony websites.

Review summary

So what is the bottom line? Is the Panasonic G2 better than the Sony A7R III or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Panasonic Lumix DMC-G2:

  • 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 (124x84mm vs 127x96mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 222g or 34 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 (81 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in March 2010).

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Advantages of the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 12MP), which boosts linear resolution by 91%.
  • 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 (47 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (4.8 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (4.4 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.8 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 720/30p).
  • 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 (3686k vs 1440k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 460k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 2.6 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (650 versus 360) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • 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 Ultra High Speed (UHS-II and UHS-I) SDXC cards.
  • More modern: Reflects 7 years and 7 months of technical progress since the G2 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7R III is the clear winner of the contest (29 : 8 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 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.

G2 08:29 A7R III

How about other alternatives? Do the specifications of the Panasonic G2 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the G2 or the A7R III 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 hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Panasonic G2..72/1004/54/54.5/5 Mar 2010 599i
 
Sony A7R III+ +90/1004.5/55/55/5 Oct 2017 3,199i
 
Nikon Z7+89/1004.5/54.5/55/5 Aug 2018 3,399 i
 
Olympus E-PL283/10071/1004.5/54.5/54.5/5 Jan 2011 599i
 
Panasonic GF5....4.5/54/54.5/5 Apr 2012 499i
 
Panasonic G3+ +75/1004.5/54.5/55/5 May 2011 599i
 
Panasonic GF382/10071/1004.5/54.5/54/5 Jun 2011 549i
 
Panasonic G10..70/1004/5..4/5 Mar 2010 499i
 
Panasonic GF282/10070/1004.5/54.5/54.5/5 Nov 2010 549i
 
Panasonic GH2+ +79/1004.5/54.5/55/5 Sep 2010 899i
 
Panasonic GF185/10069/1004.5/54.5/54.5/5 Sep 2009 749i
 
Panasonic GH1+ +72/1004.5/55/54.5/5 Mar 2009 899i
 
Panasonic G1+ +70/1004/54.5/54.5/5 Sep 2008 599i
 
Sony A9+ +89/1005/55/55/5 Apr 2017 4,499i
 
Sony A99 II..85/1004.5/54.5/54.5/5 Sep 2016 3,199 i
 
Sony A7R II+ +90/1005/54.5/55/5 Jun 2015 3,199i
 
Sony A7S II+..4.5/55/55/5 Sep 2015 2,999i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Panasonic G2:
Check Ebay offers
Sony A7R III:
Check Ebay offers

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 your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic G2 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 Specifications
    Camera Model Panasonic G2 Sony A7R III
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date March 2010 October 2017
    Launch Price USD 599 USD 3,199
    Sensor Specs Panasonic G2 Sony A7R III
    Sensor Technology CMOS BSI-CMOS
    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
    Crop Factor 2.0x 1.0x
    Sensor Resolution 12 Megapixels 42.2 Megapixels
    Image Resolution 4000 x 3000 pixels 7952 x 5304 pixels
    Pixel Pitch 4.33 μm 4.52 μm
    Pixel Density 5.34 MP/cm2 4.90 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 720/30p Video 4K/30p Video
    ISO Setting 100 - 6,400 ISO 100 - 32,000 ISO
    ISO Boost no Enhancement 50 - 102,400 ISO
    Image Processor Venus HD II BIONZ X
    DXO Sensor Quality (score) 53 100
    DXO Color Depth (bits) 21.2 26.0
    DXO Dynamic Range (EV) 10.3 14.7
    DXO Low Light (ISO) 493 3523
    Screen Specs Panasonic G2 Sony A7R III
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x 0.78x
    Viewfinder Resolution 1440k dots 3686k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 460k dots 1440k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Panasonic G2 Sony A7R III
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 2.6 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support no Single UHS-II
    Connectivity Specs Panasonic G2 Sony A7R III
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 3.1
    HDMI Port mini HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Panasonic G2 Sony A7R III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type DMW-BLB13 NP-FZ100
    Battery Life (CIPA)360 shots per charge650 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 124 x 84 x 74 mm
    (4.9 x 3.3 x 2.9 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 428 g (15.1 oz) 650 g (22.9 oz)

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