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Sony A7R III versus Panasonic G5

The Sony Alpha A7R III and the Panasonic Lumix DMC-G5 are two digital cameras that were officially introduced, respectively, in October 2017 and July 2012. Both the A7R III and the G5 are mirrorless interchangeable lens cameras that are based on a full frame (A7R III) and a Four Thirds (G5) sensor. The Sony has a resolution of 42.2 megapixel, whereas the Panasonic provides 15.9 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Sony A7R III vs Panasonic G5

The side-by-side display below illustrates the physical size and weight of the Sony A7R III and the Panasonic G5. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth measures are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the A7R III – represents the basis or 100 percent across all the size and weight measures).

Snapsort Sony A7R III vs Panasonic G5
Compare A7R III versus G5 top
Compare A7R III and G5 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G5 is notably smaller (18 percent) than the Sony A7R III. Moreover, the G5 is substantially lighter (39 percent) than the A7R III. It is worth mentioning in this context that the A7R III is splash and dust resistant, while the G5 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 find an overview of optics for the two cameras in the Sony FE Lens Catalog (A7R III) and the Micro Four Thirds Lens Catalog (G5). 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 A7R III gets 650 shots out of its NP-FZ100 battery, while the G5 can take 320 images on a single charge of its DMW-BLC12 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Sony A7R III» 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i
Panasonic G5« 4.7 in 3.3 in 2.8 in 14.0 oz 320 n Jul 2012 599- i
Hasselblad X1D« » 5.9 in 3.9 in 2.8 in 25.6 oz .. Y Jun 2016 8,995 i i
Panasonic GX850« » 4.2 in 2.6 in 1.3 in 9.5 oz 210 n Jan 2017 549 i i
Panasonic G7« » 4.9 in 3.4 in 3.0 in 14.5 oz 350 n May 2015 649- i
Panasonic GF6« » 4.4 in 2.6 in 1.5 in 11.4 oz 340 n Apr 2013 499- i
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i
Panasonic G3« » 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599- i
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i
Sony A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i i
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399 i i
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i
Sony A99« » 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799- i

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 G5 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Sony A7R III vs Panasonic G5

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony A7R III features a full frame sensor and the Panasonic G5 a Four Thirds sensor. The sensor area in the G5 is 74 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 A7R III has a native 3:2 aspect ratio, while the one in the G5 offers a 4:3 aspect.

Sony A7R III and Panasonic G5 sensor measures

With 42.2MP, the A7R III offers a higher resolution than the G5 (15.9MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.76μm for the G5) due to its larger sensor. Moreover, the A7R III is a somewhat more recent model (by 5 years and 3 months) than the G5, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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.

Unlike the G5, 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).

A7R III versus G5 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"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony A7R III» Full Frame 42.2 7952 53044K/30p26.014.73523100
Panasonic G5« Four Thirds 15.9 4608 34561080/60p----
Hasselblad X1D« » Medium Format 51.3 8272 62001080/25p26.214.84489102
Panasonic GX850« » Four Thirds 15.8 4592 34484K/30p23.213.358673
Panasonic G7« » Four Thirds 15.8 4592 34484K/30p----
Panasonic GF6« » Four Thirds 15.8 4592 34481080/60i20.710.662254
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961
Panasonic G3« » Four Thirds 15.8 4592 34481080/60i21.010.666756
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096
Sony A9« » Full Frame 24.0 6000 40004K/30p24.913.3351792
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695
Sony A99« » Full Frame 24.0 6000 40001080/60p25.014.0155589

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 higher video resolution than the G5. It can shoot video footage at 4K/30p, while the Panasonic is limited to 1080/60p.

 

Feature comparison: Sony A7R III vs Panasonic G5

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the A7R III offers a substantially higher resolution than the one in the G5 (3686k vs 1440k dots). The table below summarizes some of the other core capabilities of the Sony A7R III and Panasonic G5 in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
  Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Sony A7R III»3686 n 3.0 1440 tilting Y 8000 10.0 n Y
Panasonic G5«1440 n 3.0 920 swivel Y 4000 6.0 Y n
Hasselblad X1D« »2360 n 3.0 920 fixed Y 2000 2.3 n n
Panasonic GX850« »- n 3.0 1040 tilting Y 500 10.0 Y n
Panasonic G7« »2360 n 3.0 1040 swivel Y 4000 7.0 Y n
Panasonic GF6« »- n 3.0 1040 tilting Y 4000 4.2 Y n
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n
Panasonic G3« »1440 n 3.0 460 swivel Y 4000 4.0 Y n
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y
Sony A9« »3686 n 3.0 1440 tilting Y 8000 20.0 n Y
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7S II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y
Sony A7R« »2400 n 3.0 1230 tilting n 8000 4.0 n n
Sony A99« »2359 Y 3.0 1229 full-flex n 8000 6.0 n Y

The A7R III is a current model that online retailers, such as amazon, will have in stock. In contrast, the G5 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the G5 was succeeded by the Panasonic G6.

Review summary: Sony A7R III vs Panasonic G5

So what conclusions can be drawn? Is the Sony A7R III better than the Panasonic G5 or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Sony Alpha A7R III:

  • More detail: Offers more megapixels (42.2 vs 15.9MP) with a 66% higher linear resolution.
  • 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: Features a larger and more technologically advanced imaging sensor.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 1440k dots).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 920k dots).
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 6 flaps/sec) to capture the decisive moment.
  • Longer lasting: Can take more shots (650 versus 320) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More modern: Reflects 5 years and 3 months of technical progress since the G5 launch.

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Advantages of the Panasonic Lumix DMC-G5:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • More compact: Is smaller (120x83mm vs 127x96mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 254g or 39 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 (81 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in July 2012).

If the count of relative strengths (bullet points above) is taken as a measure, the A7R III is the clear winner of the match-up (13 : 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.

A7R III 13:07 G5

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the A7R III and the G5 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why expert reviews are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.

Review scores
  Camera cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Sony A7R III»HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i
Panasonic G5«HiRec-4.5/54.5/54.5/5 Jul 2012 599- i
Hasselblad X1D« »rev---4/5 Jun 2016 8,995 i i
Panasonic GX850« »Rec76/1004.5/54/54.5/5 Jan 2017 549 i i
Panasonic G7« »HiRec80/1005/54.5/54.5/5 May 2015 649- i
Panasonic GF6« »HiRec-4.5/5-4.5/5 Apr 2013 499- i
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i
Panasonic G3« »HiRec75/1004.5/54.5/55/5 May 2011 599- i
Sony A7 III« »HiRec89/1005/5-5/5 Feb 2018 1,999 i i
Sony A9« »HiRec89/1005/55/55/5 Apr 2017 4,499 i i
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i
Sony A7S II« »Rec-4.5/55/55/5 Sep 2015 2,999 i i
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i
Sony A7R« »HiRec82/1004.5/55/55/5 Oct 2013 2,299- i
Sony A99« »-84/1004.5/5rev4.5/5 Sep 2012 2,799- i

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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

 

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. If you cannot find the camera you are interested in, please contact me, and I will try to update the database with the necessary infos.

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