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Panasonic GX850 versus Fujifilm X-A3

The Panasonic Lumix DMC-GX850 (called Panasonic GX800 in some regions) and the Fujifilm X-A3 are two digital cameras that were announced, respectively, in January 2017 and August 2016. Both the GX850 and the X-A3 are mirrorless interchangeable lens cameras that are based on a Four Thirds (GX850) and an APS-C (X-A3) sensor. The Panasonic has a resolution of 15.8 megapixel, whereas the Fujifilm provides 24 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: Panasonic GX850 vs Fujifilm X-A3

The physical size and weight of the Panasonic GX850 and the Fujifilm X-A3 are illustrated 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 width, height and depth measures are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the GX850 – represents 100 percent across all the size and weight measures).

Compare Panasonic GX850 vs Fujifilm X-A3
Compare GX850 versus X-A3 top
Compare GX850 and X-A3 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Fujifilm X-A3 is notably larger (13 percent) than the Panasonic GX850. Moreover, the X-A3 is markedly heavier (26 percent) than the GX850. In this context, it is worth noting that neither the GX850 nor the X-A3 are weather-sealed.

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 Micro Four Thirds Lens Catalog (GX850) and the Fujinon X Lens Catalog (X-A3). 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 GX850 gets 210 shots out of its DMW-BLH7 battery, while the X-A3 can take 410 images on a single charge of its NP-W126S 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)
Camera
Model
Panasonic GX850» 4.2 in 2.6 in 1.3 in 9.5 oz 210 n Jan 2017 549 i i Panasonic GX850
Fujifilm X-A3« 4.6 in 2.6 in 1.6 in 12.0 oz 410 n Aug 2016 399 i i Fujifilm X-A3
Fujifilm X-A5« » 4.6 in 2.7 in 1.6 in 12.7 oz 450 n Jan 2018 399 i i Fujifilm X-A5
Fujifilm X-E3« » 4.8 in 2.9 in 1.7 in 11.9 oz 350 n Sep 2017 899 i i Fujifilm X-E3
Fujifilm X-E2S« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Jan 2016 699- i Fujifilm X-E2S
Fujifilm X-T10« » 4.6 in 3.3 in 1.6 in 13.4 oz 350 n May 2015 799- i Fujifilm X-T10
Fujifilm X-A2« » 4.6 in 2.6 in 1.6 in 12.3 oz 410 n Jan 2015 399- i Fujifilm X-A2
Panasonic G7« » 4.9 in 3.4 in 3.0 in 14.5 oz 350 n May 2015 649- i Panasonic G7
Panasonic GF7« » 4.2 in 2.6 in 1.3 in 9.4 oz 230 n Jan 2015 499- i Panasonic GF7
Panasonic GF6« » 4.4 in 2.6 in 1.5 in 11.4 oz 340 n Apr 2013 499- i Panasonic GF6
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6
Panasonic GF5« » 4.3 in 2.6 in 1.5 in 9.4 oz 360 n Apr 2012 499- i Panasonic GF5
Panasonic G5« » 4.7 in 3.3 in 2.8 in 14.0 oz 320 n Jul 2012 599- i Panasonic G5
Panasonic GF3« » 4.3 in 2.6 in 1.3 in 9.3 oz 300 n Jun 2011 549- i Panasonic GF3
Panasonic G3« » 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599- i Panasonic G3
Panasonic GX1« » 4.6 in 2.7 in 1.5 in 11.2 oz 320 n Nov 2011 949- i Panasonic GX1
Panasonic GF2« » 4.4 in 2.7 in 1.3 in 10.9 oz 300 n Nov 2010 549- i Panasonic GF2

Any camera purchase will naturally be influenced heavily by the price. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The X-A3 was launched at a markedly lower price (by 27 percent) than the GX850, 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: Panasonic GX850 vs Fujifilm X-A3

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 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. 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GX850 features a Four Thirds sensor and the Fujifilm X-A3 an APS-C sensor. The sensor area in the X-A3 is 64 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the GX850 has a native 4:3 aspect ratio, while the one in the X-A3 offers a 3:2 aspect.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.

Panasonic GX850 and Fujifilm X-A3 sensor measures

With 24MP, the X-A3 offers a higher resolution than the GX850 (15.8MP), but the X-A3 nevertheless has larger individual pixels (pixel pitch of 3.92μm versus 3.77μm for the GX850) due to its larger sensor. However, the GX850 is a somewhat more recent model (by 4 months) than the X-A3, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the GX850 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

GX850 versus X-A3 MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Panasonic GX850» Four Thirds 15.8 4592 34484K/30p23.213.358673Panasonic GX850
Fujifilm X-A3« APS-C 24.0 6000 40001080/60p----Fujifilm X-A3
Fujifilm X-A5« » APS-C 24.0 6000 40004K/15p----Fujifilm X-A5
Fujifilm X-E3« » APS-C 24.0 6000 40004K/30p----Fujifilm X-E3
Fujifilm X-E2S« » APS-C 16.0 4896 32641080/60p----Fujifilm X-E2S
Fujifilm X-T10« » APS-C 16.0 4896 32641080/60p----Fujifilm X-T10
Fujifilm X-A2« » APS-C 16.0 4896 32641080/30p----Fujifilm X-A2
Panasonic G7« » Four Thirds 15.8 4592 34484K/30p----Panasonic G7
Panasonic GF7« » Four Thirds 15.8 4592 34481080/60p----Panasonic GF7
Panasonic GF6« » Four Thirds 15.8 4592 34481080/60i20.710.662254Panasonic GF6
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
Panasonic GF5« » Four Thirds 12.0 4000 30001080/60i21.411.661861Panasonic GF5
Panasonic G5« » Four Thirds 15.9 4608 34561080/60p----Panasonic G5
Panasonic GF3« » Four Thirds 12.0 4000 30001080/60i20.610.045849Panasonic GF3
Panasonic G3« » Four Thirds 15.8 4592 34481080/60i21.010.666756Panasonic G3
Panasonic GX1« » Four Thirds 15.8 4592 34481080/60p20.810.670355Panasonic GX1
Panasonic GF2« » Four Thirds 12.0 4000 30001080/60i21.210.350654Panasonic GF2

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the GX850 provides a higher video resolution than the X-A3. It can shoot video footage at 4K/30p, while the Fujifilm is limited to 1080/60p.

 

Feature comparison: Panasonic GX850 vs Fujifilm X-A3

Beyond body and sensor, cameras can and do differ across a range of features. The GX850 and the X-A3 are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. The adjacent table lists some of the other core features of the Panasonic GX850 and Fujifilm X-A3 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

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)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Panasonic GX850»- n 3.0 1040 tilting Y 500 10.0 Y n Panasonic GX850
Fujifilm X-A3«- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A3
Fujifilm X-A5« »- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A5
Fujifilm X-E3« »2360 n 3.0 1040 fixed Y 4000 8.0 n n Fujifilm X-E3
Fujifilm X-E2S« »2360 n 3.0 1040 fixed n 4000 7.0 Y n Fujifilm X-E2S
Fujifilm X-T10« »2360 n 3.0 920 tilting n 4000 8.0 Y n Fujifilm X-T10
Fujifilm X-A2« »- n 3.0 920 tilting n 4000 5.6 Y n Fujifilm X-A2
Panasonic G7« »2360 n 3.0 1040 swivel Y 4000 7.0 Y n Panasonic G7
Panasonic GF7« »- n 3.0 1040 tilting Y 500 5.8 Y n Panasonic GF7
Panasonic GF6« »- n 3.0 1040 tilting Y 4000 4.2 Y n Panasonic GF6
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6
Panasonic GF5« »- n 3.0 920 fixed Y 4000 4.0 Y n Panasonic GF5
Panasonic G5« »1440 n 3.0 920 swivel Y 4000 6.0 Y n Panasonic G5
Panasonic GF3« »- n 3.0 460 fixed Y 4000 3.2 Y n Panasonic GF3
Panasonic G3« »1440 n 3.0 460 swivel Y 4000 4.0 Y n Panasonic G3
Panasonic GX1« »- n 3.0 460 fixed Y 4000 4.2 Y n Panasonic GX1
Panasonic GF2« »- n 3.0 460 fixed Y 4000 2.6 Y n Panasonic GF2

The reported shutter speed and shutter burst refer to the use of the mechanical shutter. In addition, the GX850 features an electronic shutter, which makes silent shooting and higher burst speeds possible. However, this mode is less suitable for photographing moving objects (rolling shutter) or shooting under artificial light sources (flickering).

Both the GX850 and the X-A3 are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The X-A3 replaced the earlier Fujifilm X-A2, while the GX850 followed on from the Panasonic GF7.

Review summary: Panasonic GX850 vs Fujifilm X-A3

So what is the bottom line? Which of the two cameras – the Panasonic GX850 or the Fujifilm X-A3 – has the upper hand? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GX850:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Faster burst: Shoots at higher frequency (10 vs 6 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (107x65mm vs 117x67mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 70g or 21 percent) and hence easier to carry around.
  • More modern: Is somewhat more recent (announced 4 months after the X-A3).

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Advantages of the Fujifilm X-A3:

  • More detail: Has more megapixels (24 vs 15.8MP), which boosts linear resolution by 26%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 500/sec) to freeze action.
  • Longer lasting: Gets more shots (410 versus 210) out of a single battery charge.
  • More affordable: Was introduced into a lower priced category (27 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in August 2016).

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (7 points each). 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.

GX850 07:07 X-A3

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the GX850 or the X-A3 handle or 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. This is where reviews by experts come in. 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). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Panasonic GX850»Rec76/1004.5/54/54.5/5 Jan 2017 549 i i Panasonic GX850
Fujifilm X-A3«-74/1004.5/5-4/5 Aug 2016 399 i i Fujifilm X-A3
Fujifilm X-A5« »Rec-4/54/53.5/5 Jan 2018 399 i i Fujifilm X-A5
Fujifilm X-E3« »Rec84/1004.5/54.5/54.5/5 Sep 2017 899 i i Fujifilm X-E3
Fujifilm X-E2S« »-77/1004.5/5-4.5/5 Jan 2016 699- i Fujifilm X-E2S
Fujifilm X-T10« »HiRec80/1005/54/55/5 May 2015 799- i Fujifilm X-T10
Fujifilm X-A2« »--4.5/54/54.5/5 Jan 2015 399- i Fujifilm X-A2
Panasonic G7« »HiRec80/1005/54.5/54.5/5 May 2015 649- i Panasonic G7
Panasonic GF7« »Rec-4.5/54.5/54.5/5 Jan 2015 499- i Panasonic GF7
Panasonic GF6« »HiRec-4.5/5-4.5/5 Apr 2013 499- i Panasonic GF6
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6
Panasonic GF5« »--4.5/54/54.5/5 Apr 2012 499- i Panasonic GF5
Panasonic G5« »HiRec-4.5/54.5/54.5/5 Jul 2012 599- i Panasonic G5
Panasonic GF3« »82/10071/1004.5/54.5/54/5 Jun 2011 549- i Panasonic GF3
Panasonic G3« »HiRec75/1004.5/54.5/55/5 May 2011 599- i Panasonic G3
Panasonic GX1« »Rec77/1004.5/54.5/54.5/5 Nov 2011 949- i Panasonic GX1
Panasonic GF2« »82/10070/1004.5/54.5/54.5/5 Nov 2010 549- i Panasonic GF2

Care should be taken when interpreting the review scores above, though. The ratings are only valid when refering 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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. If the camera you are interested in is not available, kindly get in touch, and I will try to update the database with the necessary infos.

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