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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. 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
GX850 versus X-A3 top view
GX850 and X-A3 rear side
Body view (GX850 on the left)

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 Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX850 (⇒ rgt) 107 mm 65 mm 33 mm 269 g 210 no 2017 549 latest check
Fujifilm X-A3 (⇒ lft) 117 mm 67 mm 40 mm 339 g 410 no 2016 399 latest check
Fujifilm X-A5 (⇒ lft | rgt) 117 mm 68 mm 40 mm 361 g 450 no 2018 399 latest check
Fujifilm X-E3 (⇒ lft | rgt) 121 mm 74 mm 43 mm 337 g 350 no 2017 899 latest check
Fujifilm X-E2S (⇒ lft | rgt) 129 mm 75 mm 37 mm 350 g 350 no 2016 699discont. check
Fujifilm X-T10 (⇒ lft | rgt) 118 mm 83 mm 41 mm 381 g 350 no 2015 799discont. check
Fujifilm X-A2 (⇒ lft | rgt) 117 mm 67 mm 40 mm 350 g 410 no 2015 399discont. check
Panasonic G7 (⇒ lft | rgt) 125 mm 86 mm 77 mm 410 g 350 no 2015 649discont. check
Panasonic GF7 (⇒ lft | rgt) 107 mm 65 mm 33 mm 266 g 230 no 2015 499discont. check
Panasonic GF6 (⇒ lft | rgt) 111 mm 65 mm 38 mm 323 g 340 no 2013 499discont. check
Panasonic G6 (⇒ lft | rgt) 122 mm 85 mm 71 mm 390 g 340 no 2013 599discont. check
Panasonic GF5 (⇒ lft | rgt) 108 mm 67 mm 37 mm 267 g 360 no 2012 499discont. check
Panasonic G5 (⇒ lft | rgt) 120 mm 83 mm 71 mm 396 g 320 no 2012 599discont. check
Panasonic GF3 (⇒ lft | rgt) 108 mm 67 mm 32 mm 264 g 300 no 2011 549discont. check
Panasonic G3 (⇒ lft | rgt) 115 mm 84 mm 47 mm 336 g 270 no 2011 599discont. check
Panasonic GX1 (⇒ lft | rgt) 116 mm 68 mm 39 mm 318 g 320 no 2011 949discont. check
Panasonic GF2 (⇒ lft | rgt) 113 mm 68 mm 33 mm 310 g 300 no 2010 549discont. check

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


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.

Panasonic GX850 and Fujifilm X-A3 sensor measures
Sensor size

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
Sensor resolution

For most 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 Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GX850 (⇒ rgt) Four Thirds 15.8 4592 3448 4K/30p 23.2 13.3 586 73
Fujifilm X-A3 (⇒ lft) APS-C 24.0 6000 4000 1080/60p - - - -
Fujifilm X-A5 (⇒ lft | rgt) APS-C 24.0 6000 4000 4K/15p .. .. .. ..
Fujifilm X-E3 (⇒ lft | rgt) APS-C 24.0 6000 4000 4K/30p - - - -
Fujifilm X-E2S (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Fujifilm X-T10 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Fujifilm X-A2 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/30p - - - -
Panasonic G7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p - - - -
Panasonic GF7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p - - - -
Panasonic GF6 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60i 20.7 10.6 622 54
Panasonic G6 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 21.3 11.5 639 61
Panasonic GF5 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/60i 21.4 11.6 618 61
Panasonic G5 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p - - - -
Panasonic GF3 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/60i 20.6 10 458 49
Panasonic G3 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60i 21 10.6 667 56
Panasonic GX1 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 20.8 10.6 703 55
Panasonic GF2 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/60i 21.2 10.3 506 54

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 Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Panasonic GX850 (⇒ rgt) no no 3.0 1040 tilting YES 500 10.0 4 no
Fujifilm X-A3 (⇒ lft) no no 3.0 1040 tilting YES 4000 6.0 7 no
Fujifilm X-A5 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 6.0 5.7 no
Fujifilm X-E3 (⇒ lft | rgt) 2360 no 3.0 1040 fixed YES 4000 8.0 no no
Fujifilm X-E2S (⇒ lft | rgt) 2360 no 3.0 1040 fixed no 4000 7.0 7 no
Fujifilm X-T10 (⇒ lft | rgt) 2360 no 3.0 920 tilting no 4000 8.0 5 no
Fujifilm X-A2 (⇒ lft | rgt) no no 3.0 920 tilting no 4000 5.6 7 no
Panasonic G7 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 7.0 9.3 no
Panasonic GF7 (⇒ lft | rgt) no no 3.0 1040 tilting YES 500 5.8 4 no
Panasonic GF6 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 4.2 6.3 no
Panasonic G6 (⇒ lft | rgt) 1440 no 3.0 1036 swivel YES 4000 7.0 10.5 no
Panasonic GF5 (⇒ lft | rgt) no no 3.0 920 fixed YES 4000 4.0 6.3 no
Panasonic G5 (⇒ lft | rgt) 1440 no 3.0 920 swivel YES 4000 6.0 10.5 no
Panasonic GF3 (⇒ lft | rgt) no no 3.0 460 fixed YES 4000 3.2 6.3 no
Panasonic G3 (⇒ lft | rgt) 1440 no 3.0 460 swivel YES 4000 4.0 11 no
Panasonic GX1 (⇒ lft | rgt) no no 3.0 460 fixed YES 4000 4.2 7.6 no
Panasonic GF2 (⇒ lft | rgt) no no 3.0 460 fixed YES 4000 2.6 6.0 no

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.
  • 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 X-A3 comes out slightly ahead of the GX850 (7 : 6 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.

GX850 06:07 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. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
.com
dp
review
.com
ephoto
zine
.com
imaging
resource
.com
photography
blog
.com
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX850 (⇒ rgt) Rec 76/100 4.5/5 4/5 4.5/5 2017 549 latest check
Fujifilm X-A3 (⇒ lft) - 74/100 4.5/5 - 4/5 2016 399 latest check
Fujifilm X-A5 (⇒ lft | rgt) .. .. .. .. 3.5/5 2018 399 latest check
Fujifilm X-E3 (⇒ lft | rgt) Rec 84/100 Gold 4.5/5 4.5/5 4.5/5 2017 899 latest check
Fujifilm X-E2S (⇒ lft | rgt) - 77/100 4.5/5 - 4.5/5 2016 699discont. check
Fujifilm X-T10 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4/5 5/5 2015 799discont. check
Fujifilm X-A2 (⇒ lft | rgt) - - 4.5/5 4/5 4.5/5 2015 399discont. check
Panasonic G7 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4.5/5 4.5/5 2015 649discont. check
Panasonic GF7 (⇒ lft | rgt) Rec - 4.5/5 4.5/5 4.5/5 2015 499discont. check
Panasonic GF6 (⇒ lft | rgt) HiRec - 4.5/5 - 4.5/5 2013 499discont. check
Panasonic G6 (⇒ lft | rgt) HiRec - 5/5 - 4.5/5 2013 599discont. check
Panasonic GF5 (⇒ lft | rgt) - - 4.5/5 4/5 4.5/5 2012 499discont. check
Panasonic G5 (⇒ lft | rgt) HiRec - 4.5/5 4.5/5 4.5/5 2012 599discont. check
Panasonic GF3 (⇒ lft | rgt) 82/100 71/100 4.5/5 4.5/5 4/5 2011 549discont. check
Panasonic G3 (⇒ lft | rgt) 88/100 HiRec 75/100 Silver 4.5/5 4.5/5 5/5 2011 599discont. check
Panasonic GX1 (⇒ lft | rgt) 85/100 Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2011 949discont. check
Panasonic GF2 (⇒ lft | rgt) 82/100 70/100 4.5/5 4.5/5 4.5/5 2010 549discont. check

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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