Fujifilm X-A3 vs Panasonic GX850
The Fujifilm X-A3 and the Panasonic Lumix DMC-GX850 (labelled Panasonic GX800 in some countries) are two digital cameras that were revealed to the public, respectively, in August 2016 and January 2017. Both the X-A3 and the GX850 are mirrorless interchangeable lens cameras that are based on an APS-C (X-A3) and a Four Thirds (GX850) sensor. The Fujifilm 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-A3 and the Panasonic Lumix DMC-GX850? 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.
An illustration of the physical size and weight of the Fujifilm X-A3 and the Panasonic GX850 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 width, height and depth dimensions are rounded to the nearest millimeter.
The X-A3 can be obtained in three different colors (silver, brown, pink), while the GX850 is also available in three color-versions, but different ones (black, silver, red).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX850 is notably smaller (11 percent) than the Fujifilm X-A3. Moreover, the GX850 is markedly lighter (21 percent) than the X-A3. In this context, it is worth noting that neither the X-A3 nor the GX850 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 compare the optics available for the two cameras in the Fujinon X Lens Catalog (X-A3) and the Micro Four Thirds Lens Catalog (GX850). 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 X-A3 gets 410 shots out of its NP-W126S battery, while the GX850 can take 210 images on a single charge of its DMW-BLH7 power pack. The power pack in the X-A3 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 want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Fujifilm X-A3||117 mm||67 mm||40 mm||339 g||410||n||Aug 2016||399|
|2.||Panasonic GX850||107 mm||65 mm||33 mm||269 g||210||n||Jan 2017||549|
|3.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|4.||Fujifilm X-A5||117 mm||68 mm||40 mm||361 g||450||n||Jan 2018||399|
|5.||Fujifilm X-E3||121 mm||74 mm||43 mm||337 g||350||n||Sep 2017||899|
|6.||Fujifilm X-T20||118 mm||83 mm||41 mm||383 g||350||n||Jan 2017||899|
|7.||Fujifilm X-A10||117 mm||67 mm||40 mm||331 g||410||n||Dec 2016||399|
|8.||Fujifilm X-E2S||129 mm||75 mm||37 mm||350 g||350||n||Jan 2016||699|
|9.||Fujifilm X-A2||117 mm||67 mm||40 mm||350 g||410||n||Jan 2015||399|
|10.||Fujifilm X-T10||118 mm||83 mm||41 mm||381 g||350||n||May 2015||799|
|11.||Panasonic TZ90||112 mm||67 mm||41 mm||322 g||380||n||Apr 2017||449|
|12.||Panasonic GF7||107 mm||65 mm||33 mm||266 g||230||n||Jan 2015||499|
|13.||Panasonic G6||122 mm||85 mm||71 mm||390 g||340||n||Apr 2013||599|
|14.||Panasonic G5||120 mm||83 mm||71 mm||396 g||320||n||Jul 2012||599|
|15.||Panasonic G3||115 mm||84 mm||47 mm||336 g||270||n||May 2011||599|
|16.||Panasonic GX1||116 mm||68 mm||39 mm||318 g||320||n||Nov 2011||699|
|17.||YI M1||114 mm||64 mm||34 mm||281 g||450||n||Sep 2016||349|
|Notes: 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 X-A3 was launched at a markedly lower price (by 27 percent) than the GX850, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.
The size of the sensor inside a digital camera is one of the key determinants 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Fujifilm X-A3 features an APS-C sensor and the Panasonic GX850 a Four Thirds sensor. The sensor area in the GX850 is 39 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the X-A3 has a native 3:2 aspect ratio, while the one in the GX850 offers a 4:3 aspect.
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 pixels. 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.
The resolution advantage of the Fujifilm X-A3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the X-A3 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 GX850 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 Fujifilm X-A3 has a native sensitivity range from ISO 200 to ISO 6400, which can be extended to ISO 100-25600. The corresponding ISO settings for the Panasonic Lumix DMC-GX850 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
| DXO |
|2.||Panasonic GX850||Four Thirds||15.8||4592||3448||4K/30p||23.2||13.3||586||73|
|12.||Panasonic GF7||Four Thirds||15.8||4592||3448||1080/60p||..||..||..||..|
|13.||Panasonic G6||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|14.||Panasonic G5||Four Thirds||15.9||4608||3456||1080/60p||..||..||..||..|
|15.||Panasonic G3||Four Thirds||15.8||4592||3448||1080/60i||21.0||10.6||667||56|
|16.||Panasonic GX1||Four Thirds||15.8||4592||3448||1080/60p||20.8||10.6||703||55|
|17.||YI M1||Four Thirds||20.2||5184||3888||4K/30p||..||..||..||..|
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the GX850 provides a better video resolution than the X-A3. It can shoot movie footage at 4K/30p, while the Fujifilm is limited to 1080/60p.
Apart from body and sensor, cameras can and do differ across a range of features. The X-A3 and the GX850 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 following table reports on some other key feature differences and similarities of the Fujifilm X-A3, the Panasonic GX850, and comparable cameras.
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 Fujifilm X-A3 and the Panasonic GX850 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.
Concerning the storage of imaging data, both the X-A3 and the GX850 write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 Fujifilm X-A3 and Panasonic Lumix DMC-GX850 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
It is notable that the X-A3 has a hotshoe, while the GX850 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.
The GX850 is a recent model that features in the current product line-up of Panasonic. In contrast, the X-A3 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the X-A3 was succeeded by the Fujifilm X-A5. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Fujifilm and Panasonic websites.
So what is the bottom line? Is there a clear favorite between the Fujifilm X-A3 and the Panasonic GX850? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Fujifilm X-A3:
- More detail: Offers more megapixels (24 vs 15.8MP) with a 26% higher linear resolution.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
- Richer colors: The pixel size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/500s) to freeze action.
- Longer lasting: Can take more shots (410 versus 210) on a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- 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).
Reasons to prefer 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 will fit more readily into a bag.
- Less heavy: Has a lower weight (by 70g or 21 percent) and is thus easier to take along.
- More modern: Was introduced somewhat (4 months) more recently.
If the count of individual advantages (bullet points above) is taken as a guide, the X-A3 is the clear winner of the match-up (12 : 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. 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.
How about other alternatives? Do the specifications of the Fujifilm X-A3 and the Panasonic GX850 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 technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the X-A3 or the GX850 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], 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.
|1.||Fujifilm X-A3||..||..||74/100||4.5/5||4/5||Aug 2016||399|
|2.||Panasonic GX850||..||+||76/100||4.5/5||4.5/5||Jan 2017||549|
|3.||Canon SX730||..||+||..||4/5||4/5||Apr 2017||399|
|4.||Fujifilm X-A5||..||+||..||4/5||3.5/5||Jan 2018||399|
|5.||Fujifilm X-E3||4.5/5||+||84/100||4.5/5||4.5/5||Sep 2017||899|
|6.||Fujifilm X-T20||5/5||+ +||82/100||5/5||4.5/5||Jan 2017||899|
|7.||Fujifilm X-A10||..||..||..||4/5||4/5||Dec 2016||399|
|8.||Fujifilm X-E2S||4.5/5||..||77/100||4.5/5||4.5/5||Jan 2016||699|
|9.||Fujifilm X-A2||4/5||..||..||4.5/5||4.5/5||Jan 2015||399|
|10.||Fujifilm X-T10||4.5/5||+ +||80/100||5/5||5/5||May 2015||799|
|11.||Panasonic TZ90||..||+ +||..||4/5||4/5||Apr 2017||449|
|12.||Panasonic GF7||4/5||+||..||4.5/5||4.5/5||Jan 2015||499|
|13.||Panasonic G6||4/5||+ +||..||5/5||4.5/5||Apr 2013||599|
|14.||Panasonic G5||3/5||+ +||..||4.5/5||4.5/5||Jul 2012||599|
|15.||Panasonic G3||3/5||+ +||75/100||4.5/5||5/5||May 2011||599|
|16.||Panasonic GX1||3/5||+||77/100||4.5/5||4.5/5||Nov 2011||699|
|17.||YI M1||..||..||69/100||..||..||Sep 2016||349|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, 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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
Specifications: Fujifilm X-A3 vs Panasonic GX850
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 Model||Fujifilm X-A3||Panasonic GX850|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Fujifilm X mount lenses||Micro Four Thirds lenses|
|Launch Date||August 2016||January 2017|
|Launch Price||USD 399||USD 549|
|Sensor Specs||Fujifilm X-A3||Panasonic GX850|
|Sensor Format||APS-C Sensor||Four Thirds Sensor|
|Sensor Size||23.5 x 15.7 mm||17.3 x 13.0 mm|
|Sensor Area||368.95 mm2||224.9 mm2|
|Sensor Diagonal||28.3 mm||21.6 mm|
|Sensor Resolution||24 Megapixels||15.8 Megapixels|
|Image Resolution||6000 x 4000 pixels||4592 x 3448 pixels|
|Pixel Pitch||3.92 μm||3.77 μm|
|Pixel Density||6.50 MP/cm2||7.04 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/60p Video||4K/30p Video|
|ISO Setting||200 - 6,400 ISO||200 - 25,600 ISO|
|ISO Boost||100 - 25,600 ISO||100 - 25,600 ISO|
|DXO Sensor Quality (score)||..||73|
|DXO Color Depth (bits)||..||23.2|
|DXO Dynamic Range (EV)||..||13.3|
|DXO Low Light (ISO)||..||586|
|Screen Specs||Fujifilm X-A3||Panasonic GX850|
|Viewfinder Type||no viewfinder||no viewfinder|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||1040k dots|
|LCD Attachment||Tilting screen||Tilting screen|
|Shooting Specs||Fujifilm X-A3||Panasonic GX850|
|Focus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/500s|
|Continuous Shooting||6 shutter flaps/s||10 shutter flaps/s|
|Electronic Shutter||up to 1/32000s||up to 1/16000s|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Fujifilm X-A3||Panasonic GX850|
|External Flash||Hotshoe||no Hotshoe|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||micro HDMI|
|Wifi Support||Wifi built-in||Wifi built-in|
|Body Specs||Fujifilm X-A3||Panasonic GX850|
|Battery Life (CIPA)||410 shots per charge||210 shots per charge|
|In-Camera Charging||USB charging||no USB charging|
117 x 67 x 40 mm
(4.6 x 2.6 x 1.6 in)
107 x 65 x 33 mm
(4.2 x 2.6 x 1.3 in)
|Camera Weight||339 g (12.0 oz)||269 g (9.5 oz)|
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