Fujifilm X-A3 versus Sony A7R III
The Fujifilm X-A3 and the Sony Alpha A7R III are two digital cameras that were officially introduced, respectively, in August 2016 and October 2017. Both the X-A3 and the A7R III are mirrorless interchangeable lens cameras that are based on an APS-C (X-A3) and a full frame sensor. The Fujifilm has a resolution of 24 megapixel, whereas the Sony provides 42.2 MP.
The side-by-side display below illustrates the physical size and weight of the Fujifilm X-A3 and the Sony A7R III. Three successive views from the front, the top, and the rear are shown. All size dimensions 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 X-A3 – represents the basis or 100 percent across all the size and weight measures).
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 considerably larger (56 percent) than the Fujifilm X-A3. Moreover, the A7R III is substantially heavier (92 percent) than the X-A3. It is noteworthy in this context that the A7R III is splash and dust-proof, while the X-A3 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 Fujinon X Lens Catalog (X-A3) 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.
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 comparisons there.
|Camera Body Specifications
|Fujifilm X-A3 (⇒ rgt)||117 mm||67 mm||40 mm||339 g||410||no||2016||399||latest||check|
|Sony A7R III (⇒ lft)||127 mm||96 mm||74 mm||650 g||650||YES||2017||3,199||latest||check|
|Canon SX730 (⇒ lft | rgt)||110 mm||64 mm||40 mm||300 g||250||no||2017||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-T20 (⇒ lft | rgt)||118 mm||83 mm||41 mm||383 g||350||no||2017||899||latest||check|
|Fujifilm X-E2S (⇒ lft | rgt)||129 mm||75 mm||37 mm||350 g||350||no||2016||699||discont.||check|
|Fujifilm X-A10 (⇒ lft | rgt)||117 mm||67 mm||40 mm||331 g||410||no||2016||399||latest||check|
|Fujifilm X-T10 (⇒ lft | rgt)||118 mm||83 mm||41 mm||381 g||350||no||2015||799||discont.||check|
|Fujifilm X-A2 (⇒ lft | rgt)||117 mm||67 mm||40 mm||350 g||410||no||2015||399||discont.||check|
|Fujifilm X-A1 (⇒ lft | rgt)||117 mm||67 mm||39 mm||330 g||350||no||2013||399||discont.||check|
|Sony A7 III (⇒ lft | rgt)||127 mm||96 mm||74 mm||650 g||610||YES||2018||1,999||latest||check|
|Sony A99 II (⇒ lft | rgt)||143 mm||104 mm||76 mm||849 g||490||YES||2016||3,199||latest||check|
|Sony A7R II (⇒ lft | rgt)||127 mm||96 mm||60 mm||625 g||290||YES||2015||3,199||discont.||check|
|Sony A7 II (⇒ lft | rgt)||127 mm||96 mm||60 mm||599 g||350||YES||2014||1,999||discont.||check|
|Sony A7R (⇒ lft | rgt)||127 mm||94 mm||48 mm||465 g||340||YES||2013||2,299||discont.||check|
|YI M1 (⇒ lft | rgt)||114 mm||64 mm||34 mm||281 g||450||no||2016||349||latest||check|
The listed 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 88 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.
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. 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 are more costly to manufacture and tent to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Fujifilm X-A3 features an APS-C sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 134 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 42.2MP, the A7R III offers a higher resolution than the X-A3 (24MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.92μm for the X-A3) due to its larger sensor. Moreover, the A7R III is a somewhat more recent model (by 1 year and 2 months) than the X-A3, and its sensor might 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.
Unlike the X-A3, 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).
For most 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. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Fujifilm X-A3 (⇒ rgt)||APS-C||24.0||6000||4000||1080/60p||-||-||-||-|
|Sony A7R III (⇒ lft)||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|Canon SX730 (⇒ lft | rgt)||1/2.3||20.2||5184||3888||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-T20 (⇒ 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-A10 (⇒ lft | rgt)||APS-C||16.0||4896||3264||1080/30p||-||-||-||-|
|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||-||-||-||-|
|Fujifilm X-A1 (⇒ lft | rgt)||APS-C||16.0||4896||3264||1080/30p||-||-||-||-|
|Sony A7 III (⇒ lft | rgt)||Full Frame||24.0||6000||4000||4K/30p||..||..||..||..|
|Sony A99 II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|Sony A7R II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7 II (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony A7R (⇒ lft | rgt)||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95|
|YI M1 (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||-||-||-||-|
Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the A7R III 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. For example, the A7R III has an electronic viewfinder (3686k dots), which can be very helpful when shooting in bright sunlight. In contrast, the X-A3 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Fujifilm X-A3 and Sony A7R III 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.
|Fujifilm X-A3 (⇒ rgt)||no||no||3.0||1040||tilting||YES||4000||6.0||7||no|
|Sony A7R III (⇒ lft)||3686||no||3.0||1440||tilting||YES||8000||10.0||no||YES|
|Canon SX730 (⇒ lft | rgt)||no||no||3.0||922||tilting||no||3200||5.9||4||YES|
|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-T20 (⇒ lft | rgt)||2360||no||3.0||1040||tilting||YES||4000||8.0||5||no|
|Fujifilm X-E2S (⇒ lft | rgt)||2360||no||3.0||1040||fixed||no||4000||7.0||7||no|
|Fujifilm X-A10 (⇒ lft | rgt)||no||no||3.0||1040||tilting||no||4000||6.0||5||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|
|Fujifilm X-A1 (⇒ lft | rgt)||no||no||3.0||920||tilting||no||4000||5.6||7||no|
|Sony A7 III (⇒ lft | rgt)||2359||no||3.0||922||tilting||YES||8000||10||no||YES|
|Sony A99 II (⇒ lft | rgt)||2400||YES||3.0||1229||full-flex||no||8000||12.0||no||YES|
|Sony A7R II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7 II (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||YES|
|Sony A7R (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||4.0||no||no|
|YI M1 (⇒ lft | rgt)||no||no||3.0||1040||fixed||YES||4000||5.0||no||no|
Both the X-A3 and the A7R III 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 A7R III followed on from the Sony A7R II.
So what conclusions can be drawn? Is the Fujifilm X-A3 better than the Sony A7R III or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Fujifilm X-A3:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More compact: Is smaller (117x67mm vs 127x96mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 311g or 48 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 (88 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in August 2016).
Reasons to prefer the Sony Alpha A7R III:
- More detail: Has more megapixels (42.2 vs 24MP), which boosts linear resolution by 33%.
- 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: Is equipped with a larger and more technologically advanced sensor.
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- Easier framing: Has an electronic viewfinder for image framing and settings control.
- More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k 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: Gets more shots (650 versus 410) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
- More modern: Was introduced somewhat (1 year and 2 months) more recently.
If the number of relative strengths (bullet points above) is taken as a guide, the A7R III is the clear winner of the contest (13 : 6 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features.
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 A7R III 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 why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Fujifilm X-A3 (⇒ rgt)||-||74/100||4.5/5||-||4/5||2016||399||latest||check|
|Sony A7R III (⇒ lft)||HiRec||90/100 Gold||4.5/5||5/5||5/5||2017||3,199||latest||check|
|Canon SX730 (⇒ lft | rgt)||Rec||-||4/5||-||4/5||2017||399||latest||check|
|Fujifilm X-A5 (⇒ lft | rgt)||..||..||..||..||..||2018||399||latest||check|
|Fujifilm X-E3 (⇒ lft | rgt)||Rec||84/100 Gold||4.5/5||..||4.5/5||2017||899||latest||check|
|Fujifilm X-T20 (⇒ lft | rgt)||HiRec||82/100 Silver||5/5||..||4.5/5||2017||899||latest||check|
|Fujifilm X-E2S (⇒ lft | rgt)||-||77/100||4.5/5||-||4.5/5||2016||699||discont.||check|
|Fujifilm X-A10 (⇒ lft | rgt)||-||-||4/5||-||4/5||2016||399||latest||check|
|Fujifilm X-T10 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4/5||5/5||2015||799||discont.||check|
|Fujifilm X-A2 (⇒ lft | rgt)||-||-||4.5/5||4/5||4.5/5||2015||399||discont.||check|
|Fujifilm X-A1 (⇒ lft | rgt)||-||-||4.5/5||-||4.5/5||2013||399||discont.||check|
|Sony A7 III (⇒ lft | rgt)||HiRec||..||..||..||..||2018||1,999||latest||check|
|Sony A99 II (⇒ lft | rgt)||-||85/100 Silver||4.5/5||4.5/5||4.5/5||2016||3,199||latest||check|
|Sony A7R II (⇒ lft | rgt)||HiRec||90/100 Gold||5/5||4.5/5||5/5||2015||3,199||discont.||check|
|Sony A7 II (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||5/5||2014||1,999||discont.||check|
|Sony A7R (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||5/5||5/5||2013||2,299||discont.||check|
|YI M1 (⇒ lft | rgt)||-||69/100||-||2.5/5||-||2016||349||latest||check|
The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, 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.
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