Fujifilm X-A3 vs Sony A7S
The Fujifilm X-A3 and the Sony Alpha A7S are two digital cameras that were revealed to the public, respectively, in August 2016 and April 2014. Both the X-A3 and the A7S are mirrorless interchangeable lens cameras that are based on an APS-C (X-A3) and a full frame (A7S) sensor. The Fujifilm has a resolution of 24 megapixels, whereas the Sony provides 12 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Fujifilm X-A3||Sony A7S|
|Mirrorless system camera||Mirrorless system camera|
|Fujifilm X mount lenses||Sony E mount lenses|
|24 MP, APS-C Sensor||12 MP, Full Frame Sensor|
|1080/60p Video||1080/60p Video|
|ISO 200-6,400 (100 - 25,600)||ISO 100-102,400 (50 - 409,600)|
|No viewfinder, LCD framing||Electronic viewfinder (2400k dots)|
|3.0 LCD, 1040k dots||3.0 LCD, 921k dots|
|Tilting touchscreen||Tilting screen (not touch-sensitive)|
|6 shutter flaps per second||5 shutter flaps per second|
|not weather sealed||Weathersealed body|
|410 shots per battery charge||380 shots per battery charge|
|117 x 67 x 40 mm, 339 g||127 x 94 x 48 mm, 489 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-A3 and the Sony Alpha A7S? 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.
The side-by-side display below illustrates the physical size and weight of the Fujifilm X-A3 and the Sony A7S. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.
The X-A3 can be obtained in three different colors (silver, brown, pink), while the A7S is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S is considerably larger (52 percent) than the Fujifilm X-A3. Moreover, the A7S is substantially heavier (44 percent) than the X-A3. It is noteworthy in this context that the A7S 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 compare the optics available for the two cameras in the Fujinon X Lens Catalog (X-A3) and the Sony FE Lens Catalog (A7S). 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 A7S can take 380 images on a single charge of its NP-FW50 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient 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, 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.
|Fujifilm X-A3||117 mm||67 mm||40 mm||339 g||410||n||Aug 2016||399|
|Sony A7S||127 mm||94 mm||48 mm||489 g||380||Y||Apr 2014||2,499|
|Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|Fujifilm X-A5||117 mm||68 mm||40 mm||361 g||450||n||Jan 2018||399|
|Fujifilm X-E3||121 mm||74 mm||43 mm||337 g||350||n||Sep 2017||899|
|Fujifilm X-T20||118 mm||83 mm||41 mm||383 g||350||n||Jan 2017||899|
|Fujifilm X-A10||117 mm||67 mm||40 mm||331 g||410||n||Dec 2016||399|
|Fujifilm X-E2S||129 mm||75 mm||37 mm||350 g||350||n||Jan 2016||699|
|Fujifilm X-A2||117 mm||67 mm||40 mm||350 g||410||n||Jan 2015||399|
|Fujifilm X-T10||118 mm||83 mm||41 mm||381 g||350||n||May 2015||799|
|Nikon D750||141 mm||113 mm||78 mm||750 g||1230||Y||Sep 2014||2,299|
|Panasonic TZ90||112 mm||67 mm||41 mm||322 g||380||n||Apr 2017||449|
|Sony A7S II||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999|
|Sony A7||127 mm||94 mm||48 mm||474 g||340||Y||Oct 2013||1,699|
|Sony A7R||127 mm||94 mm||48 mm||465 g||340||Y||Oct 2013||2,299|
|Sony RX1R||113 mm||65 mm||70 mm||482 g||270||n||Jun 2013||2,799|
|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.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The X-A3 was launched at a markedly lower price (by 84 percent) than the A7S, 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.
The size of the imaging sensor is a crucial determinant 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 tend 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 A7S a full frame sensor. The sensor area in the A7S is 132 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.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.
Despite having a smaller sensor, the Fujifilm X-A3 offers a higher resolution of 24 megapixels, compared with 12 MP of the Sony A7S. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.92μm versus 8.45μm for the A7S). However, it should be noted that the X-A3 is much more recent (by 2 years and 4 months) than the A7S, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
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 Sony A7S are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 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 Sony Alpha A7S are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|Sony A7S||Full Frame||12.0||4240||2832||1080/60p||23.9||13.2||3702||87|
|Nikon D750||Full Frame||24.2||6016||4016||1080/60p||24.8||14.5||2956||93|
|Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Sony A7||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
|Sony A7R||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95|
|Sony RX1R||Full Frame||24.0||6000||4000||1080/60p||25.0||13.6||2537||91|
|YI M1||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, and both provide the same movie specifications (1080/60p).
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7S has an electronic viewfinder (2400k 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 A7S in connection with corresponding information for a sample of similar cameras.
|Sony A7S II||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y|
One difference between the cameras concerns the presence of an on-board flash. The X-A3 has one, while the A7S does not. While the built-in flash of the X-A3 is not very powerful, it can at times be useful as a fill-in light.The X-A3 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7S does not have a selfie-screen.
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 has 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.
The X-A3 writes its imaging data to SDXC cards, while the A7S uses SDXC or Memory Stick PRO Duo 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 Sony Alpha A7S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Sony A7S II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the A7S has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The X-A3 lacks such a headphone port.
Both the X-A3 and the A7S have been discontinued, but can regularly be found used on eBay. The A7S was replaced by the Sony A7S II, while the X-A3 was followed 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 Sony websites.
So what is the bottom line? Is there a clear favorite between the Fujifilm X-A3 and the Sony A7S? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Fujifilm X-A3:
- More detail: Offers more megapixels (24 vs 12MP) with a 41% higher linear resolution.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (6 vs 5 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (117x67mm vs 127x94mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 150g or 31 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 (84 percent cheaper at launch).
- More modern: Reflects 2 years and 4 months of technical progress since the A7S launch.
Arguments in favor of the Sony Alpha A7S:
- 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.
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- Easier framing: Has an electronic viewfinder for image composition and settings control.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More heavily discounted: Has been around for much longer (launched in April 2014).
If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (11 points each). 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 before making a decision 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 Sony A7S 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the X-A3 or the A7S perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Fujifilm X-A3||..||74/100||4.5/5||..||4/5||Aug 2016||399|
|Sony A7S||..||86/100||4.5/5||4.5/5||5/5||Apr 2014||2,499|
|Canon SX730||+||..||4/5||..||4/5||Apr 2017||399|
|Fujifilm X-A5||+||..||4/5||4/5||3.5/5||Jan 2018||399|
|Fujifilm X-E3||+||84/100||4.5/5||4.5/5||4.5/5||Sep 2017||899|
|Fujifilm X-T20||+ +||82/100||5/5||..||4.5/5||Jan 2017||899|
|Fujifilm X-A10||..||..||4/5||..||4/5||Dec 2016||399|
|Fujifilm X-E2S||..||77/100||4.5/5||..||4.5/5||Jan 2016||699|
|Fujifilm X-A2||..||..||4.5/5||4/5||4.5/5||Jan 2015||399|
|Fujifilm X-T10||+ +||80/100||5/5||4/5||5/5||May 2015||799|
|Nikon D750||+ +||90/100||4.5/5||5/5||4.5/5||Sep 2014||2,299|
|Panasonic TZ90||+ +||..||4/5||..||4/5||Apr 2017||449|
|Sony A7S II||+||..||4.5/5||5/5||5/5||Sep 2015||2,999|
|Sony A7||+ +||80/100||5/5||4.5/5||5/5||Oct 2013||1,699|
|Sony A7R||+ +||82/100||4.5/5||5/5||5/5||Oct 2013||2,299|
|Sony RX1R||..||..||4/5||o||4.5/5||Jun 2013||2,799|
|YI M1||..||69/100||..||2.5/5||..||Sep 2016||349|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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 are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon M50 vs Fujifilm X-A3
- Canon SX60 vs Sony A7S
- Fujifilm GFX 100 vs Fujifilm X-A3
- Fujifilm X-A3 vs Fujifilm X-T200
- Fujifilm X-A3 vs Leica V-LUX 3
- Fujifilm X-A3 vs Nikon D3
- Fujifilm X-A3 vs Panasonic GF6
- Leica D-LUX Typ 109 vs Sony A7S
- Nikon D3500 vs Sony A7S II
- Nikon D700 vs Sony A7S II
- Sony A6000 vs Sony A7S II
- Sony A7S vs Sony RX0 II
Specifications: Fujifilm X-A3 vs Sony A7S
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||Sony A7S|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Fujifilm X mount lenses||Sony E mount lenses|
|Launch Date||August 2016||April 2014|
|Launch Price||USD 399||USD 2,499|
|Sensor Specs||Fujifilm X-A3||Sony A7S|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.5 x 15.7 mm||35.8 x 23.9 mm|
|Sensor Area||368.95 mm2||855.62 mm2|
|Sensor Diagonal||28.3 mm||43 mm|
|Sensor Resolution||24 Megapixels||12 Megapixels|
|Image Resolution||6000 x 4000 pixels||4240 x 2832 pixels|
|Pixel Pitch||3.92 μm||8.45 μm|
|Pixel Density||6.50 MP/cm2||1.40 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||200 - 6,400 ISO||100 - 102,400 ISO|
|ISO Boost||100 - 25,600 ISO||50 - 409,600 ISO|
|DXO Sensor Quality (score)||..||87|
|DXO Color Depth (bits)||..||23.9|
|DXO Dynamic Range (EV)||..||13.2|
|DXO Low Light (ISO)||..||3702|
|Screen Specs||Fujifilm X-A3||Sony A7S|
|Viewfinder Type||no viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2400k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||921k dots|
|LCD Attachment||Tilting screen||Tilting screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Fujifilm X-A3||Sony A7S|
|Focus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/8000s|
|Continuous Shooting||6 shutter flaps/s||5 shutter flaps/s|
|Electronic Shutter||up to 1/32000s||YES|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Fujifilm X-A3||Sony A7S|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||micro HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Body Specs||Fujifilm X-A3||Sony A7S|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||410 shots per charge||380 shots per charge|
|In-Camera Charging||USB charging||USB charging|
117 x 67 x 40 mm
(4.6 x 2.6 x 1.6 in)
127 x 94 x 48 mm
(5.0 x 3.7 x 1.9 in)
|Camera Weight||339 g (12.0 oz)||489 g (17.2 oz)|
Did you notice an error on this page? If so, please get in touch, so that we can correct the information.