Fujifilm X-A1 vs X100S
The Fujifilm X-A1 and the Fujifilm X100S are two digital cameras that were officially introduced, respectively, in September 2013 and January 2013. The X-A1 is a mirrorless interchangeable lens camera, while the X100S is a fixed lens compact. Both cameras are equipped with an APS-C sensor. Both cameras offer a resolution of 16 megapixels.
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-A1 and the Fujifilm X100S? 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-A1 and the Fujifilm X100S is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.
The X-A1 can be obtained in two different colors (black, blue), while the X100S is also available in two color-versions, but different ones (black, silver).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Fujifilm X100S is notably larger (20 percent) than the Fujifilm X-A1. In this context, it is worth noting that neither the X-A1 nor the X100S are weather-sealed.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the X100S has a lens built in, whereas the X-A1 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the X-A1 and their specifications in the Fujinon X Lens Catalog.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.
|Fujifilm X-A1||4.6 in||2.6 in||1.5 in||11.6 oz||350||n||Sep 2013||399|
|Fujifilm X100S||5.0 in||2.9 in||2.1 in||15.7 oz||330||n||Jan 2013||1,299|
|Fujifilm X-A5||4.6 in||2.7 in||1.6 in||12.7 oz||450||n||Jan 2018||399|
|Fujifilm X100F||5.0 in||3.0 in||2.0 in||16.5 oz||390||n||Jan 2017||1,299|
|Fujifilm X-A3||4.6 in||2.6 in||1.6 in||12.0 oz||410||n||Aug 2016||399|
|Fujifilm X-A10||4.6 in||2.6 in||1.6 in||11.7 oz||410||n||Dec 2016||399|
|Fujifilm X-E2S||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Jan 2016||699|
|Fujifilm X-A2||4.6 in||2.6 in||1.6 in||12.3 oz||410||n||Jan 2015||399|
|Fujifilm X-T10||4.6 in||3.3 in||1.6 in||13.4 oz||350||n||May 2015||799|
|Fujifilm X100T||5.0 in||2.9 in||2.0 in||15.5 oz||330||n||Sep 2014||1,299|
|Fujifilm X-E2||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Oct 2013||999|
|Fujifilm X-M1||4.6 in||2.6 in||1.5 in||11.6 oz||350||n||Jun 2013||699|
|Fujifilm X-E1||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Sep 2012||999|
|Fujifilm X-Pro1||5.5 in||3.2 in||1.7 in||15.9 oz||300||n||Jan 2012||1,699|
|Fujifilm X100||5.0 in||3.0 in||2.1 in||15.7 oz||300||n||Sep 2010||1,199|
|Leica X Typ 113||5.2 in||2.9 in||3.1 in||17.1 oz||350||n||Sep 2014||2,295|
|Nikon Coolpix A||4.4 in||2.5 in||1.6 in||10.5 oz||230||n||Mar 2013||1,099|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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 imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels 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 tend to be associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Even though the X-A1 has a slightly larger sensor, both cameras offer the same resolution of 16 megapixels. This implies that the X-A1 has a lower pixel density and larger individual pixels (with a pixel pitch of 4.80μm versus 4.80μm for the X100S), which gives it a potential advantage in terms of light gathering capacity. In addition, the X-A1 is a somewhat more recent model (by 8 months) than the X100S, and its sensor might have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the X100S has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The X100S has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Fujifilm X-A1 has a native sensitivity range from ISO 200 to ISO 6400, which can be extended to ISO 100-25600. The Fujifilm X100S offers exactly the same ISO settings.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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.
| DXO |
|Leica X Typ 113||APS-C||16.1||4928||3264||1080/30p||..||..||..||..|
|Nikon Coolpix A||APS-C||16.1||4928||3264||1080/30p||23.4||13.8||1164||80|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the X100S provides a faster frame rate than the X-A1. It can shoot movie footage at 1080/60p, while the X-A1 is limited to 1080/30p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the X100S has an electronic viewfinder (2360k dots), which can be very helpful when shooting in bright sunlight. In contrast, the X-A1 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Fujifilm X-A1 and Fujifilm X100S in connection with corresponding information for a sample of similar cameras.
|Leica X Typ 113||optional||n||3.0||920||fixed||n||1/2000s||5.0||Y||n|
|Nikon Coolpix A||optional||n||3.0||921||fixed||n||1/2000s||4.0||Y||n|
The X-A1 writes its imaging data to SDHC cards, while the X100S uses 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-A1 and Fujifilm X100S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|Leica X Typ 113||Y||stereo||mono||-||-||mini||2.0||-||-||-|
|Nikon Coolpix A||Y||stereo||mono||-||-||-||2.0||-||-||-|
It is notable that the X-A1 offers wifi support, while the X100S does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Both the X-A1 and the X100S have been discontinued, but can regularly be found used on eBay. The X100S was replaced by the Fujifilm X100T, while the X-A1 was followed by the Fujifilm X-A2. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Fujifilm website.
So what is the bottom line? Which of the two cameras – the Fujifilm X-A1 or the Fujifilm X100S – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Fujifilm X-A1:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Larger screen: Has a bigger rear LCD (3.0" vs 2.8") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (920k vs 460k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
- More compact: Is smaller (117x67mm vs 127x74mm) and thus needs less room in the bag.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- More modern: Is somewhat more recent (announced 8 months after the X100S).
Advantages of the Fujifilm X100S:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Easier framing: Has an electronic viewfinder for image composition and settings control.
- Ready to shoot: Has an integrated lens, whereas the X-A1 necessitates an extra lens.
- More heavily discounted: Has been on the market for longer (launched in January 2013).
If the count of individual advantages (bullet points above) is taken as a guide, the X-A1 emerges as the winner of the contest (9 : 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 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-A1 and the Fujifilm X100S place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Prime Lens Compact Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the X-A1 or the X100S perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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-A1||..||..||4.5/5||..||4.5/5||Sep 2013||399|
|Fujifilm X100S||+ +||81/100||4.5/5||4/5||5/5||Jan 2013||1,299|
|Fujifilm X-A5||+||..||4/5||4/5||3.5/5||Jan 2018||399|
|Fujifilm X100F||+||83/100||4.5/5||..||4.5/5||Jan 2017||1,299|
|Fujifilm X-A3||..||74/100||4.5/5||..||4/5||Aug 2016||399|
|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|
|Fujifilm X100T||+||81/100||4.5/5||4.5/5||5/5||Sep 2014||1,299|
|Fujifilm X-E2||..||80/100||4.5/5||..||5/5||Oct 2013||999|
|Fujifilm X-M1||+||77/100||4.5/5||..||4.5/5||Jun 2013||699|
|Fujifilm X-E1||+ +||79/100||4.5/5||4.5/5||4.5/5||Sep 2012||999|
|Fujifilm X-Pro1||+ +||79/100||4.5/5||4/5||4.5/5||Jan 2012||1,699|
|Fujifilm X100||..||75/100||4/5||4/5||5/5||Sep 2010||1,199|
|Leica X Typ 113||..||..||3.5/5||..||4/5||Sep 2014||2,295|
|Nikon Coolpix A||+||75/100||4/5||4.5/5||4/5||Mar 2013||1,099|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
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.
Specifications: Fujifilm X-A1 vs Fujifilm X100S
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-A1||Fujifilm X100S|
|Camera Type||Mirrorless system camera||Fixed lens compact camera|
|Camera Lens||Fujifilm X mount lenses||35mm f/2.0|
|Launch Date||September 2013||January 2013|
|Launch Price||USD 399||USD 1,299|
|Sensor Specs||Fujifilm X-A1||Fujifilm X100S|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||23.5 x 15.7 mm||23.6 x 15.6 mm|
|Sensor Area||368.95 mm2||368.16 mm2|
|Sensor Diagonal||28.3 mm||28.3 mm|
|Sensor Resolution||16 Megapixels||16 Megapixels|
|Image Resolution||4896 x 3264 pixels||4896 x 3264 pixels|
|Pixel Pitch||4.80 μm||4.80 μm|
|Pixel Density||4.33 MP/cm2||4.34 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/30p Video||1080/60p Video|
|ISO Setting||200 - 6,400 ISO||200 - 6,400 ISO|
|ISO Boost||100 - 25,600 ISO||100 - 25,600 ISO|
|Image Processor||EXR Processor II||EXR Processor II|
|Screen Specs||Fujifilm X-A1||Fujifilm X100S|
|Viewfinder Type||no viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2360k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||2.8inch|
|LCD Resolution||920k dots||460k dots|
|LCD Attachment||Tilting screen||Fixed screen|
|Shooting Specs||Fujifilm X-A1||Fujifilm X100S|
|Focus System||Contrast-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||5.6 shutter flaps/s||6 shutter flaps/s|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDHC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Fujifilm X-A1||Fujifilm X100S|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro HDMI|
|Wifi Support||Wifi built-in||no Wifi|
|Body Specs||Fujifilm X-A1||Fujifilm X100S|
|Battery Life (CIPA)||350 shots per charge||330 shots per charge|
117 x 67 x 39 mm
(4.6 x 2.6 x 1.5 in)
127 x 74 x 54 mm
(5.0 x 2.9 x 2.1 in)
|Camera Weight||330 g (11.6 oz)||445 g (15.7 oz)|
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