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Fujifilm X-A1 versus Fujifilm 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 megapixel. 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: Fujifilm X-A1 vs Fujifilm X100S

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. You can also use the toggle button 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-A1 – represents the basis or 100 percent across all the size and weight measures).

Compare Fujifilm X-A1 vs Fujifilm X100S
Compare X-A1 versus X100S top
Compare X-A1 and X100S rear

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 build 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 find an overview of optics for the X-A1 and their specifications in the Fujinon X Lens Catalog.

Concerning battery life, the X-A1 gets 350 shots out of its NP-W126 battery, while the X100S can take 330 images on a single charge of its NP-95 power pack.

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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Fujifilm X-A1» 4.6 in 2.6 in 1.5 in 11.6 oz 350 n Sep 2013 399- i Fujifilm X-A1
Fujifilm X100S« 5.0 in 2.9 in 2.1 in 15.7 oz 330 n Jan 2013 1,299- i Fujifilm X100S
Fujifilm X-A5« » 4.6 in 2.7 in 1.6 in 12.7 oz 450 n Jan 2018 399 i i Fujifilm X-A5
Fujifilm X100F« » 5.0 in 3.0 in 2.0 in 16.5 oz 390 n Jan 2017 1,299 i i Fujifilm X100F
Fujifilm X-A3« » 4.6 in 2.6 in 1.6 in 12.0 oz 410 n Aug 2016 399 i i Fujifilm X-A3
Fujifilm X-A10« » 4.6 in 2.6 in 1.6 in 11.7 oz 410 n Dec 2016 399 i i Fujifilm X-A10
Fujifilm X-E2S« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Jan 2016 699- i Fujifilm X-E2S
Fujifilm X-A2« » 4.6 in 2.6 in 1.6 in 12.3 oz 410 n Jan 2015 399- i Fujifilm X-A2
Fujifilm X-T10« » 4.6 in 3.3 in 1.6 in 13.4 oz 350 n May 2015 799- i Fujifilm X-T10
Fujifilm X30« » 4.7 in 2.8 in 2.4 in 14.9 oz 470 n Aug 2014 599 i i Fujifilm X30
Fujifilm X100T« » 5.0 in 2.9 in 2.0 in 15.5 oz 330 n Sep 2014 1,299- i Fujifilm X100T
Fujifilm X-E2« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Oct 2013 999- i Fujifilm X-E2
Fujifilm X-M1« » 4.6 in 2.6 in 1.5 in 11.6 oz 350 n Jun 2013 699- i Fujifilm X-M1
Fujifilm X-E1« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Sep 2012 999- i Fujifilm X-E1
Fujifilm X-Pro1« » 5.5 in 3.2 in 1.7 in 15.9 oz 300 n Jan 2012 1,699- i Fujifilm X-Pro1
Fujifilm X100« » 5.0 in 3.0 in 2.1 in 15.7 oz 300 n Sep 2010 1,199- i Fujifilm X100
Leica X Typ 113« » 5.2 in 2.9 in 3.1 in 17.1 oz 350 n Sep 2014 2,295 i i Leica X Typ 113

The camera’s price is obviously a critical decision-making factor. 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.

 

Sensor comparison: Fujifilm X-A1 vs Fujifilm X100S

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.

Fujifilm X-A1 and Fujifilm X100S sensor measures

Even though the X-A1 has a slightly larger sensor, both cameras offer the same resolution of 16 megapixel. 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.

X-A1 versus X100S MP

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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Fujifilm X-A1» APS-C 16.0 4896 32641080/30p----Fujifilm X-A1
Fujifilm X100S« APS-C 16.0 4896 32641080/60p----Fujifilm X100S
Fujifilm X-A5« » APS-C 24.0 6000 40004K/15p----Fujifilm X-A5
Fujifilm X100F« » APS-C 24.0 6000 40001080/60p----Fujifilm X100F
Fujifilm X-A3« » APS-C 24.0 6000 40001080/60p----Fujifilm X-A3
Fujifilm X-A10« » APS-C 16.0 4896 32641080/30p----Fujifilm X-A10
Fujifilm X-E2S« » APS-C 16.0 4896 32641080/60p----Fujifilm X-E2S
Fujifilm X-A2« » APS-C 16.0 4896 32641080/30p----Fujifilm X-A2
Fujifilm X-T10« » APS-C 16.0 4896 32641080/60p----Fujifilm X-T10
Fujifilm X30« » 2/3 12.0 4000 30001080/60p----Fujifilm X30
Fujifilm X100T« » APS-C 16.0 4896 32641080/60p----Fujifilm X100T
Fujifilm X-E2« » APS-C 16.0 4896 32641080/60p----Fujifilm X-E2
Fujifilm X-M1« » APS-C 16.0 4896 32641080/30p----Fujifilm X-M1
Fujifilm X-E1« » APS-C 16.0 4896 32641080/24p----Fujifilm X-E1
Fujifilm X-Pro1« » APS-C 16.0 4896 32641080/24p----Fujifilm X-Pro1
Fujifilm X100« » APS-C 12.2 4288 2848720/30p22.912.4100173Fujifilm X100
Leica X Typ 113« » APS-C 16.1 4928 32641080/30p----Leica X Typ 113

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.

 

Feature comparison: Fujifilm X-A1 vs Fujifilm X100S

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. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Fujifilm X-A1»- n 3.0 920 tilting n 4000 5.6 Y n Fujifilm X-A1
Fujifilm X100S«2360 n 2.8 460 fixed n 4000 6.0 Y n Fujifilm X100S
Fujifilm X-A5« »- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A5
Fujifilm X100F« »2360 n 3.0 1040 fixed n 4000 8.0 Y n Fujifilm X100F
Fujifilm X-A3« »- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A3
Fujifilm X-A10« »- n 3.0 1040 tilting n 4000 6.0 Y n Fujifilm X-A10
Fujifilm X-E2S« »2360 n 3.0 1040 fixed n 4000 7.0 Y n Fujifilm X-E2S
Fujifilm X-A2« »- n 3.0 920 tilting n 4000 5.6 Y n Fujifilm X-A2
Fujifilm X-T10« »2360 n 3.0 920 tilting n 4000 8.0 Y n Fujifilm X-T10
Fujifilm X30« »2360 n 3.0 920 tilting n 4000 12.0 Y Y Fujifilm X30
Fujifilm X100T« »2360 n 3.0 1040 fixed n 4000 6.0 Y n Fujifilm X100T
Fujifilm X-E2« »2360 n 3.0 1040 fixed n 4000 7.0 Y n Fujifilm X-E2
Fujifilm X-M1« »- n 3.0 920 tilting n 4000 5.6 Y n Fujifilm X-M1
Fujifilm X-E1« »2360 n 2.8 460 fixed n 4000 6.0 Y n Fujifilm X-E1
Fujifilm X-Pro1« »1440 n 3.0 1230 fixed n 4000 6.0 n n Fujifilm X-Pro1
Fujifilm X100« »1440 n 2.8 460 fixed n 4000 5.0 Y n Fujifilm X100
Leica X Typ 113« »- n 3.0 920 fixed n 2000 5.0 Y n Leica X Typ 113

The X-A1 writes its imaging data to SDHC cards, while the X100S uses SDXC cards.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Fujifilm X-A1»Ystereomono--mini2.0Y--Fujifilm X-A1
Fujifilm X100S«Ystereomono--micro2.0---Fujifilm X100S
Fujifilm X-A5« »YstereomonoY-mini2.0Y-YFujifilm X-A5
Fujifilm X100F« »YstereomonoY-micro2.0Y--Fujifilm X100F
Fujifilm X-A3« »Ystereomono--micro2.0Y--Fujifilm X-A3
Fujifilm X-A10« »-stereomono--mini2.0Y--Fujifilm X-A10
Fujifilm X-E2S« »YstereomonoY-micro2.0Y--Fujifilm X-E2S
Fujifilm X-A2« »Ystereomono--mini2.0Y--Fujifilm X-A2
Fujifilm X-T10« »Ystereomono--micro2.0Y--Fujifilm X-T10
Fujifilm X30« »Ystereomono--micro2.0Y--Fujifilm X30
Fujifilm X100T« »YstereomonoY-micro2.0Y--Fujifilm X100T
Fujifilm X-E2« »YstereomonoY-micro2.0Y--Fujifilm X-E2
Fujifilm X-M1« »Ystereomono--mini2.0Y--Fujifilm X-M1
Fujifilm X-E1« »YstereomonoY-mini2.0---Fujifilm X-E1
Fujifilm X-Pro1« »Ystereomono--mini2.0---Fujifilm X-Pro1
Fujifilm X100« »Ystereo---mini2.0---Fujifilm X100
Leica X Typ 113« »Ystereomono--mini2.0---Leica X Typ 113

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.

Review summary: Fujifilm X-A1 vs Fujifilm X100S

So what is the bottom line? Which of the two cameras – the Fujifilm X-A1 or the Fujifilm X100S – has the upper hand? 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 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 build 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).
  • Easier framing: Has an electronic viewfinder for image framing 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 (8 : 5 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.

X-A1 08:05 X100S

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 X-A1 or the X100S handle or 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 table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Fujifilm X-A1»--4.5/5-4.5/5 Sep 2013 399- i Fujifilm X-A1
Fujifilm X100S«HiRec81/1004.5/54/55/5 Jan 2013 1,299- i Fujifilm X100S
Fujifilm X-A5« »Rec-4/54/53.5/5 Jan 2018 399 i i Fujifilm X-A5
Fujifilm X100F« »Rec83/1004.5/5-4.5/5 Jan 2017 1,299 i i Fujifilm X100F
Fujifilm X-A3« »-74/1004.5/5-4/5 Aug 2016 399 i i Fujifilm X-A3
Fujifilm X-A10« »--4/5-4/5 Dec 2016 399 i i Fujifilm X-A10
Fujifilm X-E2S« »-77/1004.5/5-4.5/5 Jan 2016 699- i Fujifilm X-E2S
Fujifilm X-A2« »--4.5/54/54.5/5 Jan 2015 399- i Fujifilm X-A2
Fujifilm X-T10« »HiRec80/1005/54/55/5 May 2015 799- i Fujifilm X-T10
Fujifilm X30« »-76/1004.5/54/54.5/5 Aug 2014 599 i i Fujifilm X30
Fujifilm X100T« »Rec81/1004.5/54.5/55/5 Sep 2014 1,299- i Fujifilm X100T
Fujifilm X-E2« »-80/1004.5/5-5/5 Oct 2013 999- i Fujifilm X-E2
Fujifilm X-M1« »Rec77/1004.5/5-4.5/5 Jun 2013 699- i Fujifilm X-M1
Fujifilm X-E1« »HiRec79/1004.5/54.5/54.5/5 Sep 2012 999- i Fujifilm X-E1
Fujifilm X-Pro1« »HiRec79/1004.5/54/54.5/5 Jan 2012 1,699- i Fujifilm X-Pro1
Fujifilm X100« »-75/1004/54/55/5 Sep 2010 1,199- i Fujifilm X100
Leica X Typ 113« »--3.5/5-4/5 Sep 2014 2,295 i i Leica X Typ 113

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. 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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