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Sony RX100 IV versus Fujifilm X-A2

The Sony Cyber-shot DSC-RX100 IV and the Fujifilm X-A2 are two digital cameras that were announced, respectively, in June 2015 and January 2015. The RX100 IV is a fixed lens compact, while the X-A2 is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (RX100 IV) and an APS-C (X-A2) sensor. The Sony has a resolution of 20 megapixel, whereas the Fujifilm provides 16 MP. 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: Sony RX100 IV vs Fujifilm X-A2

The side-by-side display below illustrates the physical size and weight of the Sony RX100 IV and the Fujifilm X-A2. Three consecutive views from the front, the top, and the rear side are shown. 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 side – the RX100 IV – represents the basis for the calculations across all the size and weight measures).

Compare Sony RX100 IV vs Fujifilm X-A2
RX100 IV versus X-A2 top view
RX100 IV and X-A2 rear side
Body view (RX100 IV on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Fujifilm X-A2 is notably larger (33 percent) than the Sony RX100 IV. In this context, it is worth noting that neither the RX100 IV nor the X-A2 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 IV has a lens build in, whereas the X-A2 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-A2 and their specifications in the Fujinon X Lens Catalog.

Concerning battery life, the RX100 IV gets 280 shots out of its NP-BX1 battery, while the X-A2 can take 410 images on a single charge of its NP-W126 power pack.

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 camera comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony RX100 IV (⇒ rgt) 102 mm 58 mm 41 mm 298 g 280 no 2015 999discont. check
Fujifilm X-A2 (⇒ lft) 117 mm 67 mm 40 mm 350 g 410 no 2015 399discont. check
Canon M5 (⇒ lft | rgt) 116 mm 89 mm 61 mm 427 g 295 no 2016 979 latest check
Canon G7 X (⇒ lft | rgt) 103 mm 60 mm 40 mm 304 g 210 no 2014 699discont. check
Fujifilm X70 (⇒ lft | rgt) 113 mm 64 mm 44 mm 340 g 330 no 2016 799 latest check
Fujifilm X-A3 (⇒ lft | rgt) 117 mm 67 mm 40 mm 339 g 410 no 2016 399 latest check
Fujifilm X-A10 (⇒ lft | rgt) 117 mm 67 mm 40 mm 331 g 410 no 2016 399 latest check
Fujifilm X-E2 (⇒ lft | rgt) 129 mm 75 mm 37 mm 350 g 350 no 2013 999discont. check
Fujifilm X-A1 (⇒ lft | rgt) 117 mm 67 mm 39 mm 330 g 350 no 2013 399discont. check
Leica Q Typ 116 (⇒ lft | rgt) 130 mm 80 mm 93 mm 640 g 300 no 2015 4,249 latest check
Panasonic FZ1000 (⇒ lft | rgt) 137 mm 99 mm 131 mm 831 g 360 no 2014 899discont. check
Sony RX100 V (⇒ lft | rgt) 102 mm 58 mm 41 mm 299 g 220 no 2016 999 latest check
Sony A6000 (⇒ lft | rgt) 120 mm 67 mm 45 mm 344 g 360 no 2014 599discont. check
Sony RX100 III (⇒ lft | rgt) 102 mm 58 mm 41 mm 290 g 320 no 2014 799discont. check
Sony A5100 (⇒ lft | rgt) 110 mm 63 mm 36 mm 283 g 400 no 2014 549 latest check
Sony A5000 (⇒ lft | rgt) 110 mm 63 mm 36 mm 269 g 420 no 2014 449discont. check
Sony RX100 II (⇒ lft | rgt) 102 mm 58 mm 38 mm 281 g 350 no 2013 749discont. check

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. 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: Sony RX100 IV vs Fujifilm X-A2

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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the 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 Sony RX100 IV features an one-inch sensor and the Fujifilm X-A2 an APS-C sensor. The sensor area in the X-A2 is 217 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony RX100 IV and Fujifilm X-A2 sensor measures
Sensor size

Despite having a smaller sensor, the Sony RX100 IV offers a higher resolution of 20 megapixel, compared with 16 MP of the Fujifilm X-A2. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 4.80μm for the X-A2). However, it should be noted that the RX100 IV is a somewhat more recent model (by 4 months) than the X-A2, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.

RX100 IV versus X-A2 MP
Sensor resolution

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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony RX100 IV (⇒ rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.6 591 70
Fujifilm X-A2 (⇒ lft) APS-C 16.0 4896 3264 1080/30p - - - -
Canon M5 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.4 12.4 1262 77
Canon G7 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 23.0 12.7 556 71
Fujifilm X70 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Fujifilm X-A3 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p - - - -
Fujifilm X-A10 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/30p - - - -
Fujifilm X-E2 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Fujifilm X-A1 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/30p - - - -
Leica Q Typ 116 (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.3 12.7 2221 85
Panasonic FZ1000 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.1 11.7 517 64
Sony RX100 V (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.4 586 70
Sony A6000 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.1 13.1 1347 82
Sony RX100 III (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.4 12.3 495 67
Sony A5100 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.8 12.7 1347 80
Sony A5000 (⇒ lft | rgt) APS-C 19.8 5456 3632 1080/60i 23.8 13.0 1089 79
Sony RX100 II (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.5 12.4 483 67

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the RX100 IV provides a higher video resolution than the X-A2. It can shoot video footage at 4K/30p, while the Fujifilm is limited to 1080/30p.

Feature comparison: Sony RX100 IV vs Fujifilm X-A2

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the RX100 IV has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the X-A2 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Sony RX100 IV, the Fujifilm X-A2, and comparable cameras. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Sony RX100 IV (⇒ rgt) 2359 no 3.0 1228 tilting no 2000 16.0 10.2 YES
Fujifilm X-A2 (⇒ lft) no no 3.0 920 tilting no 4000 5.6 7 no
Canon M5 (⇒ lft | rgt) 2360 no 3.2 1620 tilting YES 4000 9.0 5 no
Canon G7 X (⇒ lft | rgt) no no 3.0 1040 tilting YES 2000 6.5 7 YES
Fujifilm X70 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 8.0 7.9 ..
Fujifilm X-A3 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 6.0 7 no
Fujifilm X-A10 (⇒ lft | rgt) no no 3.0 1040 tilting no 4000 6.0 5 no
Fujifilm X-E2 (⇒ lft | rgt) 2360 no 3.0 1040 fixed no 4000 7.0 7 no
Fujifilm X-A1 (⇒ lft | rgt) no no 3.0 920 tilting no 4000 5.6 7 no
Leica Q Typ 116 (⇒ lft | rgt) 3680 no 3.0 1040 fixed YES 2000 10.0 no no
Panasonic FZ1000 (⇒ lft | rgt) 2359 no 3.0 921 swivel no 4000 12.0 13.5 YES
Sony RX100 V (⇒ lft | rgt) 2359 no 3.0 1229 tilting no 2000 24.0 10.2 YES
Sony A6000 (⇒ lft | rgt) 1440 no 3.0 922 tilting no 4000 11.0 6 no
Sony RX100 III (⇒ lft | rgt) 1440 no 3.0 1229 tilting no 2000 10.0 YES YES
Sony A5100 (⇒ lft | rgt) no no 3.0 922 tilting YES 4000 6.0 4 no
Sony A5000 (⇒ lft | rgt) no no 3.0 461 tilting no 4000 3.5 4 no
Sony RX100 II (⇒ lft | rgt) no no 3.0 1229 tilting no 2000 10.0 15 YES

Both the RX100 IV and the X-A2 have been discontinued, but can regularly be found used on eBay. The X-A2 was replaced by the Fujifilm X-A3, while the RX100 IV was followed by the Sony RX100 V.

Review summary: Sony RX100 IV vs Fujifilm X-A2

So how do things add up? Is the Sony RX100 IV better than the Fujifilm X-A2 or vice versa? The listing below highlights the relative strengths of the two models.


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Reasons to prefer the Sony Cyber-shot DSC-RX100 IV:

  • More detail: Offers more megapixels (20 vs 16MP) with a 12% higher linear resolution.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1228k vs 920k dots).
  • Faster burst: Shoots at higher frequency (16 vs 5.6 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has a lens build-in, whereas the X-A2 requires a separate lens.
  • More compact: Is smaller (102x58mm vs 117x67mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the X-A2).
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More modern: Is somewhat more recent (announced 4 months after the X-A2).

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Arguments in favor of the Fujifilm X-A2:

  • Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 2000/sec) to freeze action.
  • More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
  • Longer lasting: Gets more shots (410 versus 280) out of a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in January 2015).

If the count of relative strengths (bullet points above) is taken as a measure, the RX100 IV is the clear winner of the match-up (10 : 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.

RX100 IV 10:05 X-A2

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 RX100 IV or the X-A2 handle or 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 rankings of the cameras as published by some of the major camera review sites. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
.com
dp
review
.com
ephoto
zine
.com
imaging
resource
.com
photography
blog
.com
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony RX100 IV (⇒ rgt) HiRec 85/100 Gold 4/5 4.5/5 4.5/5 2015 999discont. check
Fujifilm X-A2 (⇒ lft) - - 4.5/5 4/5 4.5/5 2015 399discont. check
Canon M5 (⇒ lft | rgt) Rec 82/100 Silver 4/5 4.5/5 4/5 2016 979 latest check
Canon G7 X (⇒ lft | rgt) HiRec 77/100 Silver 4.5/5 3.5/5 4.5/5 2014 699discont. check
Fujifilm X70 (⇒ lft | rgt) - 76/100 4.5/5 4/5 4.5/5 2016 799 latest check
Fujifilm X-A3 (⇒ lft | rgt) - 74/100 4.5/5 - 4/5 2016 399 latest check
Fujifilm X-A10 (⇒ lft | rgt) - - 4/5 - 4/5 2016 399 latest check
Fujifilm X-E2 (⇒ lft | rgt) - 80/100 Gold 4.5/5 - 5/5 2013 999discont. check
Fujifilm X-A1 (⇒ lft | rgt) - - 4.5/5 - 4.5/5 2013 399discont. check
Leica Q Typ 116 (⇒ lft | rgt) - 80/100 Silver 4.5/5 - 4.5/5 2015 4,249 latest check
Panasonic FZ1000 (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 4.5/5 2014 899discont. check
Sony RX100 V (⇒ lft | rgt) HiRec 83/100 Silver 4/5 5/5 4.5/5 2016 999 latest check
Sony A6000 (⇒ lft | rgt) Rec 80/100 Gold 4.5/5 5/5 5/5 2014 599discont. check
Sony RX100 III (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 5/5 2014 799discont. check
Sony A5100 (⇒ lft | rgt) Rec - 4.5/5 4.5/5 5/5 2014 549 latest check
Sony A5000 (⇒ lft | rgt) Rec - 4.5/5 reviewed 4.5/5 2014 449discont. check
Sony RX100 II (⇒ lft | rgt) HiRec 79/100 Silver 4.5/5 5/5 4.5/5 2013 749discont. check

Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price 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.


Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please contact me, and I will try to locate and add the respective data to the application.

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