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Sony A7R III versus Fujifilm X100

The Sony Alpha A7R III and the Fujifilm FinePix X100 are two enthusiast cameras that were announced, respectively, in October 2017 and September 2010. The A7R III is a mirrorless interchangeable lens camera, while the X100 is a fixed lens compact. The cameras are based on a full frame (A7R III) and an APS-C (X100) sensor. The Sony has a resolution of 42.2 megapixel, whereas the Fujifilm provides 12.2 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 A7R III vs Fujifilm X100

The physical size and weight of the Sony A7R III and the Fujifilm X100 are illustrated in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth 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 A7R III – represents the basis or 100 percent across all the size and weight measures).

Snapsort Sony A7R III vs Fujifilm X100
Compare A7R III versus X100 top
Compare A7R III and X100 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Fujifilm X100 is notably smaller (22 percent) than the Sony A7R III. It is worth mentioning in this context that the A7R III is splash and dust resistant, while the X100 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the X100 has a lens build in, whereas the A7R III 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 A7R III and their specifications in the Sony FE Lens Catalog.

Concerning battery life, the A7R III gets 650 shots out of its NP-FZ100 battery, while the X100 can take 300 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. 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
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)
Sony A7R III» 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i
Fujifilm X100« 5.0 in 3.0 in 2.1 in 15.7 oz 300 n Sep 2010 1,199- i
Canon G1 X« » 4.6 in 3.2 in 2.6 in 18.8 oz 250 n Jan 2012 799- i
Fujifilm X30« » 4.7 in 2.8 in 2.4 in 14.9 oz 470 n Aug 2014 599 i i
Fujifilm X100S« » 5.0 in 2.9 in 2.1 in 15.7 oz 330 n Jan 2013 1,299- i
Hasselblad X1D« » 5.9 in 3.9 in 2.8 in 25.6 oz .. Y Jun 2016 8,995 i i
Panasonic LX100« » 4.5 in 2.6 in 2.2 in 13.9 oz 300 n Sep 2014 899 i i
Panasonic GH1« » 4.9 in 3.5 in 1.8 in 13.6 oz 300 n Mar 2009 1,499- i
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i
Sony A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i i
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399 i i
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i
Sony A99« » 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799- i

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. The X100 was launched at a lower price than the A7R III, despite having a lens build in. 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 A7R III vs Fujifilm X100

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color depth than smaller pixels 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 A7R III features a full frame sensor and the Fujifilm X100 an APS-C sensor. The sensor area in the X100 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A7R III and Fujifilm X100 sensor measures

With 42.2MP, the A7R III offers a higher resolution than the X100 (12.2MP), but the A7R III has smaller individual pixels (pixel pitch of 4.52μm versus 5.53μm for the X100). However, the A7R III is a somewhat more recent model (by 7 years and 1 month) than the X100, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

Unlike the X100, 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).

A7R III versus X100 MP

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. Of the two cameras under review, the A7R III provides substantially higher image quality than the X100, with an overall score that is 27 points higher. This advantage is based on 3.1 bits higher color depth, 2.3 EV in additional dynamic range, and 1.8 stops in additional low light sensitivity. 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
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony A7R III» Full Frame 42.2 7952 53044K/30p26.014.73523100
Fujifilm X100« APS-C 12.2 4288 2848720/30p22.912.4100173
Canon G1 X« » 1.5-inch 14.2 4352 32641080/24p21.710.864460
Fujifilm X30« » 2/3 12.0 4000 30001080/60p----
Fujifilm X100S« » APS-C 16.0 4896 32641080/60p----
Hasselblad X1D« » Medium Format 51.3 8272 62001080/25p26.214.84489102
Panasonic LX100« » Four Thirds 12.7 4112 30884K/30p22.312.555367
Panasonic GH1« » Four Thirds 12.0 4000 30001080/24p21.611.677264
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096
Sony A9« » Full Frame 24.0 6000 40004K/30p24.913.3351792
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695
Sony A99« » Full Frame 24.0 6000 40001080/60p25.014.0155589

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7R III provides a higher video resolution than the X100. It can shoot video footage at 4K/30p, while the Fujifilm is limited to 720/30p.

 

Feature comparison: Sony A7R III vs Fujifilm X100

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the A7R III offers a substantially higher resolution than the one in the X100 (3686k vs 1440k dots). The following table reports on some other key feature differences and similarities of the Sony A7R III, the Fujifilm X100, and comparable cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
  Camera 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
Sony A7R III»3686 n 3.0 1440 tilting Y 8000 10.0 n Y
Fujifilm X100«1440 n 2.8 460 fixed n 4000 5.0 Y n
Canon G1 X« »optical n 3.0 922 Swivel n 4000 1.9 Y Y
Fujifilm X30« »2360 n 3.0 920 tilting n 4000 12.0 Y Y
Fujifilm X100S« »2360 n 2.8 460 fixed n 4000 6.0 Y n
Hasselblad X1D« »2360 n 3.0 920 fixed Y 2000 2.3 n n
Panasonic LX100« »2764 n 3.0 921 fixed n 4000 11.0 n Y
Panasonic GH1« »1440 n 3.0 460 swivel n 4000 3.0 Y n
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y
Sony A9« »3686 n 3.0 1440 tilting Y 8000 20.0 n Y
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7S II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y
Sony A7R« »2400 n 3.0 1230 tilting n 8000 4.0 n n
Sony A99« »2359 Y 3.0 1229 full-flex n 8000 6.0 n Y

The A7R III is a current model that online retailers, such as amazon, will have in stock. In contrast, the X100 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the X100 was succeeded by the Fujifilm X100S.

Review summary: Sony A7R III vs Fujifilm X100

So what conclusions can be drawn? Which of the two cameras – the Sony A7R III or the Fujifilm X100 – has the upper hand? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Sony Alpha A7R III:

  • More detail: Offers more megapixels (42.2 vs 12.2MP) with a 86% higher linear resolution.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Scores substantially higher (27 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (3.1 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (2.3 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.8 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 720/30p).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 1440k dots).
  • 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 (1440k vs 460k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Longer lasting: Can take more shots (650 versus 300) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More modern: Reflects 7 years and 1 month of technical progress since the X100 launch.

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Reasons to prefer the Fujifilm FinePix X100:

  • Ready to shoot: Has an integrated lens, whereas the A7R III necessitates an extra lens.
  • More compact: Is smaller (126x75mm vs 127x96mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the A7R III).
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced at a lower price, despite coming with a build-in lens.
  • More heavily discounted: Has been around for much longer (launched in September 2010).

If the number of relative strengths (bullet points above) is taken as a guide, the A7R III is the clear winner of the match-up (19 : 6 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera.

A7R III 19:06 X100

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the A7R III and the X100 in practical situations. 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 expert reviews are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.

Review scores
  Camera cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Sony A7R III»HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i
Fujifilm X100«-75/1004/54/55/5 Sep 2010 1,199- i
Canon G1 X« »Rec76/1004/54/54.5/5 Jan 2012 799- i
Fujifilm X30« »-76/1004.5/54/54.5/5 Aug 2014 599 i i
Fujifilm X100S« »HiRec81/1004.5/54/55/5 Jan 2013 1,299- i
Hasselblad X1D« »rev---4/5 Jun 2016 8,995 i i
Panasonic LX100« »HiRec85/1005/54/55/5 Sep 2014 899 i i
Panasonic GH1« »HiRec72/1004.5/55/54.5/5 Mar 2009 1,499- i
Sony A7 III« »HiRec89/1005/5-5/5 Feb 2018 1,999 i i
Sony A9« »HiRec89/1005/55/55/5 Apr 2017 4,499 i i
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i
Sony A7S II« »Rec-4.5/55/55/5 Sep 2015 2,999 i i
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i
Sony A7R« »HiRec82/1004.5/55/55/5 Oct 2013 2,299- i
Sony A99« »-84/1004.5/5rev4.5/5 Sep 2012 2,799- i

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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, 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? 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 send me an email, and I will try to locate and add the respective data to the application.

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