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Sony A5100 versus Fujifilm X-T20

The Sony Alpha A5100 and the Fujifilm X-T20 are two digital cameras that were officially introduced, respectively, in August 2014 and January 2017. Both the A5100 and the X-T20 are mirrorless interchangeable lens cameras that are equipped with an APS-C sensor. Both cameras offer a resolution of 24 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: Sony A5100 vs Fujifilm X-T20

The side-by-side display below illustrates the physical size and weight of the Sony A5100 and the Fujifilm X-T20. 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 dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the A5100 – represents 100 percent across all the size and weight measures).

Compare Sony A5100 vs Fujifilm X-T20
Compare A5100 versus X-T20 top
Compare A5100 and X-T20 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Fujifilm X-T20 is notably larger (41 percent) than the Sony A5100. Moreover, the X-T20 is substantially heavier (35 percent) than the A5100. In this context, it is worth noting that neither the A5100 nor the X-T20 are weather-sealed.

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. Yet, since both cameras are based around an APS-C sensor, their respective lenses will tend to have similar dimensions and heft. You can find an overview of optics for the two cameras in the Sony E-Mount Lens Catalog (A5100) and the Fujinon X Lens Catalog (X-T20). 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 A5100 gets 400 shots out of its NP-FW50 battery, while the X-T20 can take 350 images on a single charge of its NP-W126S power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras 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)
Camera
Model
Sony A5100» 4.3 in 2.5 in 1.4 in 10.0 oz 400 n Aug 2014 549 i i Sony A5100
Fujifilm X-T20« 4.6 in 3.3 in 1.6 in 13.5 oz 350 n Jan 2017 899 i i Fujifilm X-T20
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 X-T100« » 4.8 in 3.3 in 1.9 in 15.8 oz 430 n May 2018 599 i i Fujifilm X-T100
Fujifilm X-E3« » 4.8 in 2.9 in 1.7 in 11.9 oz 350 n Sep 2017 899 i i Fujifilm X-E3
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-T10« » 4.6 in 3.3 in 1.6 in 13.4 oz 350 n May 2015 799- i Fujifilm X-T10
Sony RX100 IV« » 4.0 in 2.3 in 1.6 in 10.5 oz 280 n Jun 2015 999- i Sony RX100 IV
Sony A5000« » 4.3 in 2.5 in 1.4 in 9.5 oz 420 n Jan 2014 449- i Sony A5000
Sony A6000« » 4.7 in 2.6 in 1.8 in 12.1 oz 360 n Feb 2014 599- i Sony A6000
Sony RX100 III« » 4.0 in 2.3 in 1.6 in 10.2 oz 320 n May 2014 799- i Sony RX100 III
Sony A3000« » 5.0 in 3.6 in 3.3 in 14.5 oz 470 n Aug 2013 329- i Sony A3000
Sony NEX-3N« » 4.3 in 2.4 in 1.4 in 9.5 oz 480 n Feb 2013 499- i Sony NEX-3N
Sony RX100 II« » 4.0 in 2.3 in 1.5 in 9.9 oz 350 n Jun 2013 749- i Sony RX100 II
Sony NEX-F3« » 4.6 in 2.6 in 1.7 in 11.1 oz 470 n May 2012 599- i Sony NEX-F3
Sony RX100« » 4.0 in 2.3 in 1.4 in 8.5 oz 330 n Jun 2012 649- i Sony RX100
Sony NEX-3« » 4.6 in 2.4 in 1.3 in 10.5 oz 330 n May 2010 599- i Sony NEX-3

Any camera purchase will naturally be influenced heavily by the price. 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 A5100 was launched at a markedly lower price (by 39 percent) than the X-T20, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Sony A5100 vs Fujifilm X-T20

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 tend to be more expensive and lead to bigger and heavier cameras 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.

In terms of underlying technology, both cameras are build around CMOS sensors.

Sony A5100 and Fujifilm X-T20 sensor measures

Even though the X-T20 has a slightly larger sensor, both cameras offer the same resolution of 24 megapixel. This implies that the X-T20 has a lower pixel density and marginally larger individual pixels (with a pixel pitch of 3.92μm versus 3.91μm for the A5100), which gives it a potential advantage in terms of light gathering capacity. In addition, the X-T20 is much more recent (by 2 years and 5 months) than the A5100, and its sensor will have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the X-T20 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

A5100 versus X-T20 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Sony A5100» APS-C 24.0 6000 40001080/60p23.812.7134780Sony A5100
Fujifilm X-T20« APS-C 24.0 6000 40004K/30p----Fujifilm X-T20
Fujifilm X-A5« » APS-C 24.0 6000 40004K/15p----Fujifilm X-A5
Fujifilm X-T100« » APS-C 24.0 6000 40004K/15p----Fujifilm X-T100
Fujifilm X-E3« » APS-C 24.0 6000 40004K/30p----Fujifilm X-E3
Fujifilm X-A3« » APS-C 24.0 6000 40001080/60p----Fujifilm X-A3
Fujifilm X-T10« » APS-C 16.0 4896 32641080/60p----Fujifilm X-T10
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170Sony RX100 IV
Sony A5000« » APS-C 19.8 5456 36321080/60i23.813.0108979Sony A5000
Sony A6000« » APS-C 24.0 6000 40001080/60p24.113.1134782Sony A6000
Sony RX100 III« » 1-inch 20.0 5472 36481080/60p22.412.349567Sony RX100 III
Sony A3000« » APS-C 19.8 5456 36321080/60i23.712.8106878Sony A3000
Sony NEX-3N« » APS-C 16.0 4912 32641080/60i22.812.5106774Sony NEX-3N
Sony RX100 II« » 1-inch 20.0 5472 36481080/60p22.512.448367Sony RX100 II
Sony NEX-F3« » APS-C 16.0 4912 32641080/60i22.712.3111473Sony NEX-F3
Sony RX100« » 1-inch 20.0 5472 36481080/60p22.612.439066Sony RX100
Sony NEX-3« » APS-C 14.0 4592 3056720/30p22.112.083068Sony NEX-3

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the X-T20 provides a better video resolution than the A5100. It can shoot movie footage at 4K/30p, while the Sony is limited to 1080/60p.

 

Feature comparison: Sony A5100 vs Fujifilm X-T20

Apart from body and sensor, cameras can and do differ across a range of features. For example, the X-T20 has an electronic viewfinder (2360k dots), which can be very helpful when shooting in bright sunlight. In contrast, the A5100 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 A5100, the Fujifilm X-T20, and comparable cameras. The full specs-sheets can be found in the camera manual or in the dpreview camera hub.

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
Sony A5100»- n 3.0 922 tilting Y 4000 6.0 Y n Sony A5100
Fujifilm X-T20«2360 n 3.0 1040 tilting Y 4000 8.0 Y n Fujifilm X-T20
Fujifilm X-A5« »- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A5
Fujifilm X-T100« »2360 n 3.0 1040 full-flex Y 4000 6.0 Y n Fujifilm X-T100
Fujifilm X-E3« »2360 n 3.0 1040 fixed Y 4000 8.0 n n Fujifilm X-E3
Fujifilm X-A3« »- n 3.0 1040 tilting Y 4000 6.0 Y n Fujifilm X-A3
Fujifilm X-T10« »2360 n 3.0 920 tilting n 4000 8.0 Y n Fujifilm X-T10
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y Sony RX100 IV
Sony A5000« »- n 3.0 461 tilting n 4000 3.5 Y n Sony A5000
Sony A6000« »1440 n 3.0 922 tilting n 4000 11.0 Y n Sony A6000
Sony RX100 III« »1440 n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 III
Sony A3000« »202 n 3.0 230 fixed n 4000 2.5 Y n Sony A3000
Sony NEX-3N« »- n 3.0 460 tilting n 4000 4.0 Y n Sony NEX-3N
Sony RX100 II« »- n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 II
Sony NEX-F3« »- n 3.0 920 tilting n 4000 5.5 Y n Sony NEX-F3
Sony RX100« »- n 3.0 1229 fixed n 2000 10.0 Y Y Sony RX100
Sony NEX-3« »- n 3.0 920 tilting n 4000 7.0 n n Sony NEX-3

Both the A5100 and the X-T20 are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The A5100 replaced the earlier Sony A5000, while the X-T20 followed on from the Fujifilm X-T10.

Review summary: Sony A5100 vs Fujifilm X-T20

So what conclusions can be drawn? Which of the two cameras – the Sony A5100 or the Fujifilm X-T20 – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.

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Reasons to prefer the Sony Alpha A5100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More compact: Is smaller (110x63mm vs 118x83mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 100g or 26 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (400 versus 350) on a single battery charge.
  • More affordable: Was introduced into a lower priced category (39 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2014).

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Arguments in favor of the Fujifilm X-T20:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
  • Faster burst: Shoots at higher frequency (8 vs 6 flaps/sec) to capture the decisive moment.
  • More modern: Reflects 2 years and 5 months of technical progress since the A5100 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (6 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.

A5100 06:06 X-T20

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the A5100 or the X-T20. 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 table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available 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
Sony A5100»Rec-4.5/54.5/55/5 Aug 2014 549 i i Sony A5100
Fujifilm X-T20«HiRec82/1005/5-4.5/5 Jan 2017 899 i i Fujifilm X-T20
Fujifilm X-A5« »Rec-4/54/53.5/5 Jan 2018 399 i i Fujifilm X-A5
Fujifilm X-T100« »Rec79/1004/5-4.5/5 May 2018 599 i i Fujifilm X-T100
Fujifilm X-E3« »Rec84/1004.5/54.5/54.5/5 Sep 2017 899 i i Fujifilm X-E3
Fujifilm X-A3« »-74/1004.5/5-4/5 Aug 2016 399 i i Fujifilm X-A3
Fujifilm X-T10« »HiRec80/1005/54/55/5 May 2015 799- i Fujifilm X-T10
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i Sony RX100 IV
Sony A5000« »Rec-4.5/5rev4.5/5 Jan 2014 449- i Sony A5000
Sony A6000« »Rec80/1004.5/55/55/5 Feb 2014 599- i Sony A6000
Sony RX100 III« »HiRec82/1004.5/54.5/55/5 May 2014 799- i Sony RX100 III
Sony A3000« »Rec-4/54.5/54/5 Aug 2013 329- i Sony A3000
Sony NEX-3N« »--4.5/54/54.5/5 Feb 2013 499- i Sony NEX-3N
Sony RX100 II« »HiRec79/1004.5/55/54.5/5 Jun 2013 749- i Sony RX100 II
Sony NEX-F3« »-74/1004.5/54.5/54.5/5 May 2012 599- i Sony NEX-F3
Sony RX100« »HiRec78/1004/55/55/5 Jun 2012 649- i Sony RX100
Sony NEX-3« »-70/1004.5/55/54/5 May 2010 599- i Sony NEX-3

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. 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. 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 are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you do not see the camera that you are looking for, kindly get in touch, and I will try to locate and add the respective data to the application.

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