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Pentax K-3 versus Fujifilm X-T20

The Pentax K-3 and the Fujifilm X-T20 are two digital cameras that were revealed to the public, respectively, in October 2013 and January 2017. The K-3 is a DSLR, while the X-T20 is a mirrorless interchangeable lens camera. Both cameras are equipped with an APS-C sensor. The Pentax has a resolution of 24.1 megapixel, whereas the Fujifilm provides 24 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: Pentax K-3 vs Fujifilm X-T20

An illustration of the physical size and weight of the Pentax K-3 and the Fujifilm X-T20 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 size 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 side – the K-3 – represents the basis for the calculations across all the size and weight measures).

Compare Pentax K-3 vs Fujifilm X-T20
Compare K-3 versus X-T20 top
Compare K-3 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 smaller (25 percent) than the Pentax K-3. Moreover, the X-T20 is substantially lighter (52 percent) than the K-3. It is worth mentioning in this context that the K-3 is splash and dust resistant, while the X-T20 does not feature any corresponding weather-sealing.

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. Hence, you might want to study the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the K-3 gets 560 shots out of its D-LI90 battery, while the X-T20 can take 350 images on a single charge of its NP-W126S 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
Pentax K-3» 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299- i Pentax K-3
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
Canon 70D« » 5.5 in 4.1 in 3.1 in 26.6 oz 920 Y Jul 2013 1,199- i Canon 70D
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 X70« » 4.4 in 2.5 in 1.7 in 12.0 oz 330 n Jan 2016 799- i Fujifilm X70
Fujifilm X-A3« » 4.6 in 2.6 in 1.6 in 12.0 oz 410 n Aug 2016 399- 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
Nikon D7200« » 5.4 in 4.2 in 3.0 in 27.0 oz 1110 Y Mar 2015 1,199- i Nikon D7200
Nikon D7100« » 5.4 in 4.2 in 3.0 in 27.0 oz 950 Y Feb 2013 1,199- i Nikon D7100
Pentax KP« » 5.2 in 4.0 in 3.0 in 24.8 oz 390 Y Jan 2017 1,099 i i Pentax KP
Pentax K-70« » 5.0 in 3.7 in 2.9 in 24.3 oz 410 Y Jun 2016 649 i i Pentax K-70
Pentax K-3 II« » 5.2 in 3.9 in 3.0 in 28.2 oz 720 Y Apr 2015 1,099 i i Pentax K-3 II
Pentax K-5« » 5.2 in 3.8 in 2.9 in 26.8 oz 740 Y Sep 2010 1,099- i Pentax K-5
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399 i i Sony A6500
Sony RX10« » 5.1 in 3.5 in 4.0 in 28.7 oz 420 Y Oct 2013 1,299- i Sony RX10
Sony A99« » 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799- i Sony A99

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. The X-T20 was launched at a markedly lower price (by 31 percent) than the K-3, 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: Pentax K-3 vs Fujifilm X-T20

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 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.

Pentax K-3 and Fujifilm X-T20 sensor measures

Despite having a slightly smaller sensor, the Pentax K-3 offers a higher resolution of 24.1 megapixel, compared with 24 MP of the Fujifilm X-T20. 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 3.90μm versus 3.92μm for the X-T20). Moreover, it should be noted that the X-T20 is much more recent (by 3 years and 3 months) than the K-3, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. 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.

The X-T20 has on-sensor phase detect pixels, which results in relatively fast and reliable autofocus acquisition during video recording.

K-3 versus X-T20 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Pentax K-3» APS-C 24.1 6016 40001080/60i23.713.4121680Pentax K-3
Fujifilm X-T20« APS-C 24.0 6000 40004K/30p----Fujifilm X-T20
Canon 70D« » APS-C 20.0 5472 36481080/30p22.511.692668Canon 70D
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 X70« » APS-C 16.0 4896 32641080/60p----Fujifilm X70
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
Nikon D7200« » APS-C 24.0 6000 40001080/60p24.514.6133387Nikon D7200
Nikon D7100« » APS-C 24.0 6000 40001080/60p24.213.7125683Nikon D7100
Pentax KP« » APS-C 24.1 6016 40001080/60i----Pentax KP
Pentax K-70« » APS-C 24.0 6000 40001080/60i----Pentax K-70
Pentax K-3 II« » APS-C 24.1 6016 40001080/60i23.613.6110680Pentax K-3 II
Pentax K-5« » APS-C 16.1 4928 32641080/25p23.714.1116282Pentax K-5
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585Sony A6500
Sony RX10« » 1-inch 20.0 5472 36481080/60p22.912.647469Sony RX10
Sony A99« » Full Frame 24.0 6000 40001080/60p25.014.0155589Sony A99

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 X-T20 provides a better video resolution than the K-3. It can shoot movie footage at 4K/30p, while the Pentax is limited to 1080/60i.

 

Feature comparison: Pentax K-3 vs Fujifilm X-T20

Beyond body and sensor, cameras can and do differ across a range of features. For example, the X-T20 has an electronic viewfinder (2360k dots), while the K-3 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Pentax K-3 and Fujifilm X-T20 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
Pentax K-3»optical Y 3.2 1037 fixed n 8000 8.3 Y Y Pentax K-3
Fujifilm X-T20«2360 n 3.0 1040 tilting Y 4000 8.0 Y n Fujifilm X-T20
Canon 70D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 70D
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 X70« »- n 3.0 1040 tilting Y 4000 8.0 Y n Fujifilm X70
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
Nikon D7200« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7200
Nikon D7100« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7100
Pentax KP« »optical n 3.0 921 tilting n 6000 7.0 Y Y Pentax KP
Pentax K-70« »optical n 3.0 921 swivel n 6000 6.0 Y Y Pentax K-70
Pentax K-3 II« »optical Y 3.2 1037 fixed n 8000 8.3 n Y Pentax K-3 II
Pentax K-5« »optical Y 3.0 921 fixed n 8000 7.0 Y Y Pentax K-5
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y Sony A6500
Sony RX10« »1440 Y 3.0 1229 tilting n 3200 10.0 Y Y Sony RX10
Sony A99« »2359 Y 3.0 1229 full-flex n 8000 6.0 n Y Sony A99

One feature that is present on the K-3, but is missing on the X-T20 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

Both the K-3 and the X-T20 write their imaging data to SDXC cards. The K-3 features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-T20 only has one slot.

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
Pentax K-3»YmonomonoYYmini3.0---Pentax K-3
Fujifilm X-T20«YstereomonoY-micro2.0Y--Fujifilm X-T20
Canon 70D« »YstereomonoY-mini2.0Y--Canon 70D
Fujifilm X-T100« »YstereomonoY-micro2.0Y-YFujifilm X-T100
Fujifilm X-E3« »YstereomonoY-micro2.0Y-YFujifilm X-E3
Fujifilm X70« »YstereomonoY-micro2.0Y--Fujifilm X70
Fujifilm X-A3« »Ystereomono--micro2.0Y--Fujifilm X-A3
Fujifilm X-T10« »YstereomonoY-micro2.0Y--Fujifilm X-T10
Nikon D7200« »YstereomonoYYmini2.0YY-Nikon D7200
Nikon D7100« »YstereomonoYYmini2.0---Nikon D7100
Pentax KP« »YstereomonoY--2.0Y--Pentax KP
Pentax K-70« »YstereomonoY-mini2.0Y--Pentax K-70
Pentax K-3 II« »YmonomonoYYmini3.0---Pentax K-3 II
Pentax K-5« »YstereomonoY-mini2.0---Pentax K-5
Sony A6500« »YstereomonoY-micro2.0YY-Sony A6500
Sony RX10« »YstereomonoYYmicro2.0YY-Sony RX10
Sony A99« »YstereomonoYYmini2.0---Sony A99

The X-T20 is a recent model that features in the current product line-up of Fujifilm. In contrast, the K-3 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the K-3 was succeeded by the Pentax K-3 II.

Review summary: Pentax K-3 vs Fujifilm X-T20

So how do things add up? Is there a clear favorite between the Pentax K-3 and the Fujifilm X-T20? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Pentax K-3:

  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Longer lasting: Can take more shots (560 versus 350) 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.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been available for much longer (launched in October 2013).

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Reasons to prefer the Fujifilm X-T20:

  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better video autofocus: Features on-sensor phase-detection for more confident movie autofocus.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More compact: Is smaller (118x83mm vs 131x100mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 417g or 52 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • More affordable: Was introduced into a lower priced category (31 percent cheaper at launch).
  • More modern: Reflects 3 years and 3 months of technical progress since the K-3 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (11 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.

K-3 11:11 X-T20

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 K-3 and the X-T20 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 where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major 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
Pentax K-3»-83/1005/54.5/55/5 Oct 2013 1,299- i Pentax K-3
Fujifilm X-T20«HiRec82/1005/5-4.5/5 Jan 2017 899 i i Fujifilm X-T20
Canon 70D« »HiRec83/1004.5/54.5/55/5 Jul 2013 1,199- i Canon 70D
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 X70« »-76/1004.5/54/54.5/5 Jan 2016 799- i Fujifilm X70
Fujifilm X-A3« »-74/1004.5/5-4/5 Aug 2016 399- i Fujifilm X-A3
Fujifilm X-T10« »HiRec80/1005/54/55/5 May 2015 799- i Fujifilm X-T10
Nikon D7200« »HiRec84/1004.5/54/54.5/5 Mar 2015 1,199- i Nikon D7200
Nikon D7100« »HiRec85/1004.5/55/54.5/5 Feb 2013 1,199- i Nikon D7100
Pentax KP« »-82/1005/5-4.5/5 Jan 2017 1,099 i i Pentax KP
Pentax K-70« »-79/1004.5/54/54.5/5 Jun 2016 649 i i Pentax K-70
Pentax K-3 II« »--5/54.5/55/5 Apr 2015 1,099 i i Pentax K-3 II
Pentax K-5« »-83/1005/54.5/54.5/5 Sep 2010 1,099- i Pentax K-5
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i Sony A6500
Sony RX10« »Rec80/1004.5/54.5/54.5/5 Oct 2013 1,299- i Sony RX10
Sony A99« »-84/1004.5/5rev4.5/5 Sep 2012 2,799- i Sony A99

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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, please contact me, and I will try to add information on that model to the database.

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