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Fujifilm X-A5 vs Pentax K-1 II

The Fujifilm X-A5 and the Pentax K-1 II are two digital cameras that were officially introduced, respectively, in January 2018 and February 2018. The X-A5 is a mirrorless interchangeable lens camera, while the K-1 II is a DSLR. The cameras are based on an APS-C (X-A5) and a full frame (K-1 II) sensor. The Fujifilm has a resolution of 24 megapixels, whereas the Pentax provides 36.2 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Fujifilm X-A5
versus
Pentax K-1 II
Fujifilm X-A5   Pentax K-1 II
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax K mount lenses
24 MP, APS-C Sensor 36.2 MP, Full Frame Sensor
4K/15p Video 1080/60i Video
ISO 200-12,800 (200 - 51,200) ISO 100-819,200
No viewfinder, LCD framing Optical viewfinder
3.0 LCD, 1040k dots 3.2 LCD, 1037k dots
Tilting touchscreen Fully flexible screen (no touchscreen)
6 shutter flaps per second 4.4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
450 shots per battery charge670 shots per battery charge
117 x 68 x 40 mm, 361 g 137 x 110 x 86 mm, 1010 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-A5 and the Pentax K-1 II? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

The physical size and weight of the Fujifilm X-A5 and the Pentax K-1 II are illustrated 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.

The X-A5 can be obtained in three different colors (silver, brown, pink), while the K-1 II is available in two color-versions (black, silver).

Size Fujifilm X-A5 vs Pentax K-1 II
Compare X-A5 versus K-1 II top
Comparison X-A5 or K-1 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-1 II is considerably larger (89 percent) than the Fujifilm X-A5. Moreover, the K-1 II is substantially heavier (180 percent) than the X-A5. It is noteworthy in this context that the K-1 II is splash and dust-proof, while the X-A5 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 and compare 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 X-A5 gets 450 shots out of its NP-W126S battery, while the K-1 II can take 670 images on a single charge of its D-LI90 power pack. The power pack in the X-A5 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-A5 117 mm 68 mm 40 mm 361 g 450 n Jan 2018 399 i
2.
 
Pentax K-1 II 137 mm 110 mm 86 mm 1010 g 670 Y Feb 2018 1,999 i
3.
 
Fujifilm X-T200 121 mm 84 mm 55 mm 370 g 270 n Jan 2020 699 i
4.
 
Fujifilm X-T30 118 mm 83 mm 47 mm 383 g 380 n Feb 2019 899 i
5.
 
Fujifilm X-A7 119 mm 68 mm 41 mm 320 g 440 n Sep 2019 499 i
6.
 
Fujifilm X-T100 121 mm 83 mm 47 mm 448 g 430 n May 2018 599 i
7.
 
Fujifilm X-E3 121 mm 74 mm 43 mm 337 g 350 n Sep 2017 899 i
8.
 
Fujifilm X-T20 118 mm 83 mm 41 mm 383 g 350 n Jan 2017 899 i
9.
 
Fujifilm X-A3 117 mm 67 mm 40 mm 339 g 410 n Aug 2016 399 i
10.
 
Fujifilm X-A10 117 mm 67 mm 40 mm 331 g 410 n Dec 2016 399 i
11.
 
Fujifilm X-A2 117 mm 67 mm 40 mm 350 g 410 n Jan 2015 399 i
12.
 
Nikon D3500 124 mm 97 mm 70 mm 365 g 1550 n Aug 2018 429 i
13.
 
Panasonic S1R 149 mm 110 mm 97 mm 1016 g 380 Y Feb 2019 3,699 i
14.
 
Pentax K-1 137 mm 110 mm 86 mm 1010 g 760 Y Feb 2016 1,799 i
15.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199 i
16.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i
17.
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 1,999 i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision 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 X-A5 was launched at a markedly lower price (by 80 percent) than the K-1 II, 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

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Fujifilm X-A5 features an APS-C sensor and the Pentax K-1 II a full frame sensor. The sensor area in the K-1 II is 134 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Fujifilm X-A5 and Pentax K-1 II sensor measures

With 36.2MP, the K-1 II offers a higher resolution than the X-A5 (24MP), but the K-1 II nevertheless has larger individual pixels (pixel pitch of 4.88μm versus 3.92μm for the X-A5) due to its larger sensor. It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. Coming back to sensor resolution, it should be mentioned that the K-1 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax K-1 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-1 II for good quality output (200 dots per inch) amounts to 36.8 x 24.6 inches or 93.5 x 62.4 cm, for very good quality (250 dpi) 29.4 x 19.6 inches or 74.8 x 49.9 cm, and for excellent quality (300 dpi) 24.5 x 16.4 inches or 62.3 x 41.6 cm. The corresponding values for the Fujifilm X-A5 are 30 x 20 inches or 76.2 x 50.8 cm for good quality, 24 x 16 inches or 61 x 40.6 cm for very good quality, and 20 x 13.3 inches or 50.8 x 33.9 cm for excellent quality prints.

Unlike the X-A5, the K-1 II 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).

The Fujifilm X-A5 has a native sensitivity range from ISO 200 to ISO 12800, which can be extended to ISO 200-51200. The corresponding ISO settings for the Pentax K-1 II are ISO 100 to ISO 819200 (no boost).

X-A5 versus K-1 II 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Fujifilm X-A5 APS-C 24.0 6000 40004K/15p...... ..
2.
 
Pentax K-1 II Full Frame 36.2 7360 49121080/60i...... ..
3.
 
Fujifilm X-T200 APS-C 24.0 6000 40004K/30p...... ..
4.
 
Fujifilm X-T30 APS-C 26.0 6240 41604K/30p...... ..
5.
 
Fujifilm X-A7 APS-C 24.0 6000 40004K/30p...... ..
6.
 
Fujifilm X-T100 APS-C 24.0 6000 40004K/15p...... ..
7.
 
Fujifilm X-E3 APS-C 24.0 6000 40004K/30p...... ..
8.
 
Fujifilm X-T20 APS-C 24.0 6000 40004K/30p...... ..
9.
 
Fujifilm X-A3 APS-C 24.0 6000 40001080/60p...... ..
10.
 
Fujifilm X-A10 APS-C 16.0 4896 32641080/30p...... ..
11.
 
Fujifilm X-A2 APS-C 16.0 4896 32641080/30p...... ..
12.
 
Nikon D3500 APS-C 24.0 6000 40001080/60p...... ..
13.
 
Panasonic S1R Full Frame 46.7 8368 55844K/60p26.414.13525 100
14.
 
Pentax K-1 Full Frame 36.2 7360 49121080/60i25.414.63280 96
15.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523 100
16.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.42317 92
17.
 
Sony A850 Full Frame 24.4 6048 4032none23.812.21415 79

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the X-A5 provides a higher video resolution than the K-1 II. It can shoot video footage at 4K/15p, while the Pentax is limited to 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the K-1 II has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the X-A5 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Fujifilm X-A5 and Pentax K-1 II in connection with corresponding information for a sample of similar cameras.

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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)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Fujifilm X-A5none n 3.0 1040 tilting Y 1/4000s 6.0 Y n
2.
 
Pentax K-1 IIoptical Y 3.2 1037 full-flex n 1/8000s 4.4 n Y
3.
 
Fujifilm X-T2002360 n 3.5 2780 swivel Y 1/4000s 8.0 Y n
4.
 
Fujifilm X-T302360 n 3.0 1040 tilting Y 1/4000s 8.0 Y n
5.
 
Fujifilm X-A7none n 3.5 2760 swivel Y 1/4000s 6.0 Y n
6.
 
Fujifilm X-T1002360 n 3.0 1040 full-flex Y 1/4000s 6.0 Y n
7.
 
Fujifilm X-E32360 n 3.0 1040 fixed Y 1/4000s 8.0 n n
8.
 
Fujifilm X-T202360 n 3.0 1040 tilting Y 1/4000s 8.0 Y n
9.
 
Fujifilm X-A3none n 3.0 1040 tilting Y 1/4000s 6.0 Y n
10.
 
Fujifilm X-A10none n 3.0 1040 tilting n 1/4000s 6.0 Y n
11.
 
Fujifilm X-A2none n 3.0 920 tilting n 1/4000s 5.6 Y n
12.
 
Nikon D3500optical n 3.0 921 fixed n 1/4000s 5.0 Y n
13.
 
Panasonic S1R5760 Y 3.2 2100 full-flex Y 1/8000s 9.0 n Y
14.
 
Pentax K-1optical Y 3.2 1037 full-flex n 1/8000s 4.4 n Y
15.
 
Sony A7R III3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
16.
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
17.
 
Sony A850optical Y 3.0 922 fixed n 1/8000s 3.0 n Y

One difference between the cameras concerns the presence of an on-board flash. The X-A5 has one, while the K-1 II does not. While the built-in flash of the X-A5 is not very powerful, it can at times be useful as a fill-in light.

The X-A5 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the K-1 II does not have a selfie-screen.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the X-A5 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Fujifilm X-A5 and the Pentax K-1 II both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the X-A5 and the K-1 II write their files to SDXC cards. The K-1 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-A5 only has one slot. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Fujifilm X-A5 and Pentax K-1 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Fujifilm X-A5YstereomonoY-mini2.0Y-Y
2.
 
Pentax K-1 IIYstereomonoYYmicro2.0Y--
3.
 
Fujifilm X-T200YstereomonoYYmicro3.1Y-Y
4.
 
Fujifilm X-T30YstereomonoY-micro3.1Y-Y
5.
 
Fujifilm X-A7YstereomonoY-mini2.0Y-Y
6.
 
Fujifilm X-T100YstereomonoY-micro2.0Y-Y
7.
 
Fujifilm X-E3YstereomonoY-micro2.0Y-Y
8.
 
Fujifilm X-T20YstereomonoY-micro2.0Y--
9.
 
Fujifilm X-A3Ystereomono--micro2.0Y--
10.
 
Fujifilm X-A10-stereomono--mini2.0Y--
11.
 
Fujifilm X-A2Ystereomono--mini2.0Y--
12.
 
Nikon D3500Ymonomono--mini2.0--Y
13.
 
Panasonic S1RYstereomonoYYfull3.1Y-Y
14.
 
Pentax K-1YstereomonoYYmicro2.0Y--
15.
 
Sony A7R IIIYstereomonoYYmicro3.1YYY
16.
 
Sony A99 IIYstereomonoYYmicro2.0YYY
17.
 
Sony A850Y----mini2.0---

It is notable that the K-1 II has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The X-A5 lacks such a headphone port.

Studio photographers will appreciate that the Pentax K-1 II (unlike the X-A5) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the K-1 II has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The K-1 II is a recent model that features in the current product line-up of Pentax. In contrast, the X-A5 has been discontinued (but can be found pre-owned on eBay). There has not been a direct replacement model for the X-A5 from Fujifilm. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Fujifilm and Pentax websites.

Review summary

So how do things add up? Is there a clear favorite between the Fujifilm X-A5 and the Pentax K-1 II? Which camera is better? The listing below highlights the relative strengths of the two models.

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Advantages of the Fujifilm X-A5:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher definition movie capture (4K/15p vs 1080/60i).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (6 vs 4.4 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (117x68mm vs 137x110mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 649g or 64 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More affordable: Was introduced into a lower priced category (80 percent cheaper at launch).

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Reasons to prefer the Pentax K-1 II:

  • More detail: Has more megapixels (36.2 vs 24MP), which boosts linear resolution by 23%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
  • Richer colors: The pixel size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Longer lasting: Gets more shots (670 versus 450) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.

If the count of individual advantages (bullet points above) is taken as a guide, the K-1 II is the clear winner of the contest (19 : 13 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. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

X-A5 13:19 K-1 II

How about other alternatives? Do the specifications of the Fujifilm X-A5 and the Pentax K-1 II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the X-A5 or the K-1 II 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.

Expert reviews

This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-A5..+..4/53.5/5 Jan 2018 399 i
2.
 
Pentax K-1 II....79/1004.5/54.5/5 Feb 2018 1,999 i
3.
 
Fujifilm X-T2003.5/5..82/1004/54.5/5 Jan 2020 699 i
4.
 
Fujifilm X-T305/5+ +84/1004.5/54.5/5 Feb 2019 899 i
5.
 
Fujifilm X-A73/5..81/1004/53.5/5 Sep 2019 499 i
6.
 
Fujifilm X-T1004/5+79/1004/54.5/5 May 2018 599 i
7.
 
Fujifilm X-E34.5/5+84/1004.5/54.5/5 Sep 2017 899 i
8.
 
Fujifilm X-T205/5+ +82/1005/54.5/5 Jan 2017 899 i
9.
 
Fujifilm X-A3....74/1004.5/54/5 Aug 2016 399 i
10.
 
Fujifilm X-A10......4/54/5 Dec 2016 399 i
11.
 
Fujifilm X-A24/5....4.5/54.5/5 Jan 2015 399 i
12.
 
Nikon D3500....75/1004/54.5/5 Aug 2018 429 i
13.
 
Panasonic S1R4.5/5..89/1004.5/54.5/5 Feb 2019 3,699 i
14.
 
Pentax K-15/5..84/1005/55/5 Feb 2016 1,799 i
15.
 
Sony A7R III..+ +90/1004.5/55/5 Oct 2017 3,199 i
16.
 
Sony A99 II....85/1004.5/54.5/5 Sep 2016 3,199 i
17.
 
Sony A8503/5..75/100..4.5/5 Aug 2009 1,999 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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.

Fujifilm X-A5:
Check Ebay offers
Pentax K-1 II:
Check Amazon price

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.

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    Specifications: Fujifilm X-A5 vs Pentax K-1 II

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Fujifilm X-A5 Pentax K-1 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax K mount lenses
    Launch Date January 2018 February 2018
    Launch Price USD 399 USD 1,999
    Sensor Specs Fujifilm X-A5 Pentax K-1 II
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.5 x 15.7 mm 35.9 x 24.0 mm
    Sensor Area 368.95 mm2 861.6 mm2
    Sensor Diagonal 28.3 mm 43.2 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 24 Megapixels 36.2 Megapixels
    Image Resolution 6000 x 4000 pixels 7360 x 4912 pixels
    Pixel Pitch 3.92 μm 4.88 μm
    Pixel Density 6.50 MP/cm2 4.20 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 4K/15p Video 1080/60i Video
    ISO Setting 200 - 12,800 ISO 100 - 819,200 ISO
    ISO Boost 200 - 51,200 ISO no Enhancement
    Screen Specs Fujifilm X-A5 Pentax K-1 II
    Viewfinder Type no viewfinder Optical viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.70x
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 1040k dots 1037k dots
    LCD Attachment Tilting screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Fujifilm X-A5 Pentax K-1 II
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 6 shutter flaps/s 4.4 shutter flaps/s
    Electronic Shutterup to 1/32000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Fujifilm X-A5 Pentax K-1 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Bluetooth Support Bluetooth built-in no Bluetooth
    Geotagging no internal GPS GPS built-in
    Body Specs Fujifilm X-A5 Pentax K-1 II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type NP-W126S D-LI90
    Battery Life (CIPA)450 shots per charge670 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 117 x 68 x 40 mm
    (4.6 x 2.7 x 1.6 in)
    137 x 110 x 86 mm
    (5.4 x 4.3 x 3.4 in)
    Camera Weight 361 g (12.7 oz) 1010 g (35.6 oz)

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