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Fujifilm X-A1 vs Pentax 645Z

The Fujifilm X-A1 and the Pentax 645Z are two digital cameras that were revealed to the public, respectively, in September 2013 and April 2014. The X-A1 is a mirrorless interchangeable lens camera, while the 645Z is a DSLR. The cameras are based on an APS-C (X-A1) and a medium format (645Z) sensor. The Fujifilm has a resolution of 16 megapixels, whereas the Pentax provides 51.1 MP.

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

Headline Specifications
Fujifilm X-A1   Pentax 645Z
Fujifilm X-A1 Pentax 645Z
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax 645 mount lenses
16 MP, APS-C Sensor 51.1 MP, Medium Format Sensor
1080/30p Video 1080/60i Video
ISO 200-6400 (100-25600) ISO 100-204800
No viewfinder, LCD framing Optical viewfinder
3.0" LCD, 920k dots 3.2" LCD, 1037k dots
Tilting screen (no touchscreen) Tilting screen (not touch-sensitive)
5.6 shutter flaps per second 3 shutter flaps per second
Not weather sealedWeathersealed body
350 shots per battery charge650 shots per battery charge
117 x 67 x 39 mm, 330 g 156 x 117 x 123 mm, 1550 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-A1 and the Pentax 645Z? 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

An illustration of the physical size and weight of the Fujifilm X-A1 and the Pentax 645Z is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The X-A1 can be obtained in two different colors (black, blue), while the 645Z is only available in black.

Size Fujifilm X-A1 vs Pentax 645Z
Compare X-A1 versus 645Z top
Comparison X-A1 or 645Z rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645Z is considerably larger (133 percent) than the Fujifilm X-A1. Moreover, the 645Z is substantially heavier (370 percent) than the X-A1. It is noteworthy in this context that the 645Z is splash and dust-proof, while the X-A1 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-A1 gets 350 shots out of its NP-W126 battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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
 
Fujifilm X-A1» 4.6 in 2.6 in 1.5 in 11.6 oz 350 n Sep 2013 399- i Fujifilm X-A1
 
Pentax 645Z« 6.1 in 4.6 in 4.8 in 54.7 oz 650 Y Apr 2014 8,499 i i Pentax 645Z
 
Canon 5DS« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 i i Canon 5DS
 
Canon 5DS R« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 i i Canon 5DS R
 
Fujifilm X-A5« » 4.6 in 2.7 in 1.6 in 12.7 oz 450 n Jan 2018 399- i Fujifilm X-A5
 
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-A10« » 4.6 in 2.6 in 1.6 in 11.7 oz 410 n Dec 2016 399- i Fujifilm X-A10
 
Fujifilm X-E2S« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Jan 2016 699- i Fujifilm X-E2S
 
Fujifilm X-A2« » 4.6 in 2.6 in 1.6 in 12.3 oz 410 n Jan 2015 399- i Fujifilm X-A2
 
Fujifilm X-T10« » 4.6 in 3.3 in 1.6 in 13.4 oz 350 n May 2015 799- i Fujifilm X-T10
 
Fujifilm X-E2« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Oct 2013 999- i Fujifilm X-E2
 
Fujifilm X-M1« » 4.6 in 2.6 in 1.5 in 11.6 oz 350 n Jun 2013 699- i Fujifilm X-M1
 
Fujifilm X-E1« » 5.1 in 3.0 in 1.5 in 12.3 oz 350 n Sep 2012 999- i Fujifilm X-E1
 
Fujifilm X-Pro1« » 5.5 in 3.2 in 1.7 in 15.9 oz 300 n Jan 2012 1,699- i Fujifilm X-Pro1
 
Hasselblad X1D« » 5.9 in 3.9 in 2.8 in 25.6 oz .. Y Jun 2016 8,995- i Hasselblad X1D
 
Leica SL« » 5.8 in 4.1 in 1.5 in 29.9 oz 400 Y Oct 2015 7,450 i i Leica SL
 
Pentax 645D« » 6.1 in 4.6 in 4.7 in 52.2 oz 800 Y Mar 2010 9,995- i Pentax 645D
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The X-A1 was launched at a markedly lower price (by 95 percent) than the 645Z, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.

 

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Fujifilm X-A1 features an APS-C sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 289 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 0.79. The sensor in the X-A1 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Fujifilm X-A1 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the X-A1 (16MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 4.80μm for the X-A1) due to its larger sensor. Moreover, the 645Z is a somewhat more recent model (by 6 months) than the X-A1, and its sensor might 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 the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax 645Z implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645Z for good quality output (200 dots per inch) amounts to 41.3 x 31 inch or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inch or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inch or 69.9 x 52.4 cm. The corresponding values for the Fujifilm X-A1 are 24.5 x 16.3 inch or 62.2 x 41.5 cm for good quality, 19.6 x 13.1 inch or 49.7 x 33.2 cm for very good quality, and 16.3 x 10.9 inch or 41.5 x 27.6 cm for excellent quality prints.

The Fujifilm X-A1 has a native sensitivity range from ISO 200 to ISO 6400, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).

X-A1 versus 645Z MP

For many 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 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
 
Fujifilm X-A1» APS-C 16.0 4896 32641080/30p----Fujifilm X-A1
 
Pentax 645Z« Medium Format 51.1 8256 61921080/60i26.014.74505101Pentax 645Z
 
Canon 5DS« » Full Frame 50.3 8688 57921080/30p24.712.4238187Canon 5DS
 
Canon 5DS R« » Full Frame 50.3 8688 57921080/30p24.612.4230886Canon 5DS R
 
Fujifilm X-A5« » APS-C 24.0 6000 40004K/15p----Fujifilm X-A5
 
Fujifilm X-A3« » APS-C 24.0 6000 40001080/60p----Fujifilm X-A3
 
Fujifilm X-A10« » APS-C 16.0 4896 32641080/30p----Fujifilm X-A10
 
Fujifilm X-E2S« » APS-C 16.0 4896 32641080/60p----Fujifilm X-E2S
 
Fujifilm X-A2« » APS-C 16.0 4896 32641080/30p----Fujifilm X-A2
 
Fujifilm X-T10« » APS-C 16.0 4896 32641080/60p----Fujifilm X-T10
 
Fujifilm X-E2« » APS-C 16.0 4896 32641080/60p----Fujifilm X-E2
 
Fujifilm X-M1« » APS-C 16.0 4896 32641080/30p----Fujifilm X-M1
 
Fujifilm X-E1« » APS-C 16.0 4896 32641080/24p----Fujifilm X-E1
 
Fujifilm X-Pro1« » APS-C 16.0 4896 32641080/24p----Fujifilm X-Pro1
 
Hasselblad X1D« » Medium Format 51.3 8272 62001080/25p26.214.84489102Hasselblad X1D
 
Leica SL« » Full Frame 24.0 6000 40004K/30p25.013.4182188Leica SL
 
Pentax 645D« » Medium Format 39.5 7264 5440-24.612.6126282Pentax 645D

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 645Z provides a faster frame rate than the X-A1. It can shoot movie footage at 1080/60i, while the Fujifilm is limited to 1080/30p.

 

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the 645Z has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the X-A1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Fujifilm X-A1 and Pentax 645Z along with similar information for a selection of comparators.

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
Camera
Model
 
Fujifilm X-A1»- n 3.0 920 tilting n 1/4000s 5.6 Y n Fujifilm X-A1
 
Pentax 645Z«optical Y 3.2 1037 tilting n 1/4000s 3.0 n n Pentax 645Z
 
Canon 5DS« »optical Y 3.2 1040 fixed n 1/8000s 5.0 n n Canon 5DS
 
Canon 5DS R« »optical Y 3.2 1040 fixed n 1/8000s 5.0 n n Canon 5DS R
 
Fujifilm X-A5« »- n 3.0 1040 tilting Y 1/4000s 6.0 Y n Fujifilm X-A5
 
Fujifilm X-A3« »- n 3.0 1040 tilting Y 1/4000s 6.0 Y n Fujifilm X-A3
 
Fujifilm X-A10« »- n 3.0 1040 tilting n 1/4000s 6.0 Y n Fujifilm X-A10
 
Fujifilm X-E2S« »2360 n 3.0 1040 fixed n 1/4000s 7.0 Y n Fujifilm X-E2S
 
Fujifilm X-A2« »- n 3.0 920 tilting n 1/4000s 5.6 Y n Fujifilm X-A2
 
Fujifilm X-T10« »2360 n 3.0 920 tilting n 1/4000s 8.0 Y n Fujifilm X-T10
 
Fujifilm X-E2« »2360 n 3.0 1040 fixed n 1/4000s 7.0 Y n Fujifilm X-E2
 
Fujifilm X-M1« »- n 3.0 920 tilting n 1/4000s 5.6 Y n Fujifilm X-M1
 
Fujifilm X-E1« »2360 n 2.8 460 fixed n 1/4000s 6.0 Y n Fujifilm X-E1
 
Fujifilm X-Pro1« »1440 n 3.0 1230 fixed n 1/4000s 6.0 n n Fujifilm X-Pro1
 
Hasselblad X1D« »2360 n 3.0 920 fixed Y 1/2000s 2.3 n n Hasselblad X1D
 
Leica SL« »4400 Y 3.0 1040 fixed Y 1/8000s 11.0 n n Leica SL
 
Pentax 645D« »optical Y 3.0 921 fixed n 1/4000s 1.1 n n Pentax 645D

One difference between the cameras concerns the presence of an on-board flash. The X-A1 has one, while the 645Z does not. While the built-in flash of the X-A1 is not very powerful, it can at times be useful as a fill-in light.

The X-A1 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 645Z does not have a selfie-screen.

The Pentax 645Z has 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.

The X-A1 writes its imaging data to SDHC cards, while the 645Z uses SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-A1 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-A1 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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
 
Fujifilm X-A1»Ystereomono--mini2.0Y--Fujifilm X-A1
 
Pentax 645Z«YstereomonoY-mini3.0---Pentax 645Z
 
Canon 5DS« »YmonomonoY-mini3.0---Canon 5DS
 
Canon 5DS R« »YmonomonoY-mini3.0---Canon 5DS R
 
Fujifilm X-A5« »YstereomonoY-mini2.0Y-YFujifilm X-A5
 
Fujifilm X-A3« »Ystereomono--micro2.0Y--Fujifilm X-A3
 
Fujifilm X-A10« »-stereomono--mini2.0Y--Fujifilm X-A10
 
Fujifilm X-E2S« »YstereomonoY-micro2.0Y--Fujifilm X-E2S
 
Fujifilm X-A2« »Ystereomono--mini2.0Y--Fujifilm X-A2
 
Fujifilm X-T10« »YstereomonoY-micro2.0Y--Fujifilm X-T10
 
Fujifilm X-E2« »YstereomonoY-micro2.0Y--Fujifilm X-E2
 
Fujifilm X-M1« »Ystereomono--mini2.0Y--Fujifilm X-M1
 
Fujifilm X-E1« »YstereomonoY-mini2.0---Fujifilm X-E1
 
Fujifilm X-Pro1« »Ystereomono--mini2.0---Fujifilm X-Pro1
 
Hasselblad X1D« »YstereomonoYYmini3.0Y--Hasselblad X1D
 
Leica SL« »YstereomonoYYfull3.0Y--Leica SL
 
Pentax 645D« »Ystereo----2.0---Pentax 645D

It is notable that the X-A1 offers wifi support, while the 645Z does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Studio photographers will appreciate that the Pentax 645Z (unlike the X-A1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The 645Z is a recent model that features in the current product line-up of Pentax. In contrast, the X-A1 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the X-A1 was succeeded by the Fujifilm X-A2. 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 what is the bottom line? Is the Fujifilm X-A1 better than the Pentax 645Z or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Fujifilm X-A1:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (5.6 vs 3 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (117x67mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 1220g or 79 percent) and hence easier to carry around.
  • 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 file upload: Has wifi built in for automatic backup or image transfer to the web.
  • More affordable: Was introduced into a lower priced category (95 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in September 2013).

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Advantages of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 16MP), which boosts linear resolution by 75%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
  • Better sound: Can connect to an external microphone for higher quality sound 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 detailed LCD: Has a higher resolution rear screen (1037k vs 920k dots).
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (650 versus 350) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • 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.
  • More modern: Was introduced somewhat (6 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the 645Z is the clear winner of the contest (19 : 10 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. 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-A1 10:19 645Z

How about other alternatives? Do the specifications of the Fujifilm X-A1 and the Pentax 645Z 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-A1 or the 645Z 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 (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Fujifilm X-A1»--4.5/5-4.5/5 Sep 2013 399- i Fujifilm X-A1
 
Pentax 645Z«--4.5/55/55/5 Apr 2014 8,499 i i Pentax 645Z
 
Canon 5DS« »+83/1004.5/55/54.5/5 Feb 2015 3,699 i i Canon 5DS
 
Canon 5DS R« »+83/1005/55/54.5/5 Feb 2015 3,699 i i Canon 5DS R
 
Fujifilm X-A5« »+-4/54/53.5/5 Jan 2018 399- i Fujifilm X-A5
 
Fujifilm X-A3« »-74/1004.5/5-4/5 Aug 2016 399- i Fujifilm X-A3
 
Fujifilm X-A10« »--4/5-4/5 Dec 2016 399- i Fujifilm X-A10
 
Fujifilm X-E2S« »-77/1004.5/5-4.5/5 Jan 2016 699- i Fujifilm X-E2S
 
Fujifilm X-A2« »--4.5/54/54.5/5 Jan 2015 399- i Fujifilm X-A2
 
Fujifilm X-T10« »+ +80/1005/54/55/5 May 2015 799- i Fujifilm X-T10
 
Fujifilm X-E2« »-80/1004.5/5-5/5 Oct 2013 999- i Fujifilm X-E2
 
Fujifilm X-M1« »+77/1004.5/5-4.5/5 Jun 2013 699- i Fujifilm X-M1
 
Fujifilm X-E1« »+ +79/1004.5/54.5/54.5/5 Sep 2012 999- i Fujifilm X-E1
 
Fujifilm X-Pro1« »+ +79/1004.5/54/54.5/5 Jan 2012 1,699- i Fujifilm X-Pro1
 
Hasselblad X1D« »o81/100--4/5 Jun 2016 8,995- i Hasselblad X1D
 
Leica SL« »-84/1004.5/54/54/5 Oct 2015 7,450 i i Leica SL
 
Pentax 645D« »---4.5/5- Mar 2010 9,995- i Pentax 645D
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. 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-A1:
Check Ebay offers
Pentax 645Z:
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 your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Fujifilm X-A1 vs Pentax 645Z

    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-A1 Pentax 645Z
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax 645 mount lenses
    Launch Date September 2013 April 2014
    Launch Price USD 399 USD 8499
    Sensor Specs Fujifilm X-A1 Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 23.5 x 15.7 mm 43.8 x 32.8 mm
    Sensor Area 368.95 mm2 1436.64 mm2
    Sensor Diagonal 28.3 mm 54.7 mm
    Crop Factor 1.5x 0.79x
    Sensor Resolution 16 Megapixels 51.1 Megapixels
    Image Resolution 4896 x 3264 pixels 8256 x 6192 pixels
    Pixel Pitch 4.80 μm 5.30 μm
    Pixel Density 4.33 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/30p Video 1080/60i Video
    ISO Setting 200-6400 ISO 100-204800 ISO
    ISO Boost 100-25600 ISO no Enhancement
    Image Processor EXR Processor II PRIME III
    DXO Sensor Quality (score) .. 101
    DXO Color Depth (bits) .. 26.0
    DXO Dynamic Range (EV) .. 14.7
    DXO Low Light (ISO) .. 4505
    Screen Specs Fujifilm X-A1 Pentax 645Z
    Viewfinder Type No viewfinder Optical viewfinder
    Viewfinder Field of View 98%
    Viewfinder Magnification 0.78x
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.2 inch
    LCD Resolution 920k dots 1037k dots
    LCD Attachment Tilting screen Tilting screen
    Shooting Specs Fujifilm X-A1 Pentax 645Z
    Autofocus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000/s 1/4000/s
    Continuous Shooting 5.6 shutter flaps/s 3 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDHC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Fujifilm X-A1 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 3.0
    HDMI Port mini HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm X-A1 Pentax 645Z
    Environmental SealingNot weather sealedWeathersealed body
    Battery Type NP-W126 D-LI90
    Battery Life (CIPA)350 shots per charge650 shots per charge
    Body Dimensions 117 x 67 x 39 mm
    (4.6 x 2.6 x 1.5 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 330 g (11.6 oz) 1550 g (54.7 oz)

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