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Fujifilm X-A3 vs Pentax 645Z

The Fujifilm X-A3 and the Pentax 645Z are two digital cameras that were announced, respectively, in August 2016 and April 2014. The X-A3 is a mirrorless interchangeable lens camera, while the 645Z is a DSLR. The cameras are based on an APS-C (X-A3) and a medium format (645Z) sensor. The Fujifilm has a resolution of 24 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-A3
versus
Pentax 645Z
Fujifilm X-A3   Pentax 645Z
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax 645 mount lenses
24 MP, APS-C Sensor 51.1 MP, Medium Format Sensor
1080/60p Video 1080/60i Video
ISO 200-6,400 (100 - 25,600) ISO 100-204,800
No viewfinder, LCD framing Optical viewfinder
3.0 LCD, 1040k dots 3.2 LCD, 1037k dots
Tilting touchscreen Tilting screen (not touch-sensitive)
6 shutter flaps per second 3 shutter flaps per second
not weather sealedWeathersealed body
410 shots per battery charge650 shots per battery charge
117 x 67 x 40 mm, 339 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-A3 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-A3 and the Pentax 645Z 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 width, height and depth dimensions are rounded to the nearest millimeter.

The X-A3 can be obtained in three different colors (silver, brown, pink), while the 645Z is only available in black.

Size Fujifilm X-A3 vs Pentax 645Z
Compare X-A3 versus 645Z top
Comparison X-A3 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-A3. Moreover, the 645Z is substantially heavier (357 percent) than the X-A3. It is noteworthy in this context that the 645Z is splash and dust-proof, while the X-A3 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-A3 gets 410 shots out of its NP-W126S battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack. The power pack in the X-A3 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 want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons 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-A3 117 mm 67 mm 40 mm 339 g 410 n Aug 2016 399 i
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 i
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
5.
 
Fujifilm X-T200 121 mm 84 mm 55 mm 370 g 270 n Jan 2020 699 i
6.
 
Fujifilm X-T30 118 mm 83 mm 47 mm 383 g 380 n Feb 2019 899 i
7.
 
Fujifilm X-A7 119 mm 68 mm 41 mm 320 g 440 n Sep 2019 499 i
8.
 
Fujifilm X-A5 117 mm 68 mm 40 mm 361 g 450 n Jan 2018 399 i
9.
 
Fujifilm X-E3 121 mm 74 mm 43 mm 337 g 350 n Sep 2017 899 i
10.
 
Fujifilm X-T20 118 mm 83 mm 41 mm 383 g 350 n Jan 2017 899 i
11.
 
Fujifilm X-A10 117 mm 67 mm 40 mm 331 g 410 n Dec 2016 399 i
12.
 
Fujifilm X-A2 117 mm 67 mm 40 mm 350 g 410 n Jan 2015 399 i
13.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 799 i
14.
 
Fujifilm X-A1 117 mm 67 mm 39 mm 330 g 350 n Sep 2013 399 i
15.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995 i
16.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450 i
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995 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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The X-A3 was launched at a markedly lower price (by 95 percent) than the 645Z, 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 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. 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 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-A3 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-A3 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.

Fujifilm X-A3 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the X-A3 (24MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 3.92μm for the X-A3) due to its larger sensor. However, the X-A3 is a much more recent model (by 2 years and 4 months) than the 645Z, and its sensor will have benefitted from technological advances during this time that 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 inches or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inches or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inches or 69.9 x 52.4 cm. The corresponding values for the Fujifilm X-A3 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.

The Fujifilm X-A3 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-A3 versus 645Z MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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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-A3 APS-C 24.0 6000 40001080/60p...... ..
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505 101
3.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.42381 87
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.42308 86
5.
 
Fujifilm X-T200 APS-C 24.0 6000 40004K/30p...... ..
6.
 
Fujifilm X-T30 APS-C 26.0 6240 41604K/30p...... ..
7.
 
Fujifilm X-A7 APS-C 24.0 6000 40004K/30p...... ..
8.
 
Fujifilm X-A5 APS-C 24.0 6000 40004K/15p...... ..
9.
 
Fujifilm X-E3 APS-C 24.0 6000 40004K/30p...... ..
10.
 
Fujifilm X-T20 APS-C 24.0 6000 40004K/30p...... ..
11.
 
Fujifilm X-A10 APS-C 16.0 4896 32641080/30p...... ..
12.
 
Fujifilm X-A2 APS-C 16.0 4896 32641080/30p...... ..
13.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p...... ..
14.
 
Fujifilm X-A1 APS-C 16.0 4896 32641080/30p...... ..
15.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489 102
16.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.41821 88
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.61262 82

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-A3 provides a higher frame rate than the 645Z. It can shoot video footage at 1080/60p, while the Pentax is limited to 1080/60i.

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-A3 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Fujifilm X-A3, the Pentax 645Z, and comparable 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-A3none n 3.0 1040 tilting Y 1/4000s 6.0 Y n
2.
 
Pentax 645Zoptical Y 3.2 1037 tilting n 1/4000s 3.0 n n
3.
 
Canon 5DSoptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
4.
 
Canon 5DS Roptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
5.
 
Fujifilm X-T2002360 n 3.5 2780 swivel Y 1/4000s 8.0 Y n
6.
 
Fujifilm X-T302360 n 3.0 1040 tilting Y 1/4000s 8.0 Y n
7.
 
Fujifilm X-A7none n 3.5 2760 swivel Y 1/4000s 6.0 Y n
8.
 
Fujifilm X-A5none n 3.0 1040 tilting Y 1/4000s 6.0 Y n
9.
 
Fujifilm X-E32360 n 3.0 1040 fixed Y 1/4000s 8.0 n n
10.
 
Fujifilm X-T202360 n 3.0 1040 tilting Y 1/4000s 8.0 Y n
11.
 
Fujifilm X-A10none n 3.0 1040 tilting n 1/4000s 6.0 Y n
12.
 
Fujifilm X-A2none n 3.0 920 tilting n 1/4000s 5.6 Y n
13.
 
Fujifilm X-T102360 n 3.0 920 tilting n 1/4000s 8.0 Y n
14.
 
Fujifilm X-A1none n 3.0 920 tilting n 1/4000s 5.6 Y n
15.
 
Hasselblad X1D2360 n 3.0 920 fixed Y 1/2000s 2.3 n n
16.
 
Leica SL4400 Y 3.0 1040 fixed Y 1/8000s 11.0 n n
17.
 
Pentax 645Doptical Y 3.0 921 fixed n 1/4000s 1.1 n n

One difference between the cameras concerns the presence of an on-board flash. The X-A3 has one, while the 645Z does not. While the built-in flash of the X-A3 is not very powerful, it can at times be useful as a fill-in light.

The X-A3 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 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-A3 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-A3 and the Pentax 645Z 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-A3 and the 645Z write their files to SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-A3 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-A3 and Pentax 645Z 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-A3Ystereomono--micro2.0Y--
2.
 
Pentax 645ZYstereomonoY-mini3.0---
3.
 
Canon 5DSYmonomonoY-mini3.0---
4.
 
Canon 5DS RYmonomonoY-mini3.0---
5.
 
Fujifilm X-T200YstereomonoYYmicro3.1Y-Y
6.
 
Fujifilm X-T30YstereomonoY-micro3.1Y-Y
7.
 
Fujifilm X-A7YstereomonoY-mini2.0Y-Y
8.
 
Fujifilm X-A5YstereomonoY-mini2.0Y-Y
9.
 
Fujifilm X-E3YstereomonoY-micro2.0Y-Y
10.
 
Fujifilm X-T20YstereomonoY-micro2.0Y--
11.
 
Fujifilm X-A10-stereomono--mini2.0Y--
12.
 
Fujifilm X-A2Ystereomono--mini2.0Y--
13.
 
Fujifilm X-T10YstereomonoY-micro2.0Y--
14.
 
Fujifilm X-A1Ystereomono--mini2.0Y--
15.
 
Hasselblad X1DYstereomonoYYmini3.0Y--
16.
 
Leica SLYstereomonoYYfull3.0Y--
17.
 
Pentax 645DYstereo----2.0---

It is notable that the X-A3 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-A3) 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-A3 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the X-A3 was succeeded by the Fujifilm X-A5. 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 conclusions can be drawn? Which of the two cameras – the Fujifilm X-A3 or the Pentax 645Z – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Fujifilm X-A3:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher movie framerates (1080/60p versus 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 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (117x67mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 1211g or 78 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 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 modern: Reflects 2 years and 4 months of technical progress since the 645Z launch.

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Arguments in favor of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 24MP), which boosts linear resolution by 43%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • 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: 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.
  • Longer lasting: Gets more shots (650 versus 410) 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 heavily discounted: Has been around for much longer (launched in April 2014).

If the count of individual advantages (bullet points above) is taken as a guide, the 645Z emerges as the winner of the match-up (16 : 14 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-A3 14:16 645Z

How about other alternatives? Do the specifications of the Fujifilm X-A3 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 technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the X-A3 and the 645Z 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.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major 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-A3....74/1004.5/54/5 Aug 2016 399 i
2.
 
Pentax 645Z5/5....4.5/55/5 Apr 2014 8,499 i
3.
 
Canon 5DS..+83/1004.5/54.5/5 Feb 2015 3,699 i
4.
 
Canon 5DS R5/5+83/1005/54.5/5 Feb 2015 3,699 i
5.
 
Fujifilm X-T2003.5/5..82/1004/54.5/5 Jan 2020 699 i
6.
 
Fujifilm X-T305/5+ +84/1004.5/54.5/5 Feb 2019 899 i
7.
 
Fujifilm X-A73/5..81/1004/53.5/5 Sep 2019 499 i
8.
 
Fujifilm X-A5..+..4/53.5/5 Jan 2018 399 i
9.
 
Fujifilm X-E34.5/5+84/1004.5/54.5/5 Sep 2017 899 i
10.
 
Fujifilm X-T205/5+ +82/1005/54.5/5 Jan 2017 899 i
11.
 
Fujifilm X-A10......4/54/5 Dec 2016 399 i
12.
 
Fujifilm X-A24/5....4.5/54.5/5 Jan 2015 399 i
13.
 
Fujifilm X-T104.5/5+ +80/1005/55/5 May 2015 799 i
14.
 
Fujifilm X-A1......4.5/54.5/5 Sep 2013 399 i
15.
 
Hasselblad X1D..o81/100..4/5 Jun 2016 8,995 i
16.
 
Leica SL4/5..84/1004.5/54/5 Oct 2015 7,450 i
17.
 
Pentax 645D5/5........ Mar 2010 9,995 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Fujifilm X-A3:
Check Ebay offers
Pentax 645Z:
Check Amazon price

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 make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Fujifilm X-A3 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-A3 Pentax 645Z
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax 645 mount lenses
    Launch Date August 2016 April 2014
    Launch Price USD 399 USD 8,499
    Sensor Specs Fujifilm X-A3 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 24 Megapixels 51.1 Megapixels
    Image Resolution 6000 x 4000 pixels 8256 x 6192 pixels
    Pixel Pitch 3.92 μm 5.30 μm
    Pixel Density 6.50 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60p Video 1080/60i Video
    ISO Setting 200 - 6,400 ISO 100 - 204,800 ISO
    ISO Boost 100 - 25,600 ISO no Enhancement
    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-A3 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 3.0inch 3.2inch
    LCD Resolution 1040k dots 1037k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Fujifilm X-A3 Pentax 645Z
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 6 shutter flaps/s 3 shutter flaps/s
    Electronic Shutterup to 1/32000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    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-A3 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 3.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm X-A3 Pentax 645Z
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type NP-W126S D-LI90
    Battery Life (CIPA)410 shots per charge650 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 117 x 67 x 40 mm
    (4.6 x 2.6 x 1.6 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 339 g (12.0 oz) 1550 g (54.7 oz)

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