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Fujifilm GFX 50S II vs Pentax 645Z

The Fujifilm GFX 50S II and the Pentax 645Z are two professional cameras that were announced, respectively, in September 2021 and April 2014. The GFX 50S II is a mirrorless interchangeable lens camera, while the 645Z is a DSLR. Both cameras are equipped with a medium format sensor. Both cameras offer a resolution of 51.1 megapixels.

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

Headline Specifications
Fujifilm GFX 50S II
versus
Pentax 645Z
Fujifilm GFX 50S II   Pentax 645Z
Mirrorless system camera Digital single lens reflex
Fujifilm G mount lenses Pentax 645 mount lenses
51.1 MP – Medium Format sensor 51.1 MP – Medium Format sensor
1080/30p Video 1080/60i Video
ISO 100-12,800 (50 - 102,400) ISO 100-204,800
Electronic viewfinder (3690k dots) Optical viewfinder
3.2" LCD – 2360k dots 3.2" LCD – 1037k dots
Fully flexible touchscreen Tilting screen (no touchscreen)
3 shutter flaps per second 3 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
440 shots per battery charge650 shots per battery charge
150 x 104 x 87 mm, 900 g 156 x 117 x 123 mm, 1550 g
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Check GFX 50S II price at
amazon.com
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Check 645Z price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm GFX 50S II 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.

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Body comparison

The physical size and weight of the Fujifilm GFX 50S II and the Pentax 645Z are illustrated 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 width, height and depth measures are rounded to the nearest millimeter.

Size Fujifilm GFX 50S II vs Pentax 645Z
Compare GFX 50S II versus 645Z top
Comparison GFX 50S II 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 notably larger (17 percent) than the Fujifilm GFX 50S II. Moreover, the 645Z is substantially heavier (72 percent) than the GFX 50S II. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 GFX 50S II gets 440 shots out of its NP-W235 battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack. The power pack in the GFX 50S II can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm GFX 50S II 150 mm 104 mm 87 mm 900 g 440 Y Sep 2021 3,999 amazon.com
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 amazon.com
3.
 
Canon R5 C 142 mm 101 mm 111 mm 770 g 320 Y Jan 2022 4,499 amazon.com
4.
 
Canon R5 138 mm 98 mm 88 mm 738 g 320 Y Jul 2020 3,899 amazon.com
5.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
6.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
7.
 
Fujifilm GFX 100 II 152 mm 117 mm 99 mm 1030 g 540 Y Sep 2023 7,499 amazon.com
8.
 
Fujifilm GFX 100S 150 mm 104 mm 87 mm 900 g 460 Y Jan 2021 5,999 amazon.com
9.
 
Fujifilm GFX 100 156 mm 144 mm 75 mm 1320 g 800 Y May 2019 9,999 amazon.com
10.
 
Fujifilm GFX 50R 161 mm 97 mm 66 mm 775 g 400 Y Sep 2018 4,499ebay.com
11.
 
Fujifilm GFX 50S 148 mm 94 mm 91 mm 740 g 400 Y Sep 2016 6,499ebay.com
12.
 
Hasselblad X2D 100C 149 mm 106 mm 75 mm 895 g 420 Y Sep 2022 8,199 amazon.com
13.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995ebay.com
14.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450ebay.com
15.
 
Panasonic S1R 149 mm 110 mm 97 mm 1016 g 380 Y Feb 2019 3,699 amazon.com
16.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
17.
 
Sony A1 129 mm 97 mm 81 mm 737 g 530 Y Jan 2021 6,499 amazon.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will obviously take relative prices into account. 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 GFX 50S II was launched at a markedly lower price (by 53 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 imaging sensor is a crucial determinant 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.

Both cameras under consideration feature a medium format sensor, but their sensors differ slightly in size. The sensor area in the 645Z is 1 percent smaller. They nevertheless have the same format factor of 0.79. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Fujifilm GFX 50S II and Pentax 645Z sensor measures

Even though the GFX 50S II has a slightly larger sensor, both cameras offer the same resolution of 51.1 megapixels. This implies that the GFX 50S II has a lower pixel density and larger individual pixels (with a pixel pitch of 5.33μm versus 5.30μm for the 645Z), which gives it a potential advantage in terms of light gathering capacity. In addition, the GFX 50S II is much more recent (by 7 years and 4 months) than the 645Z, and its sensor will have benefitted from technological advances during this time. 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.

Unlike the 645Z, the GFX 50S II has the capacity to capture high quality composite images (205MP) 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 GFX 50S II has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 50-102400. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

GFX 50S II 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
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Fujifilm GFX 50S II Medium Format 51.1 8256 61921080/30p25.914.83456100
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon R5 C Full Frame 44.8 8192 54648k/60p25.414.5308296
4.
 
Canon R5 Full Frame 44.8 8192 54648K/30p25.314.6304295
5.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
6.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
7.
 
Fujifilm GFX 100 II Medium Format 101.8 11648 87368K/30p25.915.03651101
8.
 
Fujifilm GFX 100S Medium Format 101.8 11648 87364K/30p25.814.73391100
9.
 
Fujifilm GFX 100 Medium Format 101.8 11648 87364K/30p25.714.5322799
10.
 
Fujifilm GFX 50R Medium Format 51.1 8256 61921080/30p25.714.4316998
11.
 
Fujifilm GFX 50S Medium Format 51.1 8256 61921080/30p25.414.1297796
12.
 
Hasselblad X2D 100C Medium Format 102.1 11656 8762none25.914.93550101
13.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
14.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
15.
 
Panasonic S1R Full Frame 46.7 8368 55844K/60p26.414.13525100
16.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
17.
 
Sony A1 Full Frame 49.8 8640 57608k/30p25.914.5316398
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the 645Z provides a faster frame rate than the GFX 50S II. It can shoot movie footage at 1080/60i, while the Fujifilm is limited to 1080/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the GFX 50S II has an electronic viewfinder (3690k dots), while the 645Z 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 viewfinder in the GFX 50S II offers a wider field of view (100%) than the one in the 645Z (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.77x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Fujifilm GFX 50S II and Pentax 645Z in connection with corresponding information for a sample of similar cameras.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Fujifilm GFX 50S II3690 Y3.2 / 2360 full-flex Y 1/4000s 3.0/s n Y
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
3.
 
Canon R5 C5760 Y3.2 / 2100 swivel Y 1/8000s 12.0/s n n
4.
 
Canon R55760 Y3.2 / 2100 swivel Y 1/8000s 12.0/s n Y
5.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
6.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
7.
 
Fujifilm GFX 100 II9440 Y3.2 / 2360 full-flex Y 1/4000s 8.0/s n Y
8.
 
Fujifilm GFX 100S3690 Y3.2 / 2360 full-flex Y 1/4000s 5.0/s n Y
9.
 
Fujifilm GFX 100optional Y3.2 / 2360 full-flex Y 1/4000s 5.0/s n Y
10.
 
Fujifilm GFX 50R3690 n3.2 / 2360 tilting Y 1/4000s 3.0/s n n
11.
 
Fujifilm GFX 50Soptional Y3.2 / 2360 full-flex Y 1/4000s 3.0/s n n
12.
 
Hasselblad X2D 100C5760 Y3.6 / 2360 tilting Y 1/4000s 3.3/s n Y
13.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3/s n n
14.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0/s n n
15.
 
Panasonic S1R5760 Y3.2 / 2100 full-flex Y 1/8000s 9.0/s n Y
16.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
17.
 
Sony A19437 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One feature that differentiates the GFX 50S II and the 645Z is in-body image stabilization (IBIS). The GFX 50S II reduces the risk of handshake-induced blur with all attached lenses, while the 645Z offers no blur reduction with lenses that themselves do not provide optical image stabilization.

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 GFX 50S II 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 GFX 50S II 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 GFX 50S II and the 645Z write their files to SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The GFX 50S II supports UHS-II cards (on both slots), while the 645Z can use UHS-I cards.

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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 GFX 50S II 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
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Fujifilm GFX 50S IIYstereo / monoYYmicro3.2Y--
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon R5 CYstereo / monoYYmicro3.2Y-Y
4.
 
Canon R5Ymono / monoYYmicro3.2Y-Y
5.
 
Canon 5DSYmono / monoY-mini3.0---
6.
 
Canon 5DS RYmono / monoY-mini3.0---
7.
 
Fujifilm GFX 100 IIYstereo / monoYYfull3.2Y-Y
8.
 
Fujifilm GFX 100SYstereo / monoYYmicro3.2Y-Y
9.
 
Fujifilm GFX 100Ystereo / monoYYmicro3.1Y-Y
10.
 
Fujifilm GFX 50RYstereo / monoYYmicro3.0Y-Y
11.
 
Fujifilm GFX 50SYstereo / monoYYmicro3.0Y--
12.
 
Hasselblad X2D 100CYstereo / mono---3.2Y--
13.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
14.
 
Leica SLYstereo / monoYYfull3.0Y--
15.
 
Panasonic S1RYstereo / monoYYfull3.1Y-Y
16.
 
Pentax 645DYstereo / ----2.0---
17.
 
Sony A1Ystereo / monoYYfull3.2Y-Y
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It is notable that the GFX 50S II has a headphone jack, which is not present on the 645Z This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the GFX 50S II and the 645Z are recent models that are part of the current product line-up. The 645Z replaced the earlier Pentax 645D, while the GFX 50S II followed on from the Fujifilm GFX 50S. Further information on the features and operation of the GFX 50S II and 645Z can be found, respectively, in the Fujifilm GFX 50S II Manual (free pdf) or the online Pentax 645Z Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Fujifilm GFX 50S II and the Pentax 645Z? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Fujifilm GFX 50S II:

  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
  • More detailed LCD: Has a higher resolution rear screen (2360k vs 1037k dots).
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (150x104mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 650g or 42 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More affordable: Was introduced into a lower priced category (53 percent cheaper at launch).
  • More modern: Reflects 7 years and 4 months of technical progress since the 645Z launch.

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Reasons to prefer the Pentax 645Z:

  • Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.77x).
  • Longer lasting: Gets more shots (650 versus 440) out of a single battery charge.
  • More heavily discounted: Has been around for much longer (launched in April 2014).

If the number of relative strengths (bullet points above) is taken as a guide, the GFX 50S II is the clear winner of the match-up (17 : 5 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

GFX 50S II 17:05 645Z

How about other alternatives? Do the specifications of the Fujifilm GFX 50S II 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the GFX 50S II 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], 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
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm GFX 50S II5/5..5/587/100..5/5 Sep 2021 3,999 amazon.com
2.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499 amazon.com
3.
 
Canon R5 C..+ +........ Jan 2022 4,499 amazon.com
4.
 
Canon R54.5/5+4/591/1004.5/54.5/5 Jul 2020 3,899 amazon.com
5.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 3,699ebay.com
6.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
7.
 
Fujifilm GFX 100 II............ Sep 2023 7,499 amazon.com
8.
 
Fujifilm GFX 100S5/5+ +5/590/1005/55/5 Jan 2021 5,999 amazon.com
9.
 
Fujifilm GFX 1004.5/5+ +4.8/590/1005/54.5/5 May 2019 9,999 amazon.com
10.
 
Fujifilm GFX 50R5/5..5/584/1004.5/54.5/5 Sep 2018 4,499ebay.com
11.
 
Fujifilm GFX 50S....4.5/585/1005/54.5/5 Sep 2016 6,499ebay.com
12.
 
Hasselblad X2D 100C4/5..5/5...... Sep 2022 8,199 amazon.com
13.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 8,995ebay.com
14.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 7,450ebay.com
15.
 
Panasonic S1R4.5/5..4.6/589/1004.5/54.5/5 Feb 2019 3,699 amazon.com
16.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
17.
 
Sony A15/5o4.5/593/1004.5/55/5 Jan 2021 6,499 amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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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 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.

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Check GFX 50S II price at
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Check 645Z price at
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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 GFX 50S II 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 GFX 50S II Pentax 645Z
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm G mount lenses Pentax 645 mount lenses
    Launch Date September 2021 April 2014
    Launch Price USD 3,999 USD 8,499
    Sensor Specs Fujifilm GFX 50S II Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format Medium Format Sensor Medium Format Sensor
    Sensor Size 44.0 x 33.0 mm 43.8 x 32.8 mm
    Sensor Area 1452 mm2 1436.64 mm2
    Sensor Diagonal 55 mm 54.7 mm
    Crop Factor 0.79x 0.79x
    Sensor Resolution 51.1 Megapixels 51.1 Megapixels
    Image Resolution 8256 x 6192 pixels 8256 x 6192 pixels
    Pixel Pitch 5.33 μm 5.30 μm
    Pixel Density 3.52 MP/cm2 3.56 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/30p Video 1080/60i Video
    ISO Setting 100 - 12,800 ISO 100 - 204,800 ISO
    ISO Boost 50 - 102,400 ISO no Enhancement
    Image Processor X Processor 4 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 GFX 50S II Pentax 645Z
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.77x 0.78x
    Viewfinder Resolution 3690k dots
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.2inch
    LCD Resolution 2360k dots 1037k dots
    LCD Attachment Fully flexible screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Fujifilm GFX 50S II 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 3 shutter flaps/s 3 shutter flaps/s
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support Dual UHS-II UHS-I
    Connectivity Specs Fujifilm GFX 50S II Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 3.2 USB 3.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm GFX 50S II Pentax 645Z
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-W235 D-LI90
    Battery Life (CIPA)440 shots per charge650 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 150 x 104 x 87 mm
    (5.9 x 4.1 x 3.4 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 900 g (31.7 oz) 1550 g (54.7 oz)
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    Check 645Z price at
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