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Fujifilm GFX 100S II vs Pentax 645D

The Fujifilm GFX 100S II and the Pentax 645D are two professional cameras that were announced, respectively, in May 2024 and March 2010. The GFX 100S II is a mirrorless interchangeable lens camera, while the 645D is a DSLR. Both cameras are equipped with a medium format sensor. The Fujifilm has a resolution of 101.8 megapixels, whereas the Pentax provides 39.5 MP.

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

Headline Specifications
Fujifilm GFX 100S II
versus
Pentax 645D
Fujifilm GFX 100S II   Pentax 645D
Mirrorless system camera Digital single lens reflex
Fujifilm G mount lenses Pentax 645 mount lenses
101.8 MP – Medium Format sensor 39.5 MP – Medium Format sensor
4K/30p Video no Video
ISO 100-12,800 (50 - 102,400) ISO 100-1,600
Electronic viewfinder (5760k dots) Optical viewfinder
3.2" LCD – 2360k dots 3.0" LCD – 921k dots
Fully flexible touchscreen Fixed screen (not touch-sensitive)
7 shutter flaps per second 1.1 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
530 shots per battery charge800 shots per battery charge
150 x 104 x 87 mm, 883 g 156 x 117 x 119 mm, 1480 g
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Check GFX 100S II price at
amazon.com
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Check 645D offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm GFX 100S II and the Pentax 645D? 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

An illustration of the physical size and weight of the Fujifilm GFX 100S II and the Pentax 645D is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

Size Fujifilm GFX 100S II vs Pentax 645D
Compare GFX 100S II versus 645D top
Comparison GFX 100S II or 645D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645D is notably larger (17 percent) than the Fujifilm GFX 100S II. Moreover, the 645D is substantially heavier (68 percent) than the GFX 100S 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 100S II gets 530 shots out of its Fujifilm NP-W235 battery, while the 645D can take 800 images on a single charge of its Pentax D-LI90 power pack. The power pack in the GFX 100S II 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
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Fujifilm GFX 100S II 150 mm 104 mm 87 mm 883 g 530 Y May 2024 US$ 4 999 amazon.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 US$ 9 995ebay.com
3.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 US$ 4 999ebay.com
4.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 US$ 6 799ebay.com
5.
 
Canon R5 Mark II 138 mm 98 mm 88 mm 746 g 340 Y Jul 2024 US$ 4 299 amazon.com
6.
 
Fujifilm GFX 50R 161 mm 97 mm 66 mm 775 g 400 Y Sep 2018 US$ 4 499ebay.com
7.
 
Fujifilm GFX 50S 148 mm 94 mm 91 mm 740 g 400 Y Sep 2016 US$ 6 499ebay.com
8.
 
Fujifilm GFX 50S II 150 mm 104 mm 87 mm 900 g 440 Y Sep 2021 US$ 3 999 amazon.com
9.
 
Fujifilm GFX 100 156 mm 144 mm 75 mm 1320 g 800 Y May 2019 US$ 9 999ebay.com
10.
 
Fujifilm GFX 100 II 152 mm 117 mm 99 mm 1030 g 540 Y Sep 2023 US$ 7 499 amazon.com
11.
 
Fujifilm GFX 100RF 134 mm 90 mm 77 mm 735 g 820 Y Mar 2025 US$ 4 899 amazon.com
12.
 
Fujifilm GFX 100S 150 mm 104 mm 87 mm 900 g 460 Y Jan 2021 US$ 5 999 amazon.com
13.
 
Hasselblad X2D 100C 149 mm 106 mm 75 mm 895 g 420 Y Sep 2022 US$ 8 199 amazon.com
14.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 US$ 21 949ebay.com
15.
 
Leica SL3-S 141 mm 108 mm 85 mm 852 g 315 Y Jan 2025 US$ 5 299 amazon.com
16.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 US$ 5 199ebay.com
17.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 US$ 8 499ebay.com
Note: 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 GFX 100S II was launched at a markedly lower price (by 50 percent) than the 645D, 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 imaging sensor is a crucial determinant 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better 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.

Both cameras under consideration feature a medium format sensor, but their sensors differ slightly in size. The sensor area in the 645D is 1 percent bigger. 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 100S II and Pentax 645D sensor measures

Despite having a slightly smaller sensor, the Fujifilm GFX 100S II offers a higher resolution of 101.8 megapixels, compared with 39.5 MP of the Pentax 645D. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 6.06μm for the 645D). However, it should be noted that the GFX 100S II is much more recent (by 14 years and 2 months) than the 645D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

The resolution advantage of the Fujifilm GFX 100S II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GFX 100S II for good quality output (200 dots per inch) amounts to 58.2 x 43.7 inches or 147.9 x 110.9 cm, for very good quality (250 dpi) 46.6 x 34.9 inches or 118.3 x 88.8 cm, and for excellent quality (300 dpi) 38.8 x 29.1 inches or 98.6 x 74 cm. The corresponding values for the Pentax 645D are 36.3 x 27.2 inches or 92.3 x 69.1 cm for good quality, 29.1 x 21.8 inches or 73.8 x 55.3 cm for very good quality, and 24.2 x 18.1 inches or 61.5 x 46.1 cm for excellent quality prints.

The GFX 100S II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the 645D, the GFX 100S II has the capacity to capture high quality composite images (YESMP) 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 100S 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 645D are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the GFX 100S II is build around a BSI-CMOS sensor, while the 645D uses a CCD imager. 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 100S II versus 645D 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
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Fujifilm GFX 100S II Medium Format 101.8 11648 87364K/30p25.915.13720101
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
3.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
4.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
5.
 
Canon R5 Mark II Full Frame 44.8 8192 54648k/60p25.414.8333297
6.
 
Fujifilm GFX 50R Medium Format 51.1 8256 61921080/30p25.714.4316998
7.
 
Fujifilm GFX 50S Medium Format 51.1 8256 61921080/30p25.414.1297796
8.
 
Fujifilm GFX 50S II Medium Format 51.1 8256 61921080/30p25.914.83456100
9.
 
Fujifilm GFX 100 Medium Format 101.8 11648 87364K/30p25.714.5322799
10.
 
Fujifilm GFX 100 II Medium Format 101.8 11648 87368K/30p25.915.03651101
11.
 
Fujifilm GFX 100RF Medium Format 101.8 11648 87364K/30p25.915.13805101
12.
 
Fujifilm GFX 100S Medium Format 101.8 11648 87364K/30p25.814.73391100
13.
 
Hasselblad X2D 100C Medium Format 102.1 11656 8762none25.914.93550101
14.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
15.
 
Leica SL3-S Full Frame 24.0 6000 40006K/30p25.414.8338397
16.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
17.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The GFX 100S II indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the GFX 100S II can use is 4K/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the GFX 100S II has an electronic viewfinder (5760k dots), while the 645D 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 100S II offers a wider field of view (100%) than the one in the 645D (98%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the GFX 100S II has a higher magnification (0.84x vs 0.78x), 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 100S II and Pentax 645D in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty 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 100S II5760 Y3.2 / 2360 full-flex Y 1/4000s 7.0/s n Y
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
3.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
4.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
5.
 
Canon R5 Mark II5760 Y3.2 / 2100 swivel Y 1/8000s 12.0/s n Y
6.
 
Fujifilm GFX 50R3690 n3.2 / 2360 tilting Y 1/4000s 3.0/s n n
7.
 
Fujifilm GFX 50Soptional Y3.2 / 2360 full-flex Y 1/4000s 3.0/s n n
8.
 
Fujifilm GFX 50S II3690 Y3.2 / 2360 full-flex Y 1/4000s 3.0/s n Y
9.
 
Fujifilm GFX 100optional Y3.2 / 2360 full-flex Y 1/4000s 5.0/s n Y
10.
 
Fujifilm GFX 100 II9440 Y3.2 / 2360 full-flex Y 1/4000s 8.0/s n Y
11.
 
Fujifilm GFX 100RF5760 n3.2 / 2100 tilting Y 1/4000s 6.0/s n n
12.
 
Fujifilm GFX 100S3690 Y3.2 / 2360 full-flex Y 1/4000s 5.0/s n Y
13.
 
Hasselblad X2D 100C5760 Y3.6 / 2360 tilting Y 1/4000s 3.3/s n Y
14.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
15.
 
Leica SL3-S5760 Y3.2 / 2333 tilting Y 1/8000s 30.0/s n Y
16.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
17.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the GFX 100S II and the 645D is in-body image stabilization (IBIS). The GFX 100S II reduces the risk of handshake-induced blur with all attached lenses, while the 645D 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 100S 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 100S II and the Pentax 645D 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 100S II and the 645D 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 100S II supports UHS-II cards (on both slots), while the 645D cannot take advantage of Ultra High Speed SD cards.

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 100S II and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Fujifilm GFX 100S IIYstereo / monoYYmicro3.2Y-Y
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
4.
 
Canon 1D XYmono / -Y-mini2.0---
5.
 
Canon R5 Mark IIYmono / monoYYfull3.2Y-Y
6.
 
Fujifilm GFX 50RYstereo / monoYYmicro3.0Y-Y
7.
 
Fujifilm GFX 50SYstereo / monoYYmicro3.0Y--
8.
 
Fujifilm GFX 50S IIYstereo / monoYYmicro3.2Y--
9.
 
Fujifilm GFX 100Ystereo / monoYYmicro3.1Y-Y
10.
 
Fujifilm GFX 100 IIYstereo / monoYYfull3.2Y-Y
11.
 
Fujifilm GFX 100RFYstereo / monoYYmicro3.2Y-Y
12.
 
Fujifilm GFX 100SYstereo / monoYYmicro3.2Y-Y
13.
 
Hasselblad X2D 100CYstereo / mono---3.2Y--
14.
 
Leica S Typ 006Y- / ---mini2.0---
15.
 
Leica SL3-SYstereo / monoYYfull3.2Y-Y
16.
 
Nikon D3SYstereo / ---mini2.0---
17.
 
Pentax 645ZYstereo / monoY-mini3.0---

It is notable that the GFX 100S II offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

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

The GFX 100S II is a recent model that features in the current product line-up of Fujifilm. In contrast, the 645D has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the 645D was succeeded by the Pentax 645Z. 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 GFX 100S II or the Pentax 645D – 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 GFX 100S II:

  • More detail: Offers more megapixels (101.8 vs 39.5MP) with a 60% higher linear resolution.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Broader imaging potential: Can record not only still images but also 4K/30p movies.
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • 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%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.84x vs 0.78x).
  • 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 (2360k vs 921k 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.
  • Faster burst: Shoots at higher frequency (7 vs 1.1 flaps/sec) to capture the decisive moment.
  • 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 597g or 40 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.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards on both slots.
  • More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
  • More modern: Reflects 14 years and 2 months of technical progress since the 645D launch.

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Advantages of the Pentax 645D:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Longer lasting: Gets more shots (800 versus 530) out of a single battery charge.
  • More heavily discounted: Has been around for much longer (launched in March 2010).

If the count of individual advantages (bullet points above) is taken as a guide, the GFX 100S II is the clear winner of the match-up (24 : 3 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.

GFX 100S II 24:03 645D

How about other alternatives? Do the specifications of the Fujifilm GFX 100S II and the Pentax 645D 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 says little about, for example, the shooting experience and imaging performance of the GFX 100S II and the 645D in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

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], 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Fujifilm GFX 100S II............ May 2024 US$ 4 999 amazon.com
2.
 
Pentax 645D5/5.......... Mar 2010 US$ 9 995ebay.com
3.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 US$ 4 999ebay.com
4.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 US$ 6 799ebay.com
5.
 
Canon R5 Mark II......93/100.... Jul 2024 US$ 4 299 amazon.com
6.
 
Fujifilm GFX 50R5/5..5/584/1004.5/54.5/5 Sep 2018 US$ 4 499ebay.com
7.
 
Fujifilm GFX 50S....4.5/585/1005/54.5/5 Sep 2016 US$ 6 499ebay.com
8.
 
Fujifilm GFX 50S II5/5..5/587/100..5/5 Sep 2021 US$ 3 999 amazon.com
9.
 
Fujifilm GFX 1004.5/5+ +4.8/590/1005/54.5/5 May 2019 US$ 9 999ebay.com
10.
 
Fujifilm GFX 100 II5/5+5/5....4.5/5 Sep 2023 US$ 7 499 amazon.com
11.
 
Fujifilm GFX 100RF............ Mar 2025 US$ 4 899 amazon.com
12.
 
Fujifilm GFX 100S5/5+ +5/590/1005/55/5 Jan 2021 US$ 5 999 amazon.com
13.
 
Hasselblad X2D 100C4/5..5/5...... Sep 2022 US$ 8 199 amazon.com
14.
 
Leica S Typ 006............ Sep 2012 US$ 21 949ebay.com
15.
 
Leica SL3-S............ Jan 2025 US$ 5 299 amazon.com
16.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 US$ 5 199ebay.com
17.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 US$ 8 499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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.

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Check GFX 100S II price at
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Check 645D offers 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 100S II vs Pentax 645D

    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 100S II Pentax 645D
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm G mount lenses Pentax 645 mount lenses
    Launch Date May 2024 March 2010
    Launch Price USD 4,999 USD 9,995
    Sensor Specs Fujifilm GFX 100S II Pentax 645D
    Sensor Technology BSI-CMOS CCD
    Sensor Format Medium Format Sensor Medium Format Sensor
    Sensor Size 43.8 x 32.9 mm 44.0 x 33.0 mm
    Sensor Area 1441.02 mm2 1452 mm2
    Sensor Diagonal 54.8 mm 55 mm
    Crop Factor 0.79x 0.79x
    Sensor Resolution 101.8 Megapixels 39.5 Megapixels
    Image Resolution 11648 x 8736 pixels 7264 x 5440 pixels
    Pixel Pitch 3.76 μm 6.06 μm
    Pixel Density 7.06 MP/cm2 2.72 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video no Video
    ISO Setting 100 - 12,800 ISO 100 - 1,600 ISO
    ISO Boost 50 - 102,400 ISO no Enhancement
    Image Processor X-Processor 5 PRIME II
    DXO Sensor Quality (score) .. 82
    DXO Color Depth (bits) .. 24.6
    DXO Dynamic Range (EV) .. 12.6
    DXO Low Light (ISO) .. 1262
    Screen Specs Fujifilm GFX 100S II Pentax 645D
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.84x 0.78x
    Viewfinder Resolution 5760k dots
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 2360k dots 921k dots
    LCD Attachment Fully flexible screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Fujifilm GFX 100S II Pentax 645D
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 7 shutter flaps/s 1.1 shutter flaps/s
    Electronic Shutterup to 1/32000sno 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 no
    Connectivity Specs Fujifilm GFX 100S II Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 3.2 USB 2.0
    HDMI Port micro HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Fujifilm GFX 100S II Pentax 645D
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Fujifilm NP-W235 Pentax D-LI90
    Battery Life (CIPA)530 shots per charge800 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 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 883 g (31.1 oz) 1480 g (52.2 oz)
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