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Fujifilm X-T20 vs Pentax 645D

The Fujifilm X-T20 and the Pentax 645D are two digital cameras that were announced, respectively, in January 2017 and March 2010. The X-T20 is a mirrorless interchangeable lens camera, while the 645D is a DSLR. The cameras are based on an APS-C (X-T20) and a medium format (645D) sensor. The Fujifilm has a resolution of 24 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 X-T20
versus
Pentax 645D
Fujifilm X-T20   Pentax 645D
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax 645 mount lenses
24 MP – APS-C sensor 39.5 MP – Medium Format sensor
4K/30p Video no Video
ISO 200-12,800 (100 - 51,200) ISO 100-1,600
Electronic viewfinder (2360k dots) Optical viewfinder
3.0" LCD – 1040k dots 3.0" LCD – 921k dots
Tilting touchscreen Fixed screen (not touch-sensitive)
8 shutter flaps per second 1.1 shutter flaps per second
not weather sealedWeathersealed body
350 shots per battery charge800 shots per battery charge
118 x 83 x 41 mm, 383 g 156 x 117 x 119 mm, 1480 g
logo
Check X-T20 offers at
ebay.com
logo
Check 645D offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-T20 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 X-T20 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.

The X-T20 can be obtained in two different colors (black, silver), while the 645D is only available in black.

Size Fujifilm X-T20 vs Pentax 645D
Compare X-T20 versus 645D top
Comparison X-T20 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 considerably larger (86 percent) than the Fujifilm X-T20. Moreover, the 645D is substantially heavier (286 percent) than the X-T20. It is noteworthy in this context that the 645D is splash and dust-proof, while the X-T20 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-T20 gets 350 shots out of its Fujifilm NP-W126S battery, while the 645D can take 800 images on a single charge of its Pentax D-LI90 power pack. The power pack in the X-T20 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
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-T20 118 mm 83 mm 41 mm 383 g 350 n Jan 2017 899ebay.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
3.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
4.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999ebay.com
5.
 
Fujifilm X-E4 121 mm 73 mm 33 mm 364 g 380 n Jan 2021 849 amazon.com
6.
 
Fujifilm X-T30 II 118 mm 83 mm 47 mm 383 g 380 n Sep 2021 899 amazon.com
7.
 
Fujifilm X-T30 118 mm 83 mm 47 mm 383 g 380 n Feb 2019 899ebay.com
8.
 
Fujifilm X-A5 117 mm 68 mm 40 mm 361 g 450 n Jan 2018 399ebay.com
9.
 
Fujifilm X-T100 121 mm 83 mm 47 mm 448 g 430 n May 2018 599ebay.com
10.
 
Fujifilm X-E3 121 mm 74 mm 43 mm 337 g 350 n Sep 2017 899ebay.com
11.
 
Fujifilm X70 113 mm 64 mm 44 mm 340 g 330 n Jan 2016 799ebay.com
12.
 
Fujifilm X-A3 117 mm 67 mm 40 mm 339 g 410 n Aug 2016 399ebay.com
13.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 799ebay.com
14.
 
Fujifilm X-E2 129 mm 75 mm 37 mm 350 g 350 n Oct 2013 999ebay.com
15.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
16.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
17.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499ebay.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 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-T20 was launched at a markedly lower price (by 91 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. 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-T20 features an APS-C sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 295 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-T20 has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.

Fujifilm X-T20 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the X-T20 (24MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.92μm for the X-T20) due to its larger sensor. However, the X-T20 is a much more recent model (by 6 years and 10 months) than the 645D, 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 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 Pentax 645D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645D for good quality output (200 dots per inch) amounts to 36.3 x 27.2 inches or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inches or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inches or 61.5 x 46.1 cm. The corresponding values for the Fujifilm X-T20 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 X-T20 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Fujifilm X-T20 has a native sensitivity range from ISO 200 to ISO 12800, which can be extended to ISO 100-51200. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the X-T20 is build around a CMOS sensor, while the 645D uses a CCD imager. The X-T20 uses Fujifilm's X-Trans layout of photosites, while the 645D employs the more common Bayer array.

X-T20 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
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Fujifilm X-T20 APS-C 24.0 6000 40004K/30p23.913.2170481
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
3.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
4.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
5.
 
Fujifilm X-E4 APS-C 26.0 6240 41604K/30p24.213.7208585
6.
 
Fujifilm X-T30 II APS-C 26.0 6240 41604K/30p24.213.8214485
7.
 
Fujifilm X-T30 APS-C 26.0 6240 41604K/30p24.113.5189583
8.
 
Fujifilm X-A5 APS-C 24.0 6000 40004K/15p24.013.3180082
9.
 
Fujifilm X-T100 APS-C 24.0 6000 40004K/15p24.013.4182983
10.
 
Fujifilm X-E3 APS-C 24.0 6000 40004K/30p23.913.3176482
11.
 
Fujifilm X70 APS-C 16.0 4896 32641080/60p23.713.0160880
12.
 
Fujifilm X-A3 APS-C 24.0 6000 40001080/60p23.813.1166481
13.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p23.712.9154679
14.
 
Fujifilm X-E2 APS-C 16.0 4896 32641080/60p23.412.6140077
15.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
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.
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Many modern cameras are not only capable of taking still images, but can also record movies. The X-T20 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the X-T20 can use is 4K/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the X-T20 has an electronic viewfinder (2360k 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 X-T20 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. On the other hand, the viewfinder of the 645D has a higher magnification (0.78x vs 0.62x), 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 X-T20 and Pentax 645D 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 X-T202360 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y n
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
3.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
4.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
5.
 
Fujifilm X-E42360 n3.0 / 1620 tilting Y 1/4000s 8.0/s n n
6.
 
Fujifilm X-T30 II2360 n3.0 / 1620 tilting Y 1/4000s 8.0/s Y n
7.
 
Fujifilm X-T302360 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y n
8.
 
Fujifilm X-A5none n3.0 / 1040 tilting Y 1/4000s 6.0/s Y n
9.
 
Fujifilm X-T1002360 n3.0 / 1040 swivel Y 1/4000s 6.0/s Y n
10.
 
Fujifilm X-E32360 n3.0 / 1040 fixed Y 1/4000s 8.0/s n n
11.
 
Fujifilm X70optional n3.0 / 1040 tilting Y 1/4000s 8.0/s Y n
12.
 
Fujifilm X-A3none n3.0 / 1040 tilting Y 1/4000s 6.0/s Y n
13.
 
Fujifilm X-T102360 n3.0 / 920 tilting n 1/4000s 8.0/s Y n
14.
 
Fujifilm X-E22360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
15.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
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.
padding

One difference between the cameras concerns the presence of an on-board flash. The X-T20 has one, while the 645D does not. While the built-in flash of the X-T20 is not very powerful, it can at times be useful as a fill-in light.

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-T20 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-T20 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 X-T20 and the 645D write their files to SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-T20 only has one slot. The X-T20 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 645D cannot take advantage of Ultra High Speed SD 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 X-T20 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
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Fujifilm X-T20Ystereo / monoY-micro2.0Y--
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D XYmono / -Y-mini2.0---
4.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
5.
 
Fujifilm X-E4Ystereo / monoY-micro3.2Y-Y
6.
 
Fujifilm X-T30 IIYstereo / monoY-micro3.2Y-Y
7.
 
Fujifilm X-T30Ystereo / monoY-micro3.1Y-Y
8.
 
Fujifilm X-A5Ystereo / monoY-micro2.0Y-Y
9.
 
Fujifilm X-T100Ystereo / monoY-micro2.0Y-Y
10.
 
Fujifilm X-E3Ystereo / monoY-micro2.0Y-Y
11.
 
Fujifilm X70Ystereo / monoY-micro2.0Y--
12.
 
Fujifilm X-A3Ystereo / mono--micro2.0Y--
13.
 
Fujifilm X-T10Ystereo / monoY-micro2.0Y--
14.
 
Fujifilm X-E2Ystereo / monoY-micro2.0Y--
15.
 
Leica S Typ 006Y- / ---mini2.0---
16.
 
Nikon D3SYstereo / ---mini2.0---
17.
 
Pentax 645ZYstereo / monoY-mini3.0---
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It is notable that the X-T20 offers wifi support, while the 645D 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 645D (unlike the X-T20) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the X-T20 and the 645D have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the X-T20 was followed by the Fujifilm X-T100. Further information on the features and operation of the X-T20 and 645D can be found, respectively, in the Fujifilm X-T20 Manual (free pdf) or the online Pentax 645D Manual.

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Review summary

So what conclusions can be drawn? Which of the two cameras – the Fujifilm X-T20 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 X-T20:

  • 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%).
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (8 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 (118x83mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 1097g or 74 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.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (91 percent cheaper at launch).
  • More modern: Reflects 6 years and 10 months of technical progress since the 645D launch.

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Advantages of the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 24MP), which boosts linear resolution by 26%.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.62x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Longer lasting: Gets more shots (800 versus 350) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • 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 March 2010).

If the count of individual advantages (bullet points above) is taken as a guide, the X-T20 is the clear winner of the match-up (18 : 9 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-T20 18:09 645D

How about other alternatives? Do the specifications of the Fujifilm X-T20 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 X-T20 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
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-T205/5+ +5/582/1005/54.5/5 Jan 2017 899ebay.com
2.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
3.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
4.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999ebay.com
5.
 
Fujifilm X-E44/5..4/5..4.5/54/5 Jan 2021 849 amazon.com
6.
 
Fujifilm X-T30 II5/5..4/5..4.5/54.5/5 Sep 2021 899 amazon.com
7.
 
Fujifilm X-T305/5+ +5/584/1004.5/54.5/5 Feb 2019 899ebay.com
8.
 
Fujifilm X-A5..+4.1/5..4/53.5/5 Jan 2018 399ebay.com
9.
 
Fujifilm X-T1004/5+4.5/579/1004/54.5/5 May 2018 599ebay.com
10.
 
Fujifilm X-E34.5/5+4.5/584/1004.5/54.5/5 Sep 2017 899ebay.com
11.
 
Fujifilm X704.5/5....76/1004.5/54.5/5 Jan 2016 799ebay.com
12.
 
Fujifilm X-A3......74/1004.5/54/5 Aug 2016 399ebay.com
13.
 
Fujifilm X-T104.5/5+ +..80/1005/55/5 May 2015 799ebay.com
14.
 
Fujifilm X-E24/5....80/1004.5/55/5 Oct 2013 999ebay.com
15.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
16.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
17.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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 X-T20 offers at
ebay.com
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Check 645D offers at
ebay.com

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-T20 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 X-T20 Pentax 645D
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax 645 mount lenses
    Launch Date January 2017 March 2010
    Launch Price USD 899 USD 9,995
    Sensor Specs Fujifilm X-T20 Pentax 645D
    Sensor Technology CMOS CCD
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 23.6 x 15.6 mm 44.0 x 33.0 mm
    Sensor Area 368.16 mm2 1452 mm2
    Sensor Diagonal 28.3 mm 55 mm
    Crop Factor 1.5x 0.79x
    Sensor Resolution 24 Megapixels 39.5 Megapixels
    Image Resolution 6000 x 4000 pixels 7264 x 5440 pixels
    Pixel Pitch 3.92 μm 6.06 μm
    Pixel Density 6.52 MP/cm2 2.72 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video no Video
    ISO Setting 200 - 12,800 ISO 100 - 1,600 ISO
    ISO Boost 100 - 51,200 ISO no Enhancement
    Image Processor X-Processor Pro2 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 X-T20 Pentax 645D
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.62x 0.78x
    Viewfinder Resolution 2360k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 921k dots
    LCD Attachment Tilting screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Fujifilm X-T20 Pentax 645D
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 8 shutter flaps/s 1.1 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
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I no
    Connectivity Specs Fujifilm X-T20 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm X-T20 Pentax 645D
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Fujifilm NP-W126S Pentax D-LI90
    Battery Life (CIPA)350 shots per charge800 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 118 x 83 x 41 mm
    (4.6 x 3.3 x 1.6 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 383 g (13.5 oz) 1480 g (52.2 oz)
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