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Fujifilm X-A1 vs Pentax 645D

The Fujifilm X-A1 and the Pentax 645D are two digital cameras that were revealed to the public, respectively, in September 2013 and March 2010. The X-A1 is a mirrorless interchangeable lens camera, while the 645D is a DSLR. The cameras are based on an APS-C (X-A1) and a medium format (645D) sensor. The Fujifilm has a resolution of 16 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-A1
versus
Pentax 645D
Fujifilm X-A1   Pentax 645D
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax 645 mount lenses
16 MP – APS-C sensor 39.5 MP – Medium Format sensor
1080/30p Video no Video
ISO 200-6,400 (100 - 25,600) ISO 100-1,600
No viewfinder, LCD framing Optical viewfinder
3.0" LCD – 920k dots 3.0" LCD – 921k dots
Tilting screen (no touchscreen) Fixed screen (not touch-sensitive)
5.6 shutter flaps per second 1.1 shutter flaps per second
not weather sealedWeathersealed body
350 shots per battery charge800 shots per battery charge
117 x 67 x 39 mm, 330 g 156 x 117 x 119 mm, 1480 g
Fujifilm X-A1:
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Pentax 645D:
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Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-A1 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.

Body comparison

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

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

Size Fujifilm X-A1 vs Pentax 645D
Compare X-A1 versus 645D top
Comparison X-A1 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 (133 percent) than the Fujifilm X-A1. Moreover, the 645D is substantially heavier (348 percent) than the X-A1. It is noteworthy in this context that the 645D is splash and dust-proof, while the X-A1 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the X-A1 gets 350 shots out of its NP-W126 battery, while the 645D can take 800 images on a single charge of its D-LI90 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-A1 117 mm 67 mm 39 mm 330 g 350 n Sep 2013 399i
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995i
3.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799i
4.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999i
5.
 
Fujifilm X-A5 117 mm 68 mm 40 mm 361 g 450 n Jan 2018 399i
6.
 
Fujifilm X-A3 117 mm 67 mm 40 mm 339 g 410 n Aug 2016 399i
7.
 
Fujifilm X-A10 117 mm 67 mm 40 mm 331 g 410 n Dec 2016 399i
8.
 
Fujifilm X-E2S 129 mm 75 mm 37 mm 350 g 350 n Jan 2016 699i
9.
 
Fujifilm X-A2 117 mm 67 mm 40 mm 350 g 410 n Jan 2015 399i
10.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 799i
11.
 
Fujifilm X-E2 129 mm 75 mm 37 mm 350 g 350 n Oct 2013 999i
12.
 
Fujifilm X-M1 117 mm 67 mm 39 mm 330 g 350 n Jun 2013 699i
13.
 
Fujifilm X-E1 129 mm 75 mm 38 mm 350 g 350 n Sep 2012 999i
14.
 
Fujifilm X-Pro1 140 mm 82 mm 43 mm 450 g 300 n Jan 2012 1,699i
15.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950i
16.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199i
17.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 i
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 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 X-A1 was launched at a markedly lower price (by 96 percent) than the 645D, 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.

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Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Fujifilm X-A1 features an APS-C sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 293 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 0.79. The sensor in the X-A1 has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.

Fujifilm X-A1 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the X-A1 (16MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 4.80μm for the X-A1) due to its larger sensor. However, the X-A1 is a much more recent model (by 3 years and 6 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 the 645D has no anti-alias filter installed, so that it can capture all the detail its 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-A1 are 24.5 x 16.3 inches or 62.2 x 41.5 cm for good quality, 19.6 x 13.1 inches or 49.7 x 33.2 cm for very good quality, and 16.3 x 10.9 inches or 41.5 x 27.6 cm for excellent quality prints.

The Fujifilm X-A1 has a native sensitivity range from ISO 200 to ISO 6400, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

X-A1 versus 645D MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). 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-A1 APS-C 16.0 4896 32641080/30p23.412.6139076
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-A5 APS-C 24.0 6000 40004K/15p24.013.3180082
6.
 
Fujifilm X-A3 APS-C 24.0 6000 40001080/60p23.813.1166481
7.
 
Fujifilm X-A10 APS-C 16.0 4896 32641080/30p23.913.2169181
8.
 
Fujifilm X-E2S APS-C 16.0 4896 32641080/60p23.713.0160880
9.
 
Fujifilm X-A2 APS-C 16.0 4896 32641080/30p23.612.8151579
10.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p23.712.9154679
11.
 
Fujifilm X-E2 APS-C 16.0 4896 32641080/60p23.412.6140077
12.
 
Fujifilm X-M1 APS-C 16.0 4896 32641080/30p23.412.6137176
13.
 
Fujifilm X-E1 APS-C 16.0 4896 32641080/24p23.212.4129875
14.
 
Fujifilm X-Pro1 APS-C 16.0 4896 32641080/24p23.112.3123874
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.

Many modern cameras are not only capable of taking still images, but can also record movies. The X-A1 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the X-A1 can use is 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the 645D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the X-A1 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Fujifilm X-A1, the Pentax 645D, and comparable cameras.

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Core Features
    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-A1none n3.0 / 920 tilting n 1/4000s 5.6/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-A5none n3.0 / 1040 tilting Y 1/4000s 6.0/s Y n
6.
 
Fujifilm X-A3none n3.0 / 1040 tilting Y 1/4000s 6.0/s Y n
7.
 
Fujifilm X-A10none n3.0 / 1040 tilting n 1/4000s 6.0/s Y n
8.
 
Fujifilm X-E2S2360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
9.
 
Fujifilm X-A2none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
10.
 
Fujifilm X-T102360 n3.0 / 920 tilting n 1/4000s 8.0/s Y n
11.
 
Fujifilm X-E22360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
12.
 
Fujifilm X-M1none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
13.
 
Fujifilm X-E12360 n2.8 / 460 fixed n 1/4000s 6.0/s Y n
14.
 
Fujifilm X-Pro11440 n3.0 / 1230 fixed n 1/4000s 6.0/s n 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
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

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

The X-A1 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the 645D does not have a selfie-screen.

The Pentax 645D has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The X-A1 writes its imaging data to SDHC cards, while the 645D uses SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-A1 only has one slot. The X-A1 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.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Fujifilm X-A1 and Pentax 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
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Fujifilm X-A1Ystereo / mono--mini2.0Y--
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D XYmono / -Y-mini2.0---
4.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
5.
 
Fujifilm X-A5Ystereo / monoY-micro2.0Y-Y
6.
 
Fujifilm X-A3Ystereo / mono--micro2.0Y--
7.
 
Fujifilm X-A10-stereo / mono--micro2.0Y--
8.
 
Fujifilm X-E2SYstereo / monoY-micro2.0Y--
9.
 
Fujifilm X-A2Ystereo / mono--mini2.0Y--
10.
 
Fujifilm X-T10Ystereo / monoY-micro2.0Y--
11.
 
Fujifilm X-E2Ystereo / monoY-micro2.0Y--
12.
 
Fujifilm X-M1Ystereo / mono--mini2.0Y--
13.
 
Fujifilm X-E1Ystereo / monoY-mini2.0---
14.
 
Fujifilm X-Pro1Ystereo / mono--mini2.0---
15.
 
Leica S Typ 006Y- / ---mini2.0---
16.
 
Nikon D3SYstereo / ---mini2.0---
17.
 
Pentax 645ZYstereo / monoY-mini3.0---

It is notable that the X-A1 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-A1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the X-A1 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-A1 was followed by the Fujifilm X-A2. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Fujifilm and Pentax websites.

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Review summary

So what is the bottom line? Is the Fujifilm X-A1 better than the Pentax 645D or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Fujifilm X-A1:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Broader imaging potential: Can record not only still images but also 1080/30p movies.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (5.6 vs 1.1 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (117x67mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 1150g or 78 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (96 percent cheaper at launch).
  • More modern: Reflects 3 years and 6 months of technical progress since the 645D launch.

ilogo

Arguments in favor of the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 16MP), which boosts linear resolution by 54%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • 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.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • 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 number of relative strengths (bullet points above) is taken as a guide, the X-A1 emerges as the winner of the contest (13 : 10 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

X-A1 13:10 645D

How about other alternatives? Do the specifications of the Fujifilm X-A1 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 technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the X-A1 or the 645D. 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 why expert reviews are important. 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-A1........4.5/54.5/5 Sep 2013 399i
2.
 
Pentax 645D5/5.......... Mar 2010 9,995i
3.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799i
4.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999i
5.
 
Fujifilm X-A5..+4.1/5..4/53.5/5 Jan 2018 399i
6.
 
Fujifilm X-A3......74/1004.5/54/5 Aug 2016 399i
7.
 
Fujifilm X-A10........4/54/5 Dec 2016 399i
8.
 
Fujifilm X-E2S4.5/5....77/1004.5/54.5/5 Jan 2016 699i
9.
 
Fujifilm X-A24/5......4.5/54.5/5 Jan 2015 399i
10.
 
Fujifilm X-T104.5/5+ +..80/1005/55/5 May 2015 799i
11.
 
Fujifilm X-E24/5....80/1004.5/55/5 Oct 2013 999i
12.
 
Fujifilm X-M13/5+..77/1004.5/54.5/5 Jun 2013 699i
13.
 
Fujifilm X-E14/5+ +..79/1004.5/54.5/5 Sep 2012 999i
14.
 
Fujifilm X-Pro15/5+ +..79/1004.5/54.5/5 Jan 2012 1,699i
15.
 
Leica S Typ 006............ Sep 2012 21,950i
16.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199i
17.
 
Pentax 645Z5/5......4.5/55/5 Apr 2014 8,499 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Fujifilm X-A1:
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Pentax 645D:
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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just use the search menu 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-A1 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-A1 Pentax 645D
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax 645 mount lenses
    Launch Date September 2013 March 2010
    Launch Price USD 399 USD 9,995
    Sensor Specs Fujifilm X-A1 Pentax 645D
    Sensor Technology CMOS CCD
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 23.5 x 15.7 mm 44.0 x 33.0 mm
    Sensor Area 368.95 mm2 1452 mm2
    Sensor Diagonal 28.3 mm 55 mm
    Crop Factor 1.5x 0.79x
    Sensor Resolution 16 Megapixels 39.5 Megapixels
    Image Resolution 4896 x 3264 pixels 7264 x 5440 pixels
    Pixel Pitch 4.80 μm 6.06 μm
    Pixel Density 4.33 MP/cm2 2.72 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/30p Video no Video
    ISO Setting 200 - 6,400 ISO 100 - 1,600 ISO
    ISO Boost 100 - 25,600 ISO no Enhancement
    Image Processor EXR Processor II 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-A1 Pentax 645D
    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
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 920k dots 921k dots
    LCD Attachment Tilting screen Fixed screen
    Shooting Specs Fujifilm X-A1 Pentax 645D
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 5.6 shutter flaps/s 1.1 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDHC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I no
    Connectivity Specs Fujifilm X-A1 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm X-A1 Pentax 645D
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type NP-W126 D-LI90
    Battery Life (CIPA)350 shots per charge800 shots per charge
    Body Dimensions 117 x 67 x 39 mm
    (4.6 x 2.6 x 1.5 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 330 g (11.6 oz) 1480 g (52.2 oz)
    Fujifilm X-A1:
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    Pentax 645D:
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