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Fujifilm X-Pro1 vs Pentax K-3 III

The Fujifilm X-Pro1 and the Pentax K-3 III are two enthusiast cameras that were revealed to the public, respectively, in January 2012 and March 2021. The X-Pro1 is a mirrorless interchangeable lens camera, while the K-3 III is a DSLR. Both cameras are equipped with an APS-C sensor. The Fujifilm has a resolution of 16 megapixels, whereas the Pentax provides 25.6 MP.

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

Headline Specifications
Fujifilm X-Pro1
versus
Pentax K-3 III
Fujifilm X-Pro1   Pentax K-3 III
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax K mount lenses
16 MP – APS-C sensor 25.6 MP – APS-C sensor
1080/24p Video 4K/30p Video
ISO 200-6,400 (100 - 25,600) ISO 100-160,000
Electronic viewfinder (1440k dots) Optical viewfinder
3.0" LCD – 1230k dots 3.2" LCD – 1620k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
6 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
300 shots per battery charge800 shots per battery charge
140 x 82 x 43 mm, 450 g 135 x 104 x 74 mm, 820 g
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Check X-Pro1 offers at
ebay.com
logo
Check K-3 III price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-Pro1 and the Pentax K-3 III? 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-Pro1 and the Pentax K-3 III 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 K-3 III can be obtained in two different colors (black, silver), while the X-Pro1 is only available in black.

Size Fujifilm X-Pro1 vs Pentax K-3 III
Compare X-Pro1 versus K-3 III top
Comparison X-Pro1 or K-3 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 III is notably larger (22 percent) than the Fujifilm X-Pro1. Moreover, the K-3 III is substantially heavier (82 percent) than the X-Pro1. It is noteworthy in this context that the K-3 III is splash and dust-proof, while the X-Pro1 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-Pro1 gets 300 shots out of its Fujifilm NP-W126 battery, while the K-3 III can take 800 images on a single charge of its Pentax D-LI90 power pack.

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 X-Pro1 140 mm 82 mm 43 mm 450 g 300 n Jan 2012 US$ 1 699ebay.com
2.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 US$ 1 999 amazon.com
3.
 
Fujifilm X-A1 117 mm 67 mm 39 mm 330 g 350 n Sep 2013 US$ 399ebay.com
4.
 
Fujifilm X-E1 129 mm 75 mm 38 mm 350 g 350 n Sep 2012 US$ 999ebay.com
5.
 
Fujifilm X-E2 129 mm 75 mm 37 mm 350 g 350 n Oct 2013 US$ 999ebay.com
6.
 
Fujifilm X-H1 140 mm 97 mm 86 mm 673 g 310 Y Feb 2018 US$ 1 899ebay.com
7.
 
Fujifilm X-M1 117 mm 67 mm 39 mm 330 g 350 n Jun 2013 US$ 699ebay.com
8.
 
Fujifilm X-Pro2 141 mm 83 mm 46 mm 495 g 350 Y Jan 2016 US$ 1 699ebay.com
9.
 
Fujifilm X-T1 129 mm 90 mm 47 mm 440 g 350 Y Jan 2014 US$ 1 299ebay.com
10.
 
Fujifilm X-T3 133 mm 93 mm 59 mm 539 g 390 Y Sep 2018 US$ 1 499ebay.com
11.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 US$ 799ebay.com
12.
 
Fujifilm X-T100 121 mm 83 mm 47 mm 448 g 430 n May 2018 US$ 599ebay.com
13.
 
Fujifilm X100S 127 mm 74 mm 54 mm 445 g 330 n Jan 2013 US$ 1 299ebay.com
14.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 US$ 1 299ebay.com
15.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 US$ 1 099ebay.com
16.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 US$ 649ebay.com
17.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 US$ 1 099ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

The price is, of course, an important factor in any camera decision. 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-Pro1 was launched at a somewhat lower price (by 15 percent) than the K-3 III, which makes it more attractive for photographers on a tight budget. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the K-3 III is 2 percent smaller. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Fujifilm X-Pro1 and Pentax K-3 III sensor measures

Despite having a slightly smaller sensor, the K-3 III offers a higher resolution of 25.6 megapixels, compared with 16 MP of the X-Pro1. 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 4.80μm for the X-Pro1). However, it should be noted that the K-3 III is much more recent (by 9 years and 2 months) than the X-Pro1, 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 Pentax K-3 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-3 III for good quality output (200 dots per inch) amounts to 31 x 20.6 inches or 78.6 x 52.4 cm, for very good quality (250 dpi) 24.8 x 16.5 inches or 62.9 x 41.9 cm, and for excellent quality (300 dpi) 20.6 x 13.8 inches or 52.4 x 35 cm. The corresponding values for the Fujifilm X-Pro1 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.

Unlike the X-Pro1, the K-3 III 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 X-Pro1 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 K-3 III are ISO 100 to ISO 160000 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. The X-Pro1 uses Fujifilm's X-Trans layout of photosites, while the K-3 III employs the more common Bayer array.

X-Pro1 versus K-3 III MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 X-Pro1 APS-C 16.0 4896 32641080/24p23.112.3123874
2.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
3.
 
Fujifilm X-A1 APS-C 16.0 4896 32641080/30p23.412.6139076
4.
 
Fujifilm X-E1 APS-C 16.0 4896 32641080/24p23.212.4129875
5.
 
Fujifilm X-E2 APS-C 16.0 4896 32641080/60p23.412.6140077
6.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
7.
 
Fujifilm X-M1 APS-C 16.0 4896 32641080/30p23.412.6137176
8.
 
Fujifilm X-Pro2 APS-C 24.0 6000 40001080/60p23.713.0160880
9.
 
Fujifilm X-T1 APS-C 16.0 4896 32641080/60p23.512.7142677
10.
 
Fujifilm X-T3 APS-C 26.0 6240 41604K/60p24.013.4185383
11.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p23.712.9154679
12.
 
Fujifilm X-T100 APS-C 24.0 6000 40004K/15p24.013.4182983
13.
 
Fujifilm X100S APS-C 16.0 4896 32641080/60p23.312.5132975
14.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
15.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
16.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
17.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the K-3 III provides a better video resolution than the X-Pro1. It can shoot movie footage at 4K/30p, while the Fujifilm is limited to 1080/24p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the X-Pro1 has an electronic viewfinder (1440k dots), while the K-3 III 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 table below summarizes some of the other core capabilities of the Fujifilm X-Pro1 and Pentax K-3 III 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 X-Pro11440 n3.0 / 1230 fixed n 1/4000s 6.0/s n n
2.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
3.
 
Fujifilm X-A1none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
4.
 
Fujifilm X-E12360 n2.8 / 460 fixed n 1/4000s 6.0/s Y n
5.
 
Fujifilm X-E22360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
6.
 
Fujifilm X-H13690 Y3.0 / 1040 full-flex Y 1/8000s 14.0/s n Y
7.
 
Fujifilm X-M1none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
8.
 
Fujifilm X-Pro22360 n3.0 / 1620 fixed n 1/8000s 8.0/s n n
9.
 
Fujifilm X-T12360 n3.0 / 1040 tilting n 1/4000s 8.0/s n n
10.
 
Fujifilm X-T33690 n3.0 / 1040 full-flex Y 1/8000s 11.0/s n n
11.
 
Fujifilm X-T102360 n3.0 / 920 tilting n 1/4000s 8.0/s Y n
12.
 
Fujifilm X-T1002360 n3.0 / 1040 swivel Y 1/4000s 6.0/s Y n
13.
 
Fujifilm X100S2360 n2.8 / 460 fixed n 1/4000s 6.0/s Y n
14.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
15.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
16.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
17.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The K-3 III has a touchscreen, while the X-Pro1 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The Pentax K-3 III 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.

Concerning the storage of imaging data, both the X-Pro1 and the K-3 III write their files to SDXC cards. The K-3 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the X-Pro1 only has one slot. The K-3 III supports UHS-II cards (on its first slot), while the X-Pro1 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 X-Pro1 and Pentax K-3 III 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 X-Pro1Ystereo / mono--mini2.0---
2.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
3.
 
Fujifilm X-A1Ystereo / mono--mini2.0Y--
4.
 
Fujifilm X-E1Ystereo / monoY-mini2.0---
5.
 
Fujifilm X-E2Ystereo / monoY-micro2.0Y--
6.
 
Fujifilm X-H1Ystereo / monoY-micro3.0Y--
7.
 
Fujifilm X-M1Ystereo / mono--mini2.0Y--
8.
 
Fujifilm X-Pro2Ystereo / monoY-micro2.0Y--
9.
 
Fujifilm X-T1Ystereo / monoY-mini2.0Y--
10.
 
Fujifilm X-T3Ystereo / monoYYmicro3.1Y-Y
11.
 
Fujifilm X-T10Ystereo / monoY-micro2.0Y--
12.
 
Fujifilm X-T100Ystereo / monoY-micro2.0Y-Y
13.
 
Fujifilm X100SYstereo / mono--micro2.0---
14.
 
Pentax K-3Ymono / monoYYmini3.0---
15.
 
Pentax K-3 IIYmono / monoYYmini3.0---
16.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
17.
 
Pentax KPYstereo / monoY--2.0Y--

It is notable that the K-3 III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the X-Pro1 does not provide wifi capability.

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

Travel and landscape photographers will find it useful that the K-3 III has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The K-3 III is a recent model that features in the current product line-up of Pentax. In contrast, the X-Pro1 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the X-Pro1 was succeeded by the Fujifilm X-Pro2. Further information on the features and operation of the X-Pro1 and K-3 III can be found, respectively, in the Fujifilm X-Pro1 Manual (free pdf) or the online Pentax K-3 III Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Fujifilm X-Pro1 and the Pentax K-3 III? Which camera is better? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Fujifilm X-Pro1:

  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More compact: Is smaller (140x82mm vs 135x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 370g or 45 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More affordable: Was introduced into a lower priced segment (15 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in January 2012).

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Advantages of the Pentax K-3 III:

  • More detail: Has more megapixels (25.6 vs 16MP), which boosts linear resolution by 26%.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/24p).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1620k vs 1230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 6 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (800 versus 300) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • 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.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 9 years and 2 months of technical progress since the X-Pro1 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the K-3 III is the clear winner of the contest (23 : 6 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-Pro1 06:23 K-3 III

How about other alternatives? Do the specifications of the Fujifilm X-Pro1 and the Pentax K-3 III 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-Pro1 or the K-3 III. 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 why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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 X-Pro15/5+ +..79/1004.5/54.5/5 Jan 2012 US$ 1 699ebay.com
2.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 US$ 1 999 amazon.com
3.
 
Fujifilm X-A1........4.5/54.5/5 Sep 2013 US$ 399ebay.com
4.
 
Fujifilm X-E14/5+ +..79/1004.5/54.5/5 Sep 2012 US$ 999ebay.com
5.
 
Fujifilm X-E24/5....80/1004.5/55/5 Oct 2013 US$ 999ebay.com
6.
 
Fujifilm X-H1..+5/586/1004.5/54.5/5 Feb 2018 US$ 1 899ebay.com
7.
 
Fujifilm X-M13/5+..77/1004.5/54.5/5 Jun 2013 US$ 699ebay.com
8.
 
Fujifilm X-Pro2..+..83/1004.5/54.5/5 Jan 2016 US$ 1 699ebay.com
9.
 
Fujifilm X-T15/5+ +..84/1005/55/5 Jan 2014 US$ 1 299ebay.com
10.
 
Fujifilm X-T35/5+ +4.5/588/1005/55/5 Sep 2018 US$ 1 499ebay.com
11.
 
Fujifilm X-T104.5/5+ +..80/1005/55/5 May 2015 US$ 799ebay.com
12.
 
Fujifilm X-T1004/5+4.5/579/1004/54.5/5 May 2018 US$ 599ebay.com
13.
 
Fujifilm X100S5/5+ +..81/1004.5/55/5 Jan 2013 US$ 1 299ebay.com
14.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 US$ 1 299ebay.com
15.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 US$ 1 099ebay.com
16.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 US$ 649ebay.com
17.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 US$ 1 099ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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 K-3 III price at
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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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Fujifilm X-Pro1 vs Pentax K-3 III

    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-Pro1 Pentax K-3 III
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax K mount lenses
    Launch Date January 2012 March 2021
    Launch Price USD 1,699 USD 1,999
    Sensor Specs Fujifilm X-Pro1 Pentax K-3 III
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 23.6 x 15.6 mm 23.3 x 15.5 mm
    Sensor Area 368.16 mm2 361.15 mm2
    Sensor Diagonal 28.3 mm 28 mm
    Crop Factor 1.5x 1.5x
    Sensor Resolution 16 Megapixels 25.6 Megapixels
    Image Resolution 4896 x 3264 pixels 6192 x 4128 pixels
    Pixel Pitch 4.80 μm 3.76 μm
    Pixel Density 4.34 MP/cm2 7.08 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/24p Video 4K/30p Video
    ISO Setting 200 - 6,400 ISO 100 - 160,000 ISO
    ISO Boost 100 - 25,600 ISO no Enhancement
    Image Processor EXR Processor PRIME V
    Screen Specs Fujifilm X-Pro1 Pentax K-3 III
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x
    Viewfinder Resolution 1440k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 1230k dots 1620k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Fujifilm X-Pro1 Pentax K-3 III
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 6 shutter flaps/s 12 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board 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 Single UHS-II
    Connectivity Specs Fujifilm X-Pro1 Pentax K-3 III
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.2
    HDMI Port mini HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Geotagging no internal GPS GPS built-in
    Body Specs Fujifilm X-Pro1 Pentax K-3 III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Fujifilm NP-W126 Pentax D-LI90
    Battery Life (CIPA)300 shots per charge800 shots per charge
    Body Dimensions 140 x 82 x 43 mm
    (5.5 x 3.2 x 1.7 in)
    135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    Camera Weight 450 g (15.9 oz) 820 g (28.9 oz)
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