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Fujifilm X-M1 vs Pentax K-3 III

The Fujifilm X-M1 and the Pentax K-3 III are two digital cameras that were officially introduced, respectively, in June 2013 and March 2021. The X-M1 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-M1
versus
Pentax K-3 III
Fujifilm X-M1   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
1080/30p Video 4K/30p Video
ISO 200-6,400 (100 - 25,600) ISO 100-160,000
No viewfinder, LCD framing Optical viewfinder
3.0" LCD – 920k dots 3.2" LCD – 1620k dots
Tilting screen (no touchscreen) Fixed touchscreen
5.6 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
350 shots per battery charge800 shots per battery charge
117 x 67 x 39 mm, 330 g 135 x 104 x 74 mm, 820 g
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Check X-M1 offers at
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Check K-3 III price at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-M1 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

The side-by-side display below illustrates the physical size and weight of the Fujifilm X-M1 and the Pentax K-3 III. 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 dimensions are rounded to the nearest millimeter.

The X-M1 can be obtained in three different colors (black, silver, brown), while the K-3 III is available in two color-versions (black, silver).

Size Fujifilm X-M1 vs Pentax K-3 III
Compare X-M1 versus K-3 III top
Comparison X-M1 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 considerably larger (79 percent) than the Fujifilm X-M1. Moreover, the K-3 III is substantially heavier (148 percent) than the X-M1. It is noteworthy in this context that the K-3 III is splash and dust-proof, while the X-M1 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-M1 gets 350 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 table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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 (USD)
Street
Price
1.
 
Fujifilm X-M1 117 mm 67 mm 39 mm 330 g 350 n Jun 2013 699ebay.com
2.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 amazon.com
3.
 
Fujifilm X-A1 117 mm 67 mm 39 mm 330 g 350 n Sep 2013 399ebay.com
4.
 
Fujifilm X-A2 117 mm 67 mm 40 mm 350 g 410 n Jan 2015 399ebay.com
5.
 
Fujifilm X-A10 117 mm 67 mm 40 mm 331 g 410 n Dec 2016 399ebay.com
6.
 
Fujifilm X-E1 129 mm 75 mm 38 mm 350 g 350 n Sep 2012 999ebay.com
7.
 
Fujifilm X-E2 129 mm 75 mm 37 mm 350 g 350 n Oct 2013 999ebay.com
8.
 
Fujifilm X-E2S 129 mm 75 mm 37 mm 350 g 350 n Jan 2016 699ebay.com
9.
 
Fujifilm X-H1 140 mm 97 mm 86 mm 673 g 310 Y Feb 2018 1,899ebay.com
10.
 
Fujifilm X-Pro1 140 mm 82 mm 43 mm 450 g 300 n Jan 2012 1,699ebay.com
11.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 799ebay.com
12.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299ebay.com
13.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099ebay.com
14.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649ebay.com
15.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099ebay.com
16.
 
Sony NEX-5R 111 mm 59 mm 39 mm 276 g 330 n Aug 2012 749ebay.com
17.
 
Sony NEX-F3 117 mm 67 mm 42 mm 314 g 470 n May 2012 599ebay.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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The X-M1 was launched at a markedly lower price (by 65 percent) than the K-3 III, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 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-M1 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-M1. 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-M1). However, it should be noted that the K-3 III is much more recent (by 7 years and 9 months) than the X-M1, 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-M1 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-M1, 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-M1 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-M1 uses Fujifilm's X-Trans layout of photosites, while the K-3 III employs the more common Bayer array.

X-M1 versus K-3 III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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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-M1 APS-C 16.0 4896 32641080/30p23.412.6137176
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-A2 APS-C 16.0 4896 32641080/30p23.612.8151579
5.
 
Fujifilm X-A10 APS-C 16.0 4896 32641080/30p23.913.2169181
6.
 
Fujifilm X-E1 APS-C 16.0 4896 32641080/24p23.212.4129875
7.
 
Fujifilm X-E2 APS-C 16.0 4896 32641080/60p23.412.6140077
8.
 
Fujifilm X-E2S APS-C 16.0 4896 32641080/60p23.713.0160880
9.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
10.
 
Fujifilm X-Pro1 APS-C 16.0 4896 32641080/24p23.112.3123874
11.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p23.712.9154679
12.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
13.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
14.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
15.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
16.
 
Sony NEX-5R APS-C 16.0 4912 32641080/60i23.713.191078
17.
 
Sony NEX-F3 APS-C 16.0 4912 32641080/60i22.712.3111473
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the K-3 III provides a better video resolution than the X-M1. It can shoot movie footage at 4K/30p, while the Fujifilm is limited to 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the K-3 III has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the X-M1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Fujifilm X-M1 and Pentax K-3 III along with similar information for a selection of comparators.

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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-M1none n3.0 / 920 tilting n 1/4000s 5.6/s Y 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-A2none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
5.
 
Fujifilm X-A10none n3.0 / 1040 tilting n 1/4000s 6.0/s Y n
6.
 
Fujifilm X-E12360 n2.8 / 460 fixed n 1/4000s 6.0/s Y n
7.
 
Fujifilm X-E22360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
8.
 
Fujifilm X-E2S2360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
9.
 
Fujifilm X-H13690 Y3.0 / 1040 full-flex Y 1/8000s 14.0/s n Y
10.
 
Fujifilm X-Pro11440 n3.0 / 1230 fixed n 1/4000s 6.0/s n n
11.
 
Fujifilm X-T102360 n3.0 / 920 tilting n 1/4000s 8.0/s Y n
12.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
13.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
14.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
15.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
16.
 
Sony NEX-5Roptional n3.0 / 920 tilting Y 1/4000s 10.0/s n n
17.
 
Sony NEX-F3optional n3.0 / 920 tilting n 1/4000s 5.5/s Y n
Note: *) 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-M1 has one, while the K-3 III does not. While the built-in flash of the X-M1 is not very powerful, it can at times be useful as a fill-in light.

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-M1 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-M1 only has one slot. The K-3 III supports UHS-II cards (on its first slot), while the X-M1 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-M1 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-M1Ystereo / mono--mini2.0Y--
2.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
3.
 
Fujifilm X-A1Ystereo / mono--mini2.0Y--
4.
 
Fujifilm X-A2Ystereo / mono--mini2.0Y--
5.
 
Fujifilm X-A10-stereo / mono--micro2.0Y--
6.
 
Fujifilm X-E1Ystereo / monoY-mini2.0---
7.
 
Fujifilm X-E2Ystereo / monoY-micro2.0Y--
8.
 
Fujifilm X-E2SYstereo / monoY-micro2.0Y--
9.
 
Fujifilm X-H1Ystereo / monoY-micro3.0Y--
10.
 
Fujifilm X-Pro1Ystereo / mono--mini2.0---
11.
 
Fujifilm X-T10Ystereo / monoY-micro2.0Y--
12.
 
Pentax K-3Ymono / monoYYmini3.0---
13.
 
Pentax K-3 IIYmono / monoYYmini3.0---
14.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
15.
 
Pentax KPYstereo / monoY--2.0Y--
16.
 
Sony NEX-5RYstereo / mono--mini2.0Y--
17.
 
Sony NEX-F3Ystereo / mono--mini2.0---

It is notable that the K-3 III has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The X-M1 lacks such a headphone port.

Studio photographers will appreciate that the Pentax K-3 III (unlike the X-M1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

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-M1 has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the X-M1 from Fujifilm. Further information on the features and operation of the X-M1 and K-3 III can be found, respectively, in the Fujifilm X-M1 Manual (free pdf) or the online Pentax K-3 III Manual.

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Review summary

So what conclusions can be drawn? Is the Fujifilm X-M1 better than the Pentax K-3 III or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Fujifilm X-M1:

  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • More compact: Is smaller (117x67mm vs 135x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 490g or 60 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.
  • More affordable: Was introduced into a lower priced category (65 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in June 2013).

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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 1080/30p).
  • 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.
  • 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.
  • 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 920k 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 5.6 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 350) 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 wireless transfer: Supports Bluetooth for image sharing without cables.
  • 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.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 7 years and 9 months of technical progress since the X-M1 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the K-3 III is the clear winner of the contest (23 : 7 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

X-M1 07:23 K-3 III

How about other alternatives? Do the specifications of the Fujifilm X-M1 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it says little about, for example, the shooting experience and imaging performance of the X-M1 and the K-3 III in practical situations. 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Fujifilm X-M13/5+..77/1004.5/54.5/5 Jun 2013 699ebay.com
2.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 amazon.com
3.
 
Fujifilm X-A1........4.5/54.5/5 Sep 2013 399ebay.com
4.
 
Fujifilm X-A24/5......4.5/54.5/5 Jan 2015 399ebay.com
5.
 
Fujifilm X-A10........4/54/5 Dec 2016 399ebay.com
6.
 
Fujifilm X-E14/5+ +..79/1004.5/54.5/5 Sep 2012 999ebay.com
7.
 
Fujifilm X-E24/5....80/1004.5/55/5 Oct 2013 999ebay.com
8.
 
Fujifilm X-E2S4.5/5....77/1004.5/54.5/5 Jan 2016 699ebay.com
9.
 
Fujifilm X-H1..+5/586/1004.5/54.5/5 Feb 2018 1,899ebay.com
10.
 
Fujifilm X-Pro15/5+ +..79/1004.5/54.5/5 Jan 2012 1,699ebay.com
11.
 
Fujifilm X-T104.5/5+ +..80/1005/55/5 May 2015 799ebay.com
12.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 1,299ebay.com
13.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099ebay.com
14.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 649ebay.com
15.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099ebay.com
16.
 
Sony NEX-5R........4.5/54.5/5 Aug 2012 749ebay.com
17.
 
Sony NEX-F34/5....74/1004.5/54.5/5 May 2012 599ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Fujifilm X-M1 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-M1 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 June 2013 March 2021
    Launch Price USD 699 USD 1,999
    Sensor Specs Fujifilm X-M1 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 1080/30p 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 II PRIME V
    Screen Specs Fujifilm X-M1 Pentax K-3 III
    Viewfinder Type no viewfinder Optical viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.70x
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 920k dots 1620k dots
    LCD Attachment Tilting screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Fujifilm X-M1 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 5.6 shutter flaps/s 12 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    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 Single UHS-II
    Connectivity Specs Fujifilm X-M1 Pentax K-3 III
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync 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 Wifi built-in Wifi built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Geotagging no internal GPS GPS built-in
    Body Specs Fujifilm X-M1 Pentax K-3 III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Fujifilm NP-W126 Pentax 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)
    135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    Camera Weight 330 g (11.6 oz) 820 g (28.9 oz)
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