Fujifilm X-M1 vs Pentax 645D
The Fujifilm X-M1 and the Pentax 645D are two digital cameras that were officially introduced, respectively, in June 2013 and March 2010. The X-M1 is a mirrorless interchangeable lens camera, while the 645D is a DSLR. The cameras are based on an APS-C (X-M1) 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.
|Fujifilm X-M1||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 sealed||Weathersealed body|
|350 shots per battery charge||800 shots per battery charge|
|117 x 67 x 39 mm, 330 g||156 x 117 x 119 mm, 1480 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-M1 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.
An illustration of the physical size and weight of the Fujifilm X-M1 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 views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.
The X-M1 can be obtained in three different colors (black, silver, brown), while the 645D is only available in black.
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-M1. Moreover, the 645D is substantially heavier (348 percent) than the X-M1. It is noteworthy in this context that the 645D 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.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Fujifilm X-M1||4.6 in||2.6 in||1.5 in||11.6 oz||350||n||Jun 2013||699|
|Pentax 645D||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995|
|Canon 1D X||6.2 in||6.6 in||3.3 in||54.7 oz||1120||Y||Oct 2011||6,799|
|Canon 1D Mark IV||6.1 in||6.2 in||3.1 in||43.4 oz||1500||Y||Oct 2009||4,999|
|Fujifilm X-A10||4.6 in||2.6 in||1.6 in||11.7 oz||410||n||Dec 2016||399|
|Fujifilm X-E2S||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Jan 2016||699|
|Fujifilm X-A2||4.6 in||2.6 in||1.6 in||12.3 oz||410||n||Jan 2015||399|
|Fujifilm X-T10||4.6 in||3.3 in||1.6 in||13.4 oz||350||n||May 2015||799|
|Fujifilm X-A1||4.6 in||2.6 in||1.5 in||11.6 oz||350||n||Sep 2013||399|
|Fujifilm X-E2||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Oct 2013||999|
|Fujifilm X-E1||5.1 in||3.0 in||1.5 in||12.3 oz||350||n||Sep 2012||999|
|Fujifilm X-Pro1||5.5 in||3.2 in||1.7 in||15.9 oz||300||n||Jan 2012||1,699|
|Leica S Typ 006||6.3 in||4.7 in||3.1 in||44.4 oz||..||Y||Sep 2012||21,950|
|Nikon D3S||6.3 in||6.2 in||3.5 in||43.7 oz||4200||Y||Oct 2009||5,199|
|Pentax 645Z||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499|
|Sony NEX-5R||4.4 in||2.3 in||1.5 in||9.7 oz||330||n||Aug 2012||749|
|Sony NEX-F3||4.6 in||2.6 in||1.7 in||11.1 oz||470||n||May 2012||599|
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
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-M1 was launched at a markedly lower price (by 93 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.
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Fujifilm X-M1 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-M1 has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.
With 39.5MP, the 645D offers a higher resolution than the X-M1 (16MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 4.80μm for the X-M1) due to its larger sensor. However, the X-M1 is a much more recent model (by 3 years and 3 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-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.
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 645D are ISO 100 to ISO 1600 (no boost).
For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
|Canon 1D X||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82|
|Canon 1D Mark IV||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74|
|Leica S Typ 006||Medium Format||37.5||7500||5000||none||23.9||12.2||824||76|
|Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82|
|Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
Many modern cameras cannot only take still pictures, but also record videos. The X-M1 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the X-M1 can use is 1080/30p.
Beyond 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-M1 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-M1, the Pentax 645D, and comparable cameras.
|Canon 1D X||optical||Y||3.2||1040||fixed||n||1/8000s||14.0||n||n|
|Canon 1D Mark IV||optical||Y||3.0||920||fixed||n||1/8000s||10.0||n||n|
|Leica S Typ 006||optical||Y||3.0||922||fixed||n||1/4000s||1.5||n||n|
One difference between the cameras concerns the presence of an on-board flash. The X-M1 has one, while the 645D 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 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.
Concerning the storage of imaging data, both the X-M1 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-M1 only has one slot. The X-M1 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.
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 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Canon 1D X||Y||mono||-||Y||-||mini||2.0||-||-||-|
|Canon 1D Mark IV||Y||stereo||-||Y||-||mini||2.0||-||-||-|
|Leica S Typ 006||Y||-||-||-||-||mini||2.0||-||-||-|
It is notable that the X-M1 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-M1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the X-M1 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-M1 does not have a direct successor. 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.
So what conclusions can be drawn? Which of the two cameras – the Fujifilm X-M1 or the Pentax 645D – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Fujifilm X-M1:
- 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.
- 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 (93 percent cheaper at launch).
- More modern: Reflects 3 years and 3 months of technical progress since the 645D launch.
Reasons to prefer the Pentax 645D:
- More detail: Has more megapixels (39.5 vs 16MP), which boosts linear resolution by 54%.
- 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-M1 emerges as the winner of the contest (11 : 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 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.
How about other alternatives? Do the specifications of the Fujifilm X-M1 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 incomplete and does no justice, for example, to the way the X-M1 or the 645D perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is why expert reviews are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Fujifilm X-M1||+||77/100||4.5/5||..||4.5/5||Jun 2013||699|
|Pentax 645D||..||..||..||4.5/5||..||Mar 2010||9,995|
|Canon 1D X||..||..||4.5/5||4.5/5||4.5/5||Oct 2011||6,799|
|Canon 1D Mark IV||..||89/100||..||5/5||..||Oct 2009||4,999|
|Fujifilm X-A10||..||..||4/5||..||4/5||Dec 2016||399|
|Fujifilm X-E2S||..||77/100||4.5/5||..||4.5/5||Jan 2016||699|
|Fujifilm X-A2||..||..||4.5/5||4/5||4.5/5||Jan 2015||399|
|Fujifilm X-T10||+ +||80/100||5/5||4/5||5/5||May 2015||799|
|Fujifilm X-A1||..||..||4.5/5||..||4.5/5||Sep 2013||399|
|Fujifilm X-E2||..||80/100||4.5/5||..||5/5||Oct 2013||999|
|Fujifilm X-E1||+ +||79/100||4.5/5||4.5/5||4.5/5||Sep 2012||999|
|Fujifilm X-Pro1||+ +||79/100||4.5/5||4/5||4.5/5||Jan 2012||1,699|
|Leica S Typ 006||..||..||..||..||..||Sep 2012||21,950|
|Nikon D3S||..||89/100||4.5/5||5/5||5/5||Oct 2009||5,199|
|Pentax 645Z||..||..||4.5/5||5/5||5/5||Apr 2014||8,499|
|Sony NEX-5R||..||..||4.5/5||..||4.5/5||Aug 2012||749|
|Sony NEX-F3||..||74/100||4.5/5||4.5/5||4.5/5||May 2012||599|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. 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, please note that some of the review sites have changed their methodology and reporting over time.
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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon SX410 vs Fujifilm X-M1
- Canon SX530 vs Pentax 645D
- Canon SX620 vs Fujifilm X-M1
- Canon T3 vs Fujifilm X-M1
- Fujifilm X-M1 vs Kodak S-1
- Fujifilm X-M1 vs Panasonic GX800
- Fujifilm X-M1 vs Samsung NX500
- Leica M Typ 262 vs Pentax 645D
- Leica M8 vs Pentax 645D
- Nikon D4S vs Pentax 645D
- Panasonic G80 vs Pentax 645D
- Panasonic ZS70 vs Pentax 645D
Specifications: Fujifilm X-M1 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 Model||Fujifilm X-M1||Pentax 645D|
|Camera Type||Mirrorless system camera||Digital single lens reflex|
|Camera Lens||Fujifilm X mount lenses||Pentax 645 mount lenses|
|Launch Date||June 2013||March 2010|
|Launch Price||USD 699||USD 9,995|
|Sensor Specs||Fujifilm X-M1||Pentax 645D|
|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|
|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||4.34 MP/cm2||2.72 MP/cm2|
|Moiré control||no AA 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-M1||Pentax 645D|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||98%|
|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-M1||Pentax 645D|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||5.6 shutter flaps/s||1.1 shutter flaps/s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||no|
|Connectivity Specs||Fujifilm X-M1||Pentax 645D|
|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-M1||Pentax 645D|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||350 shots per charge||800 shots per charge|
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)|
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