Pentax 645D vs Sony RX10 III
The Pentax 645D and the Sony Cyber-shot DSC-RX10 III are two digital cameras that were revealed to the public, respectively, in March 2010 and March 2016. The 645D is a DSLR, while the RX10 III is a fixed lens compact. The cameras are based on a medium format (645D) and an one-inch (RX10 III) sensor. The Pentax has a resolution of 39.5 megapixels, whereas the Sony provides 20 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Pentax 645D||Sony RX10 III|
|Digital single lens reflex||Fixed lens compact camera|
|Pentax 645 mount lenses||24-600mm f/2.4-4.0|
|39.5 MP, Medium Format Sensor||20 MP, 1" Sensor|
|no Video||4K/30p Video|
|ISO 100-1600||ISO 100-12800 (64-25600)|
|Optical viewfinder||Electronic viewfinder (2359k dots)|
|3.0" LCD, 921k dots||3.0" LCD, 1229k dots|
|Fixed screen (not touch-sensitive)||Tilting screen (not touch-sensitive)|
|1.1 shutter flaps per second||14 shutter flaps per second|
|Weathersealed body||Weathersealed body|
|800 shots per battery charge||420 shots per battery charge|
|156 x 117 x 119 mm, 1480 g||133 x 94 x 127 mm, 1051 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645D and the Sony Cyber-shot DSC-RX10 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.
Body comparison: Pentax 645D vs Sony RX10 III
An illustration of the physical size and weight of the Pentax 645D and the Sony RX10 III 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 dimensions are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX10 III is considerably smaller (32 percent) than the Pentax 645D. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX10 III has a lens built in, whereas the 645D is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
Concerning battery life, the 645D gets 800 shots out of its D-LI90 battery, while the RX10 III can take 420 images on a single charge of its NP-FW50 power pack. The power pack in the RX10 III can be charged via the USB port, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|Pentax 645D»||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995||-||Pentax 645D|
|Sony RX10 III«||5.2 in||3.7 in||5.0 in||37.1 oz||420||Y||Mar 2016||1,499||Sony RX10 III|
|Canon 1D X Mark II« »||6.2 in||6.6 in||3.3 in||54.0 oz||1210||Y||Feb 2016||5,999||Canon 1D X Mark II|
|Canon 1D X« »||6.2 in||6.6 in||3.3 in||54.7 oz||1120||Y||Oct 2011||6,799||-||Canon 1D X|
|Canon 1D Mark IV« »||6.1 in||6.2 in||3.1 in||43.4 oz||1500||Y||Oct 2009||4,999||-||Canon 1D Mark IV|
|Leica S Typ 006« »||6.3 in||4.7 in||3.1 in||44.4 oz||..||Y||Sep 2012||21,950||-||Leica S Typ 006|
|Nikon D850« »||5.7 in||4.9 in||3.1 in||35.5 oz||1840||Y||Jul 2017||3,299||Nikon D850|
|Nikon D5« »||6.3 in||6.3 in||3.6 in||49.9 oz||3780||Y||Jan 2016||6,499||Nikon D5|
|Nikon D810« »||5.7 in||4.8 in||3.2 in||34.6 oz||1200||Y||Jun 2014||3,299||-||Nikon D810|
|Nikon D3S« »||6.3 in||6.2 in||3.5 in||43.7 oz||4200||Y||Oct 2009||5,199||-||Nikon D3S|
|Pentax 645Z« »||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499||Pentax 645Z|
|Sony RX10 IV« »||5.2 in||3.7 in||5.7 in||38.6 oz||400||Y||Sep 2017||1,699||Sony RX10 IV|
|Sony RX0« »||2.3 in||1.6 in||1.2 in||3.9 oz||240||Y||Aug 2017||699||-||Sony RX0|
|Sony RX100 V« »||4.0 in||2.3 in||1.6 in||10.5 oz||220||n||Oct 2016||999||Sony RX100 V|
|Sony RX10 II« »||5.1 in||3.5 in||4.0 in||28.7 oz||400||Y||Jun 2015||1,299||-||Sony RX10 II|
|Sony A7R« »||5.0 in||3.7 in||1.9 in||16.4 oz||340||Y||Oct 2013||2,299||-||Sony A7R|
|Sony RX10« »||5.1 in||3.5 in||4.0 in||28.7 oz||420||Y||Oct 2013||1,299||-||Sony RX10|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The RX10 III was launched at a lower price than the 645D, despite having a lens built in. 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: Pentax 645D vs Sony RX10 III
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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Pentax 645D features a medium format sensor and the Sony RX10 III an one-inch sensor. The sensor area in the RX10 III is 92 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 2.7. The sensor in the 645D has a native 4:3 aspect ratio, while the one in the RX10 III offers a 3:2 aspect.
With 39.5MP, the 645D offers a higher resolution than the RX10 III (20MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 2.41μm for the RX10 III) due to its larger sensor. However, the RX10 III is a much more recent model (by 6 years) than the 645D, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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 inch or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inch or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inch or 61.5 x 46.1 cm. The corresponding values for the Sony RX10 III are 27.4 x 18.2 inch or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inch or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inch or 46.3 x 30.9 cm for excellent quality prints.
The Pentax 645D has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Sony Cyber-shot DSC-RX10 III are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 64-25600.
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"). Of the two cameras under review, the 645D provides substantially higher image quality than the RX10 III, with an overall score that is 12 points higher. This advantage is based on 1.5 bits higher color depth, and 1.4 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|Pentax 645D»||Medium Format||39.5||7264||5440||-||24.6||12.6||1262||82||Pentax 645D|
|Sony RX10 III«||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70||Sony RX10 III|
|Canon 1D X Mark II« »||Full Frame||20.0||5472||3648||4K/60p||24.1||13.5||3207||88||Canon 1D X Mark II|
|Canon 1D X« »||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82||Canon 1D X|
|Canon 1D Mark IV« »||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74||Canon 1D Mark IV|
|Leica S Typ 006« »||Medium Format||37.5||7500||5000||-||23.9||12.2||824||76||Leica S Typ 006|
|Nikon D850« »||Full Frame||45.4||8256||5504||4K/30p||26.4||14.8||2660||100||Nikon D850|
|Nikon D5« »||Full Frame||20.7||5588||3712||4K/30p||25.1||12.3||2343||88||Nikon D5|
|Nikon D810« »||Full Frame||36.2||7360||4912||1080/60p||25.7||14.8||2853||97||Nikon D810|
|Nikon D3S« »||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82||Nikon D3S|
|Pentax 645Z« »||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101||Pentax 645Z|
|Sony RX10 IV« »||1-inch||20.0||5472||3648||4K/30p||-||-||-||-||Sony RX10 IV|
|Sony RX0« »||1-inch||15.4||4800||3200||1080/60p||22.4||12.4||548||68||Sony RX0|
|Sony RX100 V« »||1-inch||20.0||5472||3648||4K/30p||22.8||12.4||586||70||Sony RX100 V|
|Sony RX10 II« »||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70||Sony RX10 II|
|Sony A7R« »||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95||Sony A7R|
|Sony RX10« »||1-inch||20.0||5472||3648||1080/60p||22.9||12.6||474||69||Sony RX10|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The RX10 III indeed provides for movie recording, while the 645D does not. The highest resolution format that the RX10 III can use is 4K/30p.
Feature comparison: Pentax 645D vs Sony RX10 III
Beyond body and sensor, cameras can and do differ across a range of features. For example, the RX10 III has an electronic viewfinder (2359k dots), while the 645D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the RX10 III offers a wider field of view (100%) than the one in the 645D (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645D has a higher magnification (0.78x vs 0.70x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Pentax 645D, the Sony RX10 III, and comparable cameras.
|Pentax 645D»||optical||Y||3.0||921||fixed||n||1/4000s||1.1||n||n||Pentax 645D|
|Sony RX10 III«||2359||Y||3.0||1229||tilting||n||1/2000s||14.0||Y||Y||Sony RX10 III|
|Canon 1D X Mark II« »||optical||Y||3.2||1620||fixed||Y||1/8000s||16.0||n||n||Canon 1D X Mark II|
|Canon 1D X« »||optical||Y||3.2||1040||fixed||n||1/8000s||14.0||n||n||Canon 1D X|
|Canon 1D Mark IV« »||optical||Y||3.0||920||fixed||n||1/8000s||10.0||n||n||Canon 1D Mark IV|
|Leica S Typ 006« »||optical||Y||3.0||922||fixed||n||1/4000s||1.5||n||n||Leica S Typ 006|
|Nikon D850« »||optical||Y||3.2||2359||tilting||Y||1/8000s||9.0||n||n||Nikon D850|
|Nikon D5« »||optical||Y||3.2||2359||fixed||Y||1/8000s||14.0||n||n||Nikon D5|
|Nikon D810« »||optical||Y||3.2||1229||fixed||n||1/8000s||5.0||Y||n||Nikon D810|
|Nikon D3S« »||optical||Y||3.0||921||fixed||n||1/8000s||11.0||n||n||Nikon D3S|
|Pentax 645Z« »||optical||Y||3.2||1037||tilting||n||1/4000s||3.0||n||n||Pentax 645Z|
|Sony RX10 IV« »||2359||Y||3.0||1440||tilting||Y||1/2000s||24.0||Y||Y||Sony RX10 IV|
|Sony RX0« »||-||n||1.5||230||fixed||n||..||5.5||n||n||Sony RX0|
|Sony RX100 V« »||2359||n||3.0||1229||tilting||n||1/2000s||24.0||Y||Y||Sony RX100 V|
|Sony RX10 II« »||2359||Y||3.0||1229||tilting||n||1/3200s||14.0||Y||Y||Sony RX10 II|
|Sony A7R« »||2400||n||3.0||1230||tilting||n||1/8000s||4.0||n||n||Sony A7R|
|Sony RX10« »||1440||Y||3.0||1229||tilting||n||1/3200s||10.0||Y||Y||Sony RX10|
One difference between the cameras concerns the presence of an on-board flash. The RX10 III has one, while the 645D does not. While the built-in flash of the RX10 III is not very powerful, it can at times be useful as a fill-in light.
The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the RX10 III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The 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 645D writes its imaging data to SDXC cards, while the RX10 III uses SDXC or Memory Stick PRO Duo cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the RX10 III only has one slot. The RX10 III 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: Pentax 645D vs Sony RX10 III
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 Pentax 645D and Sony Cyber-shot DSC-RX10 III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Pentax 645D»||Y||stereo||-||-||-||-||2.0||-||-||-||Pentax 645D|
|Sony RX10 III«||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 III|
|Canon 1D X Mark II« »||Y||mono||mono||Y||Y||mini||3.0||-||-||-||Canon 1D X Mark II|
|Canon 1D X« »||Y||mono||-||Y||-||mini||2.0||-||-||-||Canon 1D X|
|Canon 1D Mark IV« »||Y||stereo||-||Y||-||mini||2.0||-||-||-||Canon 1D Mark IV|
|Leica S Typ 006« »||Y||-||-||-||-||mini||2.0||-||-||-||Leica S Typ 006|
|Nikon D850« »||Y||stereo||mono||Y||Y||mini||3.0||Y||Y||Y||Nikon D850|
|Nikon D5« »||Y||stereo||mono||Y||Y||mini||3.0||-||-||-||Nikon D5|
|Nikon D810« »||Y||stereo||mono||Y||Y||mini||3.0||Y||-||-||Nikon D810|
|Nikon D3S« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Nikon D3S|
|Pentax 645Z« »||Y||stereo||mono||Y||-||mini||3.0||-||-||-||Pentax 645Z|
|Sony RX10 IV« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 IV|
|Sony RX0« »||-||stereo||mono||Y||-||micro||2.0||Y||-||Y||Sony RX0|
|Sony RX100 V« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Sony RX100 V|
|Sony RX10 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 II|
|Sony A7R« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R|
|Sony RX10« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10|
It is notable that the RX10 III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 645D does not offer wifi capability.
Studio photographers will appreciate that the Pentax 645D (unlike the RX10 III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The RX10 III is a recent model that features in the current product line-up of Sony. In contrast, the 645D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 645D was succeeded by the Pentax 645Z. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax and Sony websites.
Review summary: Pentax 645D vs Sony RX10 III
So what is the bottom line? Is there a clear favorite between the Pentax 645D and the Sony RX10 III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Pentax 645D:
- More detail: Offers more megapixels (39.5 vs 20MP) with a 38% higher linear resolution.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (12 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.5 bits more color depth).
- Better low-light sensitivity: Requires less light for good images (1.4 stops ISO advantage).
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- Longer lasting: Can take more shots (800 versus 420) on a single battery charge.
- 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 available for much longer (launched in March 2010).
Reasons to prefer the Sony Cyber-shot DSC-RX10 III:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
- More detailed LCD: Has a higher resolution rear screen (1229k vs 921k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster burst: Shoots at higher frequency (14 vs 1.1 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Ready to shoot: Comes with an integrated lens, while the 645D requires a separate lens.
- More compact: Is smaller (133x94mm vs 156x117mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight even though it has a lens built in (unlike the 645D).
- Easier travel charging: Can be conveniently charged via its USB port.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 6 years of technical progress since the 645D launch.
If the number of relative strengths (bullet points above) is taken as a guide, the RX10 III is the clear winner of the contest (18 : 14 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 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.
How about other alternatives? Do the specifications of the Pentax 645D and the Sony RX10 III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Superzoom Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 645D or the RX10 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: Pentax 645D vs Sony RX10 III
This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera 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.
|Pentax 645D»||-||-||-||4.5/5||-||Mar 2010||9,995||-||Pentax 645D|
|Sony RX10 III«||+||84/100||4.5/5||4.5/5||4.5/5||Mar 2016||1,499||Sony RX10 III|
|Canon 1D X Mark II« »||-||89/100||4.5/5||5/5||4.5/5||Feb 2016||5,999||Canon 1D X Mark II|
|Canon 1D X« »||-||-||4.5/5||4.5/5||4.5/5||Oct 2011||6,799||-||Canon 1D X|
|Canon 1D Mark IV« »||-||89/100||-||5/5||-||Oct 2009||4,999||-||Canon 1D Mark IV|
|Leica S Typ 006« »||-||-||-||-||-||Sep 2012||21,950||-||Leica S Typ 006|
|Nikon D850« »||+ +||89/100||4.5/5||5/5||5/5||Jul 2017||3,299||Nikon D850|
|Nikon D5« »||-||89/100||4.5/5||5/5||5/5||Jan 2016||6,499||Nikon D5|
|Nikon D810« »||-||86/100||5/5||4.5/5||4.5/5||Jun 2014||3,299||-||Nikon D810|
|Nikon D3S« »||-||89/100||4.5/5||5/5||5/5||Oct 2009||5,199||-||Nikon D3S|
|Pentax 645Z« »||-||-||4.5/5||5/5||5/5||Apr 2014||8,499||Pentax 645Z|
|Sony RX10 IV« »||+||84/100||4.5/5||-||5/5||Sep 2017||1,699||Sony RX10 IV|
|Sony RX0« »||-||-||3.5/5||-||4/5||Aug 2017||699||-||Sony RX0|
|Sony RX100 V« »||+ +||83/100||4/5||5/5||4.5/5||Oct 2016||999||Sony RX100 V|
|Sony RX10 II« »||+ +||82/100||4.5/5||4.5/5||4/5||Jun 2015||1,299||-||Sony RX10 II|
|Sony A7R« »||+ +||82/100||4.5/5||5/5||5/5||Oct 2013||2,299||-||Sony A7R|
|Sony RX10« »||+||80/100||4.5/5||4.5/5||4.5/5||Oct 2013||1,299||-||Sony RX10|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
The above review scores should be interpreted 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
Other camera comparisons
Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 1300D vs Pentax 645D
- Canon 600D vs Sony RX10 III
- Canon 700D vs Sony RX10 III
- Canon 750D vs Pentax 645D
- Canon R vs Sony RX10 III
- Fujifilm GFX 50R vs Sony RX10 III
- Fujifilm X-H1 vs Pentax 645D
- Fujifilm X100F vs Sony RX10 III
- Nikon D5600 vs Sony RX10 III
- Nikon D90 vs Sony RX10 III
- Panasonic GH2 vs Pentax 645D
- Sony RX10 III vs Sony RX100 III
Specifications: Pentax 645D vs Sony RX10 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 Model||Pentax 645D||Sony RX10 III|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Pentax 645 mount lenses||24-600mm f/2.4-4.0|
|Launch Date||March 2010||March 2016|
|Launch Price||USD 9995||USD 1499|
|Sensor Specs||Pentax 645D||Sony RX10 III|
|Sensor Format||Medium Format Sensor||1" Sensor|
|Sensor Size||44.0 x 33.0 mm||13.2 x 8.8 mm|
|Sensor Area||1452 mm2||116.16 mm2|
|Sensor Diagonal||55 mm||15.9 mm|
|Sensor Resolution||39.5 Megapixels||20 Megapixels|
|Image Resolution||7264 x 5440 pixels||5472 x 3648 pixels|
|Pixel Pitch||6.06 μm||2.41 μm|
|Pixel Density||2.72 MP/cm2||17.18 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||no Video||4K/30p Video|
|ISO Setting||100-1600 ISO||100-12800 ISO|
|ISO Boost||no Enhancement||64-25600 ISO|
|Image Processor||PRIME II||BIONZ X|
|DXO Sensor Quality (score)||82||70|
|DXO Color Depth (bits)||24.6||23.1|
|DXO Dynamic Range (EV)||12.6||12.6|
|DXO Low Light (ISO)||1262||472|
|Screen Specs||Pentax 645D||Sony RX10 III|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||98%||100%|
|Viewfinder Resolution||2359k dots|
|Top-Level Screen||Control Panel||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||921k dots||1229k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Shooting Specs||Pentax 645D||Sony RX10 III|
|Autofocus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000/s||1/2000/s|
|Continuous Shooting||1.1 shutter flaps/s||14 shutter flaps/s|
|Electronic Shutter||no E-Shutter||up to 1/32000s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Fill Flash||no On-Board Flash||Build-in Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Dual card slots||Single card slot|
|UHS card support||no||UHS-I|
|Connectivity Specs||Pentax 645D||Sony RX10 III|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no 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|
|Near-Field Communication||no NFC||NFC built-in|
|Body Specs||Pentax 645D||Sony RX10 III|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Type||D-LI90 power pack||NP-FW50 power pack|
|Battery Life (CIPA)||800 shots per charge||420 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
133 x 94 x 127 mm
(5.2 x 3.7 x 5.0 in)
|Camera Weight||1480 g (52.2 oz)||1051 g (37.1 oz)|
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