Pentax 645D vs Sony A900
The Pentax 645D and the Sony Alpha A900 are two professional cameras that were officially introduced, respectively, in March 2010 and September 2008. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a medium format (645D) and a full frame (A900) sensor. The Pentax has a resolution of 39.5 megapixels, whereas the Sony provides 24.4 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Pentax 645D||Sony A900|
|Digital single lens reflex||Digital single lens reflex|
|Pentax 645 mount lenses||Sony A mount lenses|
|39.5 MP, Medium Format Sensor||24.4 MP, Full Frame Sensor|
|no Video||no Video|
|ISO 100-1600||ISO 200-3200 (100-6400)|
|Optical viewfinder||Optical viewfinder|
|3.0" LCD, 921k dots||3.0" LCD, 922k dots|
|Fixed screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|1.1 shutter flaps per second||5 shutter flaps per second|
|Lens stabilization only||In-body stabilization|
|Weathersealed body||Weathersealed body|
|800 shots per battery charge||880 shots per battery charge|
|156 x 117 x 119 mm, 1480 g||156 x 117 x 82 mm, 895 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645D and the Sony Alpha A900? 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 Pentax 645D and the Sony A900 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.
In this particular case, the Pentax 645D and the Sony A900 have exactly the same width and height, and, thus, have identically-sized bodies. However, the Sony is substantially lighter (40 percent) than the Pentax. 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 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 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 A900«||6.1 in||4.6 in||3.2 in||31.6 oz||880||Y||Sep 2008||2,999||-||Sony A900|
|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 A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499||Sony A9|
|Sony A99 II« »||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199||Sony A99 II|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|Sony A7R« »||5.0 in||3.7 in||1.9 in||16.4 oz||340||Y||Oct 2013||2,299||-||Sony A7R|
|Sony A99« »||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799||-||Sony A99|
|Sony A850« »||6.1 in||4.6 in||3.2 in||31.6 oz||880||Y||Aug 2009||1,999||-||Sony A850|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. 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 A900 was launched at a markedly lower price (by 70 percent) than the 645D, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the imaging sensor is a crucial determinant 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Pentax 645D features a medium format sensor and the Sony A900 a full frame sensor. The sensor area in the A900 is 41 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 1.0. The sensor in the 645D has a native 4:3 aspect ratio, while the one in the A900 offers a 3:2 aspect.
With 39.5MP, the 645D offers a higher resolution than the A900 (24.4MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 5.94μm for the A900) due to its larger sensor. Moreover, the 645D is a somewhat more recent model (by 1 year and 5 months) than the A900, and its sensor might 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 A900 are 30.2 x 20.2 inch or 76.8 x 51.2 cm for good quality, 24.2 x 16.1 inch or 61.4 x 41 cm for very good quality, and 20.2 x 13.4 inch or 51.2 x 34.1 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 Alpha A900 are ISO 200 to ISO 3200, with the possibility to increase the ISO range to 100-6400.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. 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||-||24.6||12.6||1262||82||Pentax 645D|
|Sony A900«||Full Frame||24.4||6048||4032||-||23.7||12.3||1431||79||Sony A900|
|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 A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92||Sony A9|
|Sony A99 II« »||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92||Sony A99 II|
|Sony A7S II« »||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|Sony A7R« »||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95||Sony A7R|
|Sony A99« »||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89||Sony A99|
|Sony A850« »||Full Frame||24.4||6048||4032||-||23.8||12.2||1415||79||Sony A850|
Beyond body and sensor, cameras can and do differ across a range of features. The 645D and the A900 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the A900 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 0.74x), 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 A900, and comparable cameras.
|Pentax 645D»||optical||Y||3.0||921||fixed||n||1/4000s||1.1||n||n||Pentax 645D|
|Sony A900«||optical||Y||3.0||922||fixed||n||1/8000s||5.0||n||Y||Sony A900|
|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 A9« »||3686||n||3.0||1440||tilting||Y||1/8000s||20.0||n||Y||Sony A9|
|Sony A99 II« »||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y||Sony A99 II|
|Sony A7S II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7S II|
|Sony A7R« »||2400||n||3.0||1230||tilting||n||1/8000s||4.0||n||n||Sony A7R|
|Sony A99« »||2359||Y||3.0||1229||full-flex||n||1/8000s||6.0||n||Y||Sony A99|
|Sony A850« »||optical||Y||3.0||922||fixed||n||1/8000s||3.0||n||Y||Sony A850|
One feature that differentiates the A900 and the 645D is in-body image stabilization (IBIS). The A900 reduces the risk of handshake-induced blur with all attached lenses, while the 645D has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.
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 A900 uses Compact Flash or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.
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 Alpha A900 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 A900«||Y||-||-||-||-||mini||2.0||-||-||-||Sony A900|
|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 A9« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A9|
|Sony A99 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A99 II|
|Sony A7S II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|Sony A7R« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R|
|Sony A99« »||Y||stereo||mono||Y||Y||mini||2.0||-||-||-||Sony A99|
|Sony A850« »||Y||-||-||-||-||mini||2.0||-||-||-||Sony A850|
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
Both the 645D and the A900 have been discontinued, but can regularly be found used on eBay. The A900 was replaced by the Sony A99, while the 645D was followed 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.
So what is the bottom line? Is there a clear favorite between the Pentax 645D and the Sony A900? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Pentax 645D:
- More detail: Offers more megapixels (39.5 vs 24.4MP) with a 25% higher linear resolution.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.74x).
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More modern: Is somewhat more recent (announced 1 year and 5 months after the A900).
Arguments in favor of the Sony Alpha A900:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (5 vs 1.1 flaps/sec) to capture the decisive moment.
- Less heavy: Has a lower weight (by 585g or 40 percent) and is thus easier to take along.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More affordable: Was introduced into a lower priced category (70 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in September 2008).
If the count of relative strengths (bullet points above) is taken as a measure, the A900 emerges as the winner of the match-up (8 : 5 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 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 Pentax 645D and the Sony A900 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 says little about, for example, the shooting experience and imaging performance of the 645D and the A900 in practical situations. 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.
This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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 A900«||+ +||+ +||4.5/5||4/5||5/5||Sep 2008||2,999||-||Sony A900|
|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 A9« »||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499||Sony A9|
|Sony A99 II« »||-||85/100||4.5/5||4.5/5||4.5/5||Sep 2016||3,199||Sony A99 II|
|Sony A7S II« »||+||-||4.5/5||5/5||5/5||Sep 2015||2,999||Sony A7S II|
|Sony A7R« »||+ +||82/100||4.5/5||5/5||5/5||Oct 2013||2,299||-||Sony A7R|
|Sony A99« »||-||84/100||4.5/5||o||4.5/5||Sep 2012||2,799||-||Sony A99|
|Sony A850« »||-||75/100||-||4/5||4.5/5||Aug 2009||1,999||-||Sony A850|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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. 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 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 400D vs Sony A900
- Canon G1 X Mark III vs Pentax 645D
- Canon G7 X Mark II vs Pentax 645D
- Canon SX70 vs Pentax 645D
- Fujifilm X-A1 vs Pentax 645D
- Fujifilm XP120 vs Pentax 645D
- Nikon D810 vs Pentax 645D
- Olympus E-P3 vs Sony A900
- Panasonic FZ1000 vs Sony A900
- Panasonic GF2 vs Pentax 645D
- Pentax 645D vs Pentax 645Z
- Pentax 645D vs Sony A6300
Specifications: Pentax 645D vs Sony A900
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 A900|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Pentax 645 mount lenses||Sony A mount lenses|
|Launch Date||March 2010||September 2008|
|Launch Price||USD 9995||USD 2999|
|Sensor Specs||Pentax 645D||Sony A900|
|Sensor Format||Medium Format Sensor||Full Frame Sensor|
|Sensor Size||44.0 x 33.0 mm||35.9 x 24.0 mm|
|Sensor Area||1452 mm2||861.6 mm2|
|Sensor Diagonal||55 mm||43.2 mm|
|Sensor Resolution||39.5 Megapixels||24.4 Megapixels|
|Image Resolution||7264 x 5440 pixels||6048 x 4032 pixels|
|Pixel Pitch||6.06 μm||5.94 μm|
|Pixel Density||2.72 MP/cm2||2.83 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||no Video||no Video|
|ISO Setting||100-1600 ISO||200-3200 ISO|
|ISO Boost||no Enhancement||100-6400 ISO|
|Image Processor||PRIME II||BIONZ|
|DXO Sensor Quality (score)||82||79|
|DXO Color Depth (bits)||24.6||23.7|
|DXO Dynamic Range (EV)||12.6||12.3|
|DXO Low Light (ISO)||1262||1431|
|Screen Specs||Pentax 645D||Sony A900|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||98%||100%|
|Top-Level Screen||Control Panel||Control Panel|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||921k dots||922k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Pentax 645D||Sony A900|
|Autofocus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||1.1 shutter flaps/s||5 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDXC cards||CF or MS cards|
|Second Storage Option||Dual card slots||Dual card slots|
|Connectivity Specs||Pentax 645D||Sony A900|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Pentax 645D||Sony A900|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||800 shots per charge||880 shots per charge|
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
156 x 117 x 82 mm
(6.1 x 4.6 x 3.2 in)
|Camera Weight||1480 g (52.2 oz)||895 g (31.6 oz)|
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