Nikon D5 vs Pentax 645Z
The Nikon D5 and the Pentax 645Z are two professional cameras that were officially introduced, respectively, in January 2016 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D5) and a medium format (645Z) sensor. The Nikon has a resolution of 20.7 megapixels, whereas the Pentax provides 51.1 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Nikon D5||Pentax 645Z|
|Digital single lens reflex||Digital single lens reflex|
|Nikon F mount lenses||Pentax 645 mount lenses|
|20.7 MP, Full Frame Sensor||51.1 MP, Medium Format Sensor|
|4K/30p Video||1080/60i Video|
|ISO 100-102,400 (50 - 3,280,000)||ISO 100-204,800|
|Optical viewfinder||Optical viewfinder|
|3.2 LCD, 2359k dots||3.2 LCD, 1037k dots|
|Fixed touchscreen||Tilting screen (not touch-sensitive)|
|14 shutter flaps per second||3 shutter flaps per second|
|Weathersealed body||Weathersealed body|
|3780 shots per battery charge||650 shots per battery charge|
|160 x 159 x 92 mm, 1415 g||156 x 117 x 123 mm, 1550 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D5 and the Pentax 645Z? 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.
The physical size and weight of the Nikon D5 and the Pentax 645Z are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. 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 Pentax 645Z is notably smaller (28 percent) than the Nikon D5. However, the 645Z is markedly heavier (10 percent) than the D5. 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.
Concerning battery life, the D5 gets 3780 shots out of its EN-EL18a battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack. As can be seen in the images above, the D5 has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power.
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.
|Nikon D5||6.3 in||6.3 in||3.6 in||49.9 oz||3780||Y||Jan 2016||6,499|
|Pentax 645Z||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499|
|Canon 1D X Mark II||6.2 in||6.6 in||3.3 in||54.0 oz||1210||Y||Feb 2016||5,999|
|Canon 5DS||6.0 in||4.6 in||3.0 in||32.8 oz||700||Y||Feb 2015||3,699|
|Canon 5DS R||6.0 in||4.6 in||3.0 in||32.8 oz||700||Y||Feb 2015||3,699|
|Hasselblad X1D||5.9 in||3.9 in||2.8 in||25.6 oz||..||Y||Jun 2016||8,995|
|Leica SL||5.8 in||4.1 in||1.5 in||29.9 oz||400||Y||Oct 2015||7,450|
|Nikon D6||6.3 in||6.4 in||3.6 in||44.8 oz||3580||Y||Feb 2020||6,499|
|Nikon D850||5.7 in||4.9 in||3.1 in||35.5 oz||1840||Y||Jul 2017||3,299|
|Nikon D4S||6.3 in||6.2 in||3.6 in||47.6 oz||3020||Y||Feb 2014||6,499|
|Nikon D750||5.6 in||4.4 in||3.1 in||26.5 oz||1230||Y||Sep 2014||2,299|
|Nikon D610||5.6 in||4.4 in||3.2 in||30.0 oz||900||Y||Oct 2013||1,999|
|Nikon D4||6.3 in||6.2 in||3.6 in||47.3 oz||2600||Y||Jan 2012||5,999|
|Nikon D600||5.6 in||4.4 in||3.2 in||30.0 oz||900||Y||Sep 2012||2,099|
|Nikon D3S||6.3 in||6.2 in||3.5 in||43.7 oz||4200||Y||Oct 2009||5,199|
|Nikon D3X||6.3 in||6.2 in||3.5 in||44.4 oz||4400||Y||Dec 2008||7,999|
|Pentax 645D||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995|
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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The D5 was launched at a somewhat lower price (by 24 percent) than the 645Z, which makes it more attractive for photographers on a tight budget. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 Nikon D5 features a full frame sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 67 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 0.79. The sensor in the D5 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.
With 51.1MP, the 645Z offers a higher resolution than the D5 (20.7MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 6.44μm for the D5). It is noteworthy in this context that the D5 is a somewhat more recent model (by 1 year and 8 months) than the 645Z, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Pentax 645Z implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645Z for good quality output (200 dots per inch) amounts to 41.3 x 31 inches or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inches or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inches or 69.9 x 52.4 cm. The corresponding values for the Nikon D5 are 27.9 x 18.6 inches or 71 x 47.1 cm for good quality, 22.4 x 14.8 inches or 56.8 x 37.7 cm for very good quality, and 18.6 x 12.4 inches or 47.3 x 31.4 cm for excellent quality prints.
The Nikon D5 has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 50-3280000. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. Of the two cameras under consideration, the 645Z offers substantially better image quality than the D5 (overall score 13 points higher). The advantage is based on 0.9 bits higher color depth, 2.4 EV in additional dynamic range, and 0.9 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Nikon D5||Full Frame||20.7||5588||3712||4K/30p||25.1||12.3||2343||88|
|Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
|Canon 1D X Mark II||Full Frame||20.0||5472||3648||4K/60p||24.1||13.5||3207||88|
|Canon 5DS||Full Frame||50.3||8688||5792||1080/30p||24.7||12.4||2381||87|
|Canon 5DS R||Full Frame||50.3||8688||5792||1080/30p||24.6||12.4||2308||86|
|Hasselblad X1D||Medium Format||51.3||8272||6200||1080/25p||26.2||14.8||4489||102|
|Leica SL||Full Frame||24.0||6000||4000||4K/30p||25.0||13.4||1821||88|
|Nikon D6||Full Frame||20.7||5568||3712||4K/30p||..||..||..||..|
|Nikon D850||Full Frame||45.4||8256||5504||4K/30p||26.4||14.8||2660||100|
|Nikon D4S||Full Frame||16.2||4928||3280||1080/60p||24.4||13.3||3074||89|
|Nikon D750||Full Frame||24.2||6016||4016||1080/60p||24.8||14.5||2956||93|
|Nikon D610||Full Frame||24.2||6016||4016||1080/30p||25.1||14.4||2925||94|
|Nikon D4||Full Frame||16.2||4928||3280||1080/30p||24.7||13.1||2965||89|
|Nikon D600||Full Frame||24.2||6016||4016||1080/30p||25.1||14.2||2980||94|
|Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82|
|Nikon D3X||Full Frame||24.4||6048||4032||none||24.7||13.7||1992||88|
|Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the D5 provides a higher video resolution than the 645Z. It can shoot video footage at 4K/30p, while the Pentax is limited to 1080/60i.
Apart from body and sensor, cameras can and do differ across a variety of features. The D5 and the 645Z 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 D5 offers a wider field of view (100%) than the one in the 645Z (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.72x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D5 and Pentax 645Z along with similar information for a selection of comparators.
|Canon 1D X Mark II||optical||Y||3.2||1620||fixed||Y||1/8000s||16.0||n||n|
|Canon 5DS R||optical||Y||3.2||1040||fixed||n||1/8000s||5.0||n||n|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The D5 has a touchscreen, while the 645Z has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The Nikon D5 and the Pentax 645Z both have 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 D5 writes its imaging data to Compact Flash or XQD cards, while the 645Z uses SDXC 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 Nikon D5 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Canon 1D X Mark II||Y||mono||mono||Y||Y||mini||3.0||-||-||-|
|Canon 5DS R||Y||mono||mono||Y||-||mini||3.0||-||-||-|
It is notable that the D5 has a headphone jack, which is not present on the 645Z This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
The 645Z is a recent model that features in the current product line-up of Pentax. In contrast, the D5 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the D5 was succeeded by the Nikon D6. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Pentax websites.
So what is the bottom line? Which of the two cameras – the Nikon D5 or the Pentax 645Z – 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 Nikon D5:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
- More detailed LCD: Has a higher resolution rear screen (2359k vs 1037k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (14 vs 3 flaps/sec) to capture the decisive moment.
- More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
- Longer lasting: Can take more shots (3780 versus 650) on a single battery charge.
- More affordable: Was introduced into a lower priced segment (24 percent cheaper at launch).
- More modern: Is somewhat more recent (announced 1 year and 8 months after the 645Z).
Advantages of the Pentax 645Z:
- More detail: Has more megapixels (51.1 vs 20.7MP), which boosts linear resolution by 54%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (13 points) in the DXO overall evaluation.
- More dynamic range: Captures a broader range of light and dark details (2.4 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.9 stops ISO advantage).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.72x).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- More compact: Is smaller (156x117mm vs 160x159mm) and will fit more readily into a bag.
- More heavily discounted: Has been on the market for longer (launched in April 2014).
If the count of individual advantages (bullet points above) is taken as a guide, the D5 emerges as the winner of the contest (12 : 9 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Nikon D5 and the Pentax 645Z 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 D5 and the 645Z 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.
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.
|Nikon D5||..||89/100||4.5/5||5/5||5/5||Jan 2016||6,499|
|Pentax 645Z||..||..||4.5/5||5/5||5/5||Apr 2014||8,499|
|Canon 1D X Mark II||..||89/100||4.5/5||5/5||4.5/5||Feb 2016||5,999|
|Canon 5DS||+||83/100||4.5/5||5/5||4.5/5||Feb 2015||3,699|
|Canon 5DS R||+||83/100||5/5||5/5||4.5/5||Feb 2015||3,699|
|Hasselblad X1D||o||81/100||..||..||4/5||Jun 2016||8,995|
|Leica SL||..||84/100||4.5/5||4/5||4/5||Oct 2015||7,450|
|Nikon D6||..||..||4.5/5||..||4.5/5||Feb 2020||6,499|
|Nikon D850||+ +||89/100||4.5/5||5/5||5/5||Jul 2017||3,299|
|Nikon D4S||..||..||4.5/5||5/5||4.5/5||Feb 2014||6,499|
|Nikon D750||+ +||90/100||4.5/5||5/5||4.5/5||Sep 2014||2,299|
|Nikon D610||+ +||87/100||4.5/5||4.5/5||4.5/5||Oct 2013||1,999|
|Nikon D4||..||..||4.5/5||..||4.5/5||Jan 2012||5,999|
|Nikon D600||+ +||87/100||5/5||4.5/5||4.5/5||Sep 2012||2,099|
|Nikon D3S||..||89/100||4.5/5||5/5||5/5||Oct 2009||5,199|
|Nikon D3X||..||86/100||4/5||5/5||5/5||Dec 2008||7,999|
|Pentax 645D||..||..||..||4.5/5||..||Mar 2010||9,995|
|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? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
Specifications: Nikon D5 vs Pentax 645Z
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||Nikon D5||Pentax 645Z|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Nikon F mount lenses||Pentax 645 mount lenses|
|Launch Date||January 2016||April 2014|
|Launch Price||USD 6,499||USD 8,499|
|Sensor Specs||Nikon D5||Pentax 645Z|
|Sensor Format||Full Frame Sensor||Medium Format Sensor|
|Sensor Size||35.9 x 23.9 mm||43.8 x 32.8 mm|
|Sensor Area||858.01 mm2||1436.64 mm2|
|Sensor Diagonal||43.1 mm||54.7 mm|
|Sensor Resolution||20.7 Megapixels||51.1 Megapixels|
|Image Resolution||5588 x 3712 pixels||8256 x 6192 pixels|
|Pixel Pitch||6.44 μm||5.30 μm|
|Pixel Density||2.42 MP/cm2||3.56 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||4K/30p Video||1080/60i Video|
|ISO Setting||100 - 102,400 ISO||100 - 204,800 ISO|
|ISO Boost||50 - 3,280,000 ISO||no Enhancement|
|Image Processor||EXPEED 5||PRIME III|
|DXO Sensor Quality (score)||88||101|
|DXO Color Depth (bits)||25.1||26.0|
|DXO Dynamic Range (EV)||12.3||14.7|
|DXO Low Light (ISO)||2343||4505|
|Screen Specs||Nikon D5||Pentax 645Z|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%||98%|
|Top-Level Screen||Control Panel||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.2inch||3.2inch|
|LCD Resolution||2359k dots||1037k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Nikon D5||Pentax 645Z|
|Focus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/4000s|
|Continuous Shooting||14 shutter flaps/s||3 shutter flaps/s|
|Shutter Life Expectancy||400 000 actuations||100 000 actuations|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||CF or XQD cards||SDXC cards|
|Second Storage Option||Dual card slots||Dual card slots|
|Connectivity Specs||Nikon D5||Pentax 645Z|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||USB 3.0||USB 3.0|
|HDMI Port||mini HDMI||mini HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||Headphone port||no Headphone port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Nikon D5||Pentax 645Z|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||3780 shots per charge||650 shots per charge|
160 x 159 x 92 mm
(6.3 x 6.3 x 3.6 in)
156 x 117 x 123 mm
(6.1 x 4.6 x 4.8 in)
|Camera Weight||1415 g (49.9 oz)||1550 g (54.7 oz)|
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