Nikon D7100 vs Pentax 645Z
The Nikon D7100 and the Pentax 645Z are two digital cameras that were officially introduced, respectively, in February 2013 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D7100) and a medium format (645Z) sensor. The Nikon has a resolution of 24 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 D7100||Pentax 645Z|
|Digital single lens reflex||Digital single lens reflex|
|Nikon F mount lenses||Pentax 645 mount lenses|
|24 MP, APS-C Sensor||51.1 MP, Medium Format Sensor|
|1080/60p Video||1080/60i Video|
|ISO 100-6400 (50-25600)||ISO 100-204800|
|Optical viewfinder||Optical viewfinder|
|3.2" LCD, 1229k dots||3.2" LCD, 1037k dots|
|Fixed screen (not touch-sensitive)||Tilting screen (not touch-sensitive)|
|6 shutter flaps per second||3 shutter flaps per second|
|Weathersealed body||Weathersealed body|
|950 shots per battery charge||650 shots per battery charge|
|136 x 107 x 76 mm, 765 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 D7100 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.
Body comparison: Nikon D7100 vs Pentax 645Z
The side-by-side display below illustrates the physical size and weight of the Nikon D7100 and the Pentax 645Z. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.
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 larger (25 percent) than the Nikon D7100. Moreover, the 645Z is substantially heavier (103 percent) than the D7100. 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 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 D7100»||5.4 in||4.2 in||3.0 in||27.0 oz||950||Y||Feb 2013||1,199||-||Nikon D7100|
|Pentax 645Z«||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499||Pentax 645Z|
|Canon 5DS« »||6.0 in||4.6 in||3.0 in||32.8 oz||700||Y||Feb 2015||3,699||Canon 5DS|
|Canon 5DS R« »||6.0 in||4.6 in||3.0 in||32.8 oz||700||Y||Feb 2015||3,699||Canon 5DS R|
|Canon 70D« »||5.5 in||4.1 in||3.1 in||26.6 oz||920||Y||Jul 2013||1,199||-||Canon 70D|
|Hasselblad X1D« »||5.9 in||3.9 in||2.8 in||25.6 oz||..||Y||Jun 2016||8,995||Hasselblad X1D|
|Leica SL« »||5.8 in||4.1 in||1.5 in||29.9 oz||400||Y||Oct 2015||7,450||Leica SL|
|Nikon D7500« »||5.4 in||4.1 in||2.9 in||25.4 oz||950||Y||Apr 2017||1,299||Nikon D7500|
|Nikon D500« »||5.8 in||4.5 in||3.2 in||30.3 oz||1240||Y||Jan 2016||1,999||Nikon D500|
|Nikon D7200« »||5.4 in||4.2 in||3.0 in||27.0 oz||1110||Y||Mar 2015||1,199||-||Nikon D7200|
|Nikon D750« »||5.6 in||4.4 in||3.1 in||26.5 oz||1230||Y||Sep 2014||2,299||Nikon D750|
|Nikon D3300« »||4.9 in||3.9 in||3.0 in||15.2 oz||700||n||Jan 2014||499||-||Nikon D3300|
|Nikon D610« »||5.6 in||4.4 in||3.2 in||30.0 oz||900||Y||Oct 2013||1,999||Nikon D610|
|Nikon D600« »||5.6 in||4.4 in||3.2 in||30.0 oz||900||Y||Sep 2012||2,099||-||Nikon D600|
|Nikon D7000« »||5.2 in||4.1 in||3.0 in||27.5 oz||1050||Y||Sep 2010||1,499||-||Nikon D7000|
|Pentax 645D« »||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995||-||Pentax 645D|
|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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D7100 was launched at a markedly lower price (by 86 percent) than the 645Z, 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.
Sensor comparison: Nikon D7100 vs Pentax 645Z
The size of the imaging sensor is a crucial determinant 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Nikon D7100 features an APS-C sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 292 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 D7100 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.
With 51.1MP, the 645Z offers a higher resolution than the D7100 (24MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 3.91μm for the D7100) due to its larger sensor. Moreover, the 645Z is a somewhat more recent model (by 1 year and 1 month) than the D7100, 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 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 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 inch or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inch or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inch or 69.9 x 52.4 cm. The corresponding values for the Nikon D7100 are 30 x 20 inch or 76.2 x 50.8 cm for good quality, 24 x 16 inch or 61 x 40.6 cm for very good quality, and 20 x 13.3 inch or 50.8 x 33.9 cm for excellent quality prints.
The Nikon D7100 has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 50-25600. 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 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 consideration, the 645Z offers substantially better image quality than the D7100 (overall score 18 points higher). The advantage is based on 1.8 bits higher color depth, 1 EV in additional dynamic range, and 1.8 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 D7100»||APS-C||24.0||6000||4000||1080/60p||24.2||13.7||1256||83||Nikon D7100|
|Pentax 645Z«||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101||Pentax 645Z|
|Canon 5DS« »||Full Frame||50.3||8688||5792||1080/30p||24.7||12.4||2381||87||Canon 5DS|
|Canon 5DS R« »||Full Frame||50.3||8688||5792||1080/30p||24.6||12.4||2308||86||Canon 5DS R|
|Canon 70D« »||APS-C||20.0||5472||3648||1080/30p||22.5||11.6||926||68||Canon 70D|
|Hasselblad X1D« »||Medium Format||51.3||8272||6200||1080/25p||26.2||14.8||4489||102||Hasselblad X1D|
|Leica SL« »||Full Frame||24.0||6000||4000||4K/30p||25.0||13.4||1821||88||Leica SL|
|Nikon D7500« »||APS-C||20.7||5568||3712||4K/30p||24.3||14.0||1483||86||Nikon D7500|
|Nikon D500« »||APS-C||20.7||5568||3712||4K/30p||24.0||14.0||1324||83||Nikon D500|
|Nikon D7200« »||APS-C||24.0||6000||4000||1080/60p||24.5||14.6||1333||87||Nikon D7200|
|Nikon D750« »||Full Frame||24.2||6016||4016||1080/60p||24.8||14.5||2956||93||Nikon D750|
|Nikon D3300« »||APS-C||24.0||6000||4000||1080/60p||24.3||12.8||1385||82||Nikon D3300|
|Nikon D610« »||Full Frame||24.2||6016||4016||1080/30p||25.1||14.4||2925||94||Nikon D610|
|Nikon D600« »||Full Frame||24.2||6016||4016||1080/30p||25.1||14.2||2980||94||Nikon D600|
|Nikon D7000« »||APS-C||16.1||4928||3264||10800/24p||23.5||13.9||1167||80||Nikon D7000|
|Pentax 645D« »||Medium Format||39.5||7264||5440||-||24.6||12.6||1262||82||Pentax 645D|
|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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the D7100 provides a higher frame rate than the 645Z. It can shoot video footage at 1080/60p, while the Pentax is limited to 1080/60i.
Feature comparison: Nikon D7100 vs Pentax 645Z
Apart from body and sensor, cameras can and do differ across a range of features. The D7100 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 D7100 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 0.63x), 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 Nikon D7100, the Pentax 645Z, and comparable cameras.
|Nikon D7100»||optical||Y||3.2||1229||fixed||n||1/8000s||6.0||Y||n||Nikon D7100|
|Pentax 645Z«||optical||Y||3.2||1037||tilting||n||1/4000s||3.0||n||n||Pentax 645Z|
|Canon 5DS« »||optical||Y||3.2||1040||fixed||n||1/8000s||5.0||n||n||Canon 5DS|
|Canon 5DS R« »||optical||Y||3.2||1040||fixed||n||1/8000s||5.0||n||n||Canon 5DS R|
|Canon 70D« »||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 70D|
|Hasselblad X1D« »||2360||n||3.0||920||fixed||Y||1/2000s||2.3||n||n||Hasselblad X1D|
|Leica SL« »||4400||Y||3.0||1040||fixed||Y||1/8000s||11.0||n||n||Leica SL|
|Nikon D7500« »||optical||Y||3.2||922||tilting||Y||1/8000s||8.0||Y||n||Nikon D7500|
|Nikon D500« »||optical||Y||3.2||2359||tilting||Y||1/8000s||10.0||n||n||Nikon D500|
|Nikon D7200« »||optical||Y||3.2||1229||fixed||n||1/8000s||6.0||Y||n||Nikon D7200|
|Nikon D750« »||optical||Y||3.2||1229||tilting||n||1/4000s||6.0||Y||n||Nikon D750|
|Nikon D3300« »||optical||n||3.0||921||fixed||n||1/4000s||5.0||Y||n||Nikon D3300|
|Nikon D610« »||optical||Y||3.2||921||fixed||n||1/4000s||6.0||Y||n||Nikon D610|
|Nikon D600« »||optical||Y||3.0||921||fixed||n||1/4000s||5.5||Y||n||Nikon D600|
|Nikon D7000« »||optical||Y||3.0||921||fixed||n||1/8000s||6.0||Y||n||Nikon D7000|
|Pentax 645D« »||optical||Y||3.0||921||fixed||n||1/4000s||1.1||n||n||Pentax 645D|
|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 D7100 has one, while the 645Z does not. While the built-in flash of the D7100 is not very powerful, it can at times be useful as a fill-in light.
The Nikon D7100 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.
Concerning the storage of imaging data, both the D7100 and the 645Z write their files to SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
Connectivity comparison: Nikon D7100 vs Pentax 645Z
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 D7100 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Nikon D7100»||Y||stereo||mono||Y||Y||mini||2.0||-||-||-||Nikon D7100|
|Pentax 645Z«||Y||stereo||mono||Y||-||mini||3.0||-||-||-||Pentax 645Z|
|Canon 5DS« »||Y||mono||mono||Y||-||mini||3.0||-||-||-||Canon 5DS|
|Canon 5DS R« »||Y||mono||mono||Y||-||mini||3.0||-||-||-||Canon 5DS R|
|Canon 70D« »||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Canon 70D|
|Hasselblad X1D« »||Y||stereo||mono||Y||Y||mini||3.0||Y||-||-||Hasselblad X1D|
|Leica SL« »||Y||stereo||mono||Y||Y||full||3.0||Y||-||-||Leica SL|
|Nikon D7500« »||Y||stereo||mono||Y||Y||mini||2.0||Y||-||Y||Nikon D7500|
|Nikon D500« »||Y||stereo||mono||Y||Y||mini||3.0||Y||Y||Y||Nikon D500|
|Nikon D7200« »||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-||Nikon D7200|
|Nikon D750« »||Y||stereo||mono||Y||Y||mini||2.0||Y||-||-||Nikon D750|
|Nikon D3300« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D3300|
|Nikon D610« »||Y||mono||mono||Y||Y||mini||2.0||-||-||-||Nikon D610|
|Nikon D600« »||Y||mono||mono||Y||Y||mini||2.0||-||-||-||Nikon D600|
|Nikon D7000« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D7000|
|Pentax 645D« »||Y||stereo||-||-||-||-||2.0||-||-||-||Pentax 645D|
|Sony RX10« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10|
It is notable that the D7100 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.
Studio photographers will appreciate that the Pentax 645Z (unlike the D7100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The 645Z is a recent model that features in the current product line-up of Pentax. In contrast, the D7100 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the D7100 was succeeded by the Nikon D7200. 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.
Review summary: Nikon D7100 vs Pentax 645Z
So what conclusions can be drawn? Which of the two cameras – the Nikon D7100 or the Pentax 645Z – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Nikon D7100:
- Better video: Provides higher movie framerates (1080/60p versus 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 (1229k vs 1037k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (6 vs 3 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (136x107mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 785g or 51 percent) and hence easier to carry around.
- Longer lasting: Can take more shots (950 versus 650) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (86 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in February 2013).
Arguments in favor of the Pentax 645Z:
- More detail: Has more megapixels (51.1 vs 24MP), which boosts linear resolution by 43%.
- Better image quality: Scores substantially higher (18 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.8 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1.8 stops ISO advantage).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.63x).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More modern: Was introduced somewhat (1 year and 1 month) more recently.
If the number of relative strengths (bullet points above) is taken as a guide, the D7100 emerges as the winner of the contest (12 : 10 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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 D7100 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the D7100 or the 645Z. 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.
Expert reviews: Nikon D7100 vs Pentax 645Z
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 D7100»||+ +||85/100||4.5/5||5/5||4.5/5||Feb 2013||1,199||-||Nikon D7100|
|Pentax 645Z«||-||-||4.5/5||5/5||5/5||Apr 2014||8,499||Pentax 645Z|
|Canon 5DS« »||+||83/100||4.5/5||5/5||4.5/5||Feb 2015||3,699||Canon 5DS|
|Canon 5DS R« »||+||83/100||5/5||5/5||4.5/5||Feb 2015||3,699||Canon 5DS R|
|Canon 70D« »||+ +||83/100||4.5/5||4.5/5||5/5||Jul 2013||1,199||-||Canon 70D|
|Hasselblad X1D« »||o||81/100||-||-||4/5||Jun 2016||8,995||Hasselblad X1D|
|Leica SL« »||-||84/100||4.5/5||4/5||4/5||Oct 2015||7,450||Leica SL|
|Nikon D7500« »||+ +||86/100||5/5||4.5/5||4.5/5||Apr 2017||1,299||Nikon D7500|
|Nikon D500« »||+ +||91/100||4.5/5||5/5||5/5||Jan 2016||1,999||Nikon D500|
|Nikon D7200« »||+ +||84/100||4.5/5||4/5||4.5/5||Mar 2015||1,199||-||Nikon D7200|
|Nikon D750« »||+ +||90/100||4.5/5||5/5||4.5/5||Sep 2014||2,299||Nikon D750|
|Nikon D3300« »||+||77/100||4.5/5||4.5/5||4.5/5||Jan 2014||499||-||Nikon D3300|
|Nikon D610« »||+ +||87/100||4.5/5||4.5/5||4.5/5||Oct 2013||1,999||Nikon D610|
|Nikon D600« »||+ +||87/100||5/5||4.5/5||4.5/5||Sep 2012||2,099||-||Nikon D600|
|Nikon D7000« »||-||80/100||4.5/5||5/5||4.5/5||Sep 2010||1,499||-||Nikon D7000|
|Pentax 645D« »||-||-||-||4.5/5||-||Mar 2010||9,995||-||Pentax 645D|
|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.|
Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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 a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 1D Mark II vs Pentax 645Z
- Canon 1D X vs Nikon D7100
- Canon 5DS vs Pentax 645Z
- Canon 77D vs Nikon D7100
- Canon XSi vs Pentax 645Z
- Fujifilm X-T2 vs Nikon D7100
- Fujifilm X-T2 vs Pentax 645Z
- Nikon D3400 vs Nikon D7100
- Nikon D7100 vs Olympus E-M1
- Nikon D7100 vs Olympus E-PL8
- Panasonic G7 vs Pentax 645Z
- Panasonic S1R vs Pentax 645Z
Specifications: Nikon D7100 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 D7100||Pentax 645Z|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Nikon F mount lenses||Pentax 645 mount lenses|
|Launch Date||February 2013||April 2014|
|Launch Price||USD 1199||USD 8499|
|Sensor Specs||Nikon D7100||Pentax 645Z|
|Sensor Format||APS-C Sensor||Medium Format Sensor|
|Sensor Size||23.5 x 15.6 mm||43.8 x 32.8 mm|
|Sensor Area||366.6 mm2||1436.64 mm2|
|Sensor Diagonal||28.2 mm||54.7 mm|
|Sensor Resolution||24 Megapixels||51.1 Megapixels|
|Image Resolution||6000 x 4000 pixels||8256 x 6192 pixels|
|Pixel Pitch||3.91 μm||5.30 μm|
|Pixel Density||6.55 MP/cm2||3.56 MP/cm2|
|Moiré control||no AA filter||no AA filter|
|Movie Capability||1080/60p Video||1080/60i Video|
|ISO Setting||100-6400 ISO||100-204800 ISO|
|ISO Boost||50-25600 ISO||no Enhancement|
|Image Processor||EXPEED 4||PRIME III|
|DXO Sensor Quality (score)||83||101|
|DXO Color Depth (bits)||24.2||26.0|
|DXO Dynamic Range (EV)||13.7||14.7|
|DXO Low Light (ISO)||1256||4505|
|Screen Specs||Nikon D7100||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||3.2 inch||3.2 inch|
|LCD Resolution||1229k dots||1037k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Shooting Specs||Nikon D7100||Pentax 645Z|
|Autofocus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000/s||1/4000/s|
|Continuous Shooting||6 shutter flaps/s||3 shutter flaps/s|
|Shutter Life Expectancy||150 000 actuations||100 000 actuations|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Dual card slots||Dual card slots|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Nikon D7100||Pentax 645Z|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 3.0|
|HDMI Port||mini HDMI||mini HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||Headphone port||Headphone port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Nikon D7100||Pentax 645Z|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Type||EN-EL15 power pack||D-LI90 power pack|
|Battery Life (CIPA)||950 shots per charge||650 shots per charge|
136 x 107 x 76 mm
(5.4 x 4.2 x 3.0 in)
156 x 117 x 123 mm
(6.1 x 4.6 x 4.8 in)
|Camera Weight||765 g (27.0 oz)||1550 g (54.7 oz)|
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