Nikon D3000 vs Pentax 645Z
The Nikon D3000 and the Pentax 645Z are two digital cameras that were revealed to the public, respectively, in July 2009 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D3000) and a medium format (645Z) sensor. The Nikon has a resolution of 10 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 D3000||Pentax 645Z|
|Digital single lens reflex||Digital single lens reflex|
|Nikon F mount lenses||Pentax 645 mount lenses|
|10 MP, APS-C Sensor||51.1 MP, Medium Format Sensor|
|no Video||1080/60i Video|
|ISO 100-1,600 (100 - 3,200)||ISO 100-204,800|
|Optical viewfinder||Optical viewfinder|
|3.0 LCD, 230k dots||3.2 LCD, 1037k dots|
|Fixed screen (not touch-sensitive)||Tilting screen (not touch-sensitive)|
|3 shutter flaps per second||3 shutter flaps per second|
|not weather sealed||Weathersealed body|
|500 shots per battery charge||650 shots per battery charge|
|126 x 97 x 64 mm, 536 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 D3000 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.
An illustration of the physical size and weight of the Nikon D3000 and the Pentax 645Z is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645Z is considerably larger (49 percent) than the Nikon D3000. Moreover, the 645Z is substantially heavier (189 percent) than the D3000. It is noteworthy in this context that the 645Z is splash and dust-proof, while the D3000 does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
The 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.
|Nikon D3000||5.0 in||3.8 in||2.5 in||18.9 oz||500||n||Jul 2009||599|
|Pentax 645Z||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499|
|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|
|Fujifilm X100||5.0 in||3.0 in||2.1 in||15.7 oz||300||n||Sep 2010||1,199|
|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 D3200||4.9 in||3.8 in||3.0 in||17.8 oz||540||n||Apr 2012||599|
|Nikon D3100||4.9 in||3.8 in||3.0 in||17.8 oz||550||n||Aug 2010||599|
|Nikon D5000||5.0 in||4.1 in||3.1 in||20.8 oz||510||n||Apr 2009||749|
|Nikon D60||5.0 in||3.7 in||2.5 in||18.4 oz||500||n||Jan 2008||629|
|Nikon D90||5.2 in||4.1 in||3.0 in||24.8 oz||850||n||Aug 2008||1,299|
|Nikon D40X||4.9 in||3.7 in||2.5 in||18.4 oz||520||n||Mar 2007||729|
|Nikon D40||4.9 in||3.7 in||2.5 in||18.4 oz||470||n||Nov 2006||499|
|Olympus E-450||5.1 in||3.6 in||2.1 in||15.5 oz||500||n||Mar 2009||499|
|Olympus E-420||5.1 in||3.6 in||2.1 in||15.5 oz||500||n||Mar 2008||599|
|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.
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 D3000 was launched at a markedly lower price (by 93 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.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 Nikon D3000 features an APS-C sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 285 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 D3000 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 D3000 (10MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 6.11μm for the D3000). Yet, the 645Z is a much more recent model (by 4 years and 8 months) than the D3000, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that 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 D3000 are 19.4 x 13 inches or 49.2 x 32.9 cm for good quality, 15.5 x 10.4 inches or 39.3 x 26.3 cm for very good quality, and 12.9 x 8.6 inches or 32.8 x 21.9 cm for excellent quality prints.
The Nikon D3000 has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).
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"). Of the two cameras under consideration, the 645Z offers substantially better image quality than the D3000 (overall score 39 points higher). The advantage is based on 3.7 bits higher color depth, 3.6 EV in additional dynamic range, and 3 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 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
|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|
|Olympus E-450||Four Thirds||10.0||3648||2736||none||21.5||10.5||512||56|
|Olympus E-420||Four Thirds||10.0||3648||2736||none||21.5||10.4||527||56|
|Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
Many modern cameras cannot only take still pictures, but also record videos. The 645Z indeed provides for movie recording, while the D3000 does not. The highest resolution format that the 645Z can use is 1080/60i.
Beyond body and sensor, cameras can and do differ across a range of features. The D3000 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 645Z offers a wider field of view (98%) than the one in the D3000 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.53x), 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 D3000, the Pentax 645Z, and comparable cameras.
|Canon 5DS R||optical||Y||3.2||1040||fixed||n||1/8000s||5.0||n||n|
One difference between the cameras concerns the presence of an on-board flash. The D3000 has one, while the 645Z does not. While the built-in flash of the D3000 is not very powerful, it can at times be useful as a fill-in light.
The Pentax 645Z 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 D3000 writes its imaging data to SDHC cards, while the 645Z uses SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the D3000 only has one slot. The 645Z supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D3000 cannot take advantage of Ultra High Speed SD cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Nikon D3000 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Canon 5DS R||Y||mono||mono||Y||-||mini||3.0||-||-||-|
Studio photographers will appreciate that the Pentax 645Z (unlike the D3000) 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 D3000 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the D3000 was succeeded by the Nikon D3100. 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? Is the Nikon D3000 better than the Pentax 645Z or vice versa? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Nikon D3000:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More compact: Is smaller (126x97mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 1014g or 65 percent) and hence easier to carry around.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (93 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in July 2009).
Arguments in favor of the Pentax 645Z:
- More detail: Has more megapixels (51.1 vs 10MP), which boosts linear resolution by 122%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (39 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (3.7 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (3.6 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (3 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/60i video.
- More complete view: Has a viewfinder with a larger field of view (98% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.53x).
- Easier setting verification: Features a control panel on top to check shooting parameters.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1037k vs 230k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Gets more shots (650 versus 500) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- 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.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 4 years and 8 months of technical progress since the D3000 launch.
If the count of relative strengths (bullet points above) is taken as a measure, the 645Z is the clear winner of the contest (21 : 6 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 Nikon D3000 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 D3000 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 D3000||+||72/100||4/5||3.5/5||4.5/5||Jul 2009||599|
|Pentax 645Z||..||..||4.5/5||5/5||5/5||Apr 2014||8,499|
|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|
|Fujifilm X100||..||75/100||4/5||4/5||5/5||Sep 2010||1,199|
|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 D3200||+ +||73/100||4.5/5||4.5/5||4.5/5||Apr 2012||599|
|Nikon D3100||+ +||72/100||4.5/5||5/5||4.5/5||Aug 2010||599|
|Nikon D5000||+ +||75/100||4/5||5/5||4.5/5||Apr 2009||749|
|Nikon D60||80/100||+ +||4/5||o||4.5/5||Jan 2008||629|
|Nikon D90||+ +||+ +||4/5||5/5||4.5/5||Aug 2008||1,299|
|Nikon D40X||79/100||+ +||4/5||o||4/5||Mar 2007||729|
|Nikon D40||81/100||+ +||o||5/5||4.5/5||Nov 2006||499|
|Olympus E-450||..||..||4/5||..||4/5||Mar 2009||499|
|Olympus E-420||85/100||+ +||4/5||o||4.5/5||Mar 2008||599|
|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? 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 1D Mark II vs Pentax 645Z
- Canon G12 vs Nikon D3000
- Canon G7 X Mark II vs Nikon D3000
- Canon M100 vs Pentax 645Z
- Fujifilm X-E1 vs Nikon D3000
- Fujifilm X-T100 vs Nikon D3000
- Kodak S-1 vs Nikon D3000
- Leica D-LUX 5 vs Pentax 645Z
- Nikon D3000 vs Olympus E-620
- Olympus E-PL1 vs Pentax 645Z
- Panasonic GX1 vs Pentax 645Z
- Pentax 645Z vs Sony NEX-5
Specifications: Nikon D3000 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 D3000||Pentax 645Z|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Nikon F mount lenses||Pentax 645 mount lenses|
|Launch Date||July 2009||April 2014|
|Launch Price||USD 599||USD 8,499|
|Sensor Specs||Nikon D3000||Pentax 645Z|
|Sensor Format||APS-C Sensor||Medium Format Sensor|
|Sensor Size||23.6 x 15.8 mm||43.8 x 32.8 mm|
|Sensor Area||372.88 mm2||1436.64 mm2|
|Sensor Diagonal||28.4 mm||54.7 mm|
|Sensor Resolution||10 Megapixels||51.1 Megapixels|
|Image Resolution||3872 x 2592 pixels||8256 x 6192 pixels|
|Pixel Pitch||6.11 μm||5.30 μm|
|Pixel Density||2.69 MP/cm2||3.56 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||1080/60i Video|
|ISO Setting||100 - 1,600 ISO||100 - 204,800 ISO|
|ISO Boost||100 - 3,200 ISO||no Enhancement|
|Image Processor||EXPEED||PRIME III|
|DXO Sensor Quality (score)||62||101|
|DXO Color Depth (bits)||22.3||26.0|
|DXO Dynamic Range (EV)||11.1||14.7|
|DXO Low Light (ISO)||563||4505|
|Screen Specs||Nikon D3000||Pentax 645Z|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||98%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||3.2inch|
|LCD Resolution||230k dots||1037k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Shooting Specs||Nikon D3000||Pentax 645Z|
|Focus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||3 shutter flaps/s||3 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||100 000 actuations|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDHC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||no||UHS-I|
|Connectivity Specs||Nikon D3000||Pentax 645Z|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 3.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Nikon D3000||Pentax 645Z|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||500 shots per charge||650 shots per charge|
126 x 97 x 64 mm
(5.0 x 3.8 x 2.5 in)
156 x 117 x 123 mm
(6.1 x 4.6 x 4.8 in)
|Camera Weight||536 g (18.9 oz)||1550 g (54.7 oz)|
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