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Nikon D5000 vs Pentax 645Z

The Nikon D5000 and the Pentax 645Z are two digital cameras that were revealed to the public, respectively, in April 2009 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D5000) and a medium format (645Z) sensor. The Nikon has a resolution of 12.2 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.

Headline Specifications
Nikon D5000
versus
Pentax 645Z
Nikon D5000   Pentax 645Z
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
12.2 MP – APS-C sensor 51.1 MP – Medium Format sensor
720/24p Video 1080/60i Video
ISO 200-3,200 (200 - 6,400) ISO 100-204,800
Optical viewfinder Optical viewfinder
2.7" LCD – 230k dots 3.2" LCD – 1037k dots
Fully flexible screen (no touchscreen) Tilting screen (no touchscreen)
4 shutter flaps per second 3 shutter flaps per second
not weather sealedWeathersealed body
510 shots per battery charge650 shots per battery charge
127 x 104 x 80 mm, 590 g 156 x 117 x 123 mm, 1550 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D5000 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.

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Body comparison

The physical size and weight of the Nikon D5000 and the Pentax 645Z are illustrated in the side-by-side display below. 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 measures are rounded to the nearest millimeter.

Size Nikon D5000 vs Pentax 645Z
Compare D5000 versus 645Z top
Comparison D5000 or 645Z rear

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 (38 percent) than the Nikon D5000. Moreover, the 645Z is substantially heavier (163 percent) than the D5000. It is noteworthy in this context that the 645Z is splash and dust-proof, while the D5000 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.

Concerning battery life, the D5000 gets 510 shots out of its Nikon EN-EL9a battery, while the 645Z can take 650 images on a single charge of its Pentax D-LI90 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D5000 127 mm 104 mm 80 mm 590 g 510 n Apr 2009 749ebay.com
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499ebay.com
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
5.
 
Canon XSi 129 mm 98 mm 62 mm 524 g 500 n Jan 2008 799ebay.com
6.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995ebay.com
7.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450ebay.com
8.
 
Nikon D5600 124 mm 97 mm 70 mm 465 g 970 n Nov 2016 699ebay.com
9.
 
Nikon D5200 129 mm 98 mm 78 mm 555 g 500 n Nov 2012 749ebay.com
10.
 
Nikon D5100 128 mm 97 mm 79 mm 560 g 660 n Apr 2011 749ebay.com
11.
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599ebay.com
12.
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599ebay.com
13.
 
Nikon D60 126 mm 94 mm 64 mm 522 g 500 n Jan 2008 629ebay.com
14.
 
Nikon D90 132 mm 103 mm 77 mm 703 g 850 n Aug 2008 1,299ebay.com
15.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
16.
 
Nikon D80 132 mm 103 mm 77 mm 668 g 600 n Aug 2006 999ebay.com
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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 D5000 was launched at a markedly lower price (by 91 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

The size of the sensor inside a digital camera is one of the key determinants 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D5000 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 D5000 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Nikon D5000 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the D5000 (12.2MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 5.53μm for the D5000). Yet, the 645Z is a much more recent model (by 5 years) than the D5000, 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 D5000 are 21.4 x 14.2 inches or 54.5 x 36.2 cm for good quality, 17.2 x 11.4 inches or 43.6 x 28.9 cm for very good quality, and 14.3 x 9.5 inches or 36.3 x 24.1 cm for excellent quality prints.

The Nikon D5000 has a native sensitivity range from ISO 200 to ISO 3200, which can be extended to ISO 200-6400. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

D5000 versus 645Z MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 D5000 (overall score 29 points higher). The advantage is based on 3.3 bits higher color depth, 2.2 EV in additional dynamic range, and 2.4 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D5000 APS-C 12.2 4288 2848720/24p22.712.586872
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
5.
 
Canon XSi APS-C 12.2 4272 2848none21.910.869261
6.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
7.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
8.
 
Nikon D5600 APS-C 24.0 6000 40001080/60p24.114.0130684
9.
 
Nikon D5200 APS-C 24.0 6000 40001080/60i24.213.9128484
10.
 
Nikon D5100 APS-C 16.1 4928 32641080/30p23.513.6118380
11.
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
12.
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
13.
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
14.
 
Nikon D90 APS-C 12.2 4288 2848720/24p22.712.597773
15.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
16.
 
Nikon D80 APS-C 10.0 3872 2592none22.111.252461
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
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Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the 645Z provides a better video resolution than the D5000. It can shoot movie footage at 1080/60i, while the Nikon is limited to 720/24p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The D5000 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 D5000 (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 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Nikon D5000 and Pentax 645Z in connection with corresponding information for a sample of similar cameras.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Nikon D5000optical n2.7 / 230 full-flex n 1/4000s 4.0/s Y n
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
3.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
5.
 
Canon XSioptical n3.0 / 230 fixed n 1/4000s 3.5/s Y n
6.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3/s n n
7.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0/s n n
8.
 
Nikon D5600optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
9.
 
Nikon D5200optical n3.0 / 921 swivel n 1/4000s 5.0/s Y n
10.
 
Nikon D5100optical n3.0 / 921 swivel n 1/4000s 4.0/s Y n
11.
 
Nikon D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
12.
 
Nikon D3000optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
13.
 
Nikon D60optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
14.
 
Nikon D90optical Y3.0 / 920 fixed n 1/4000s 4.5/s Y n
15.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
16.
 
Nikon D80optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
17.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
padding

One difference between the cameras concerns the presence of an on-board flash. The D5000 has one, while the 645Z does not. While the built-in flash of the D5000 is not very powerful, it can at times be useful as a fill-in light.

The D5000 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the 645Z does not have a selfie-screen.

The Nikon D5000 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 D5000 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 D5000 only has one slot. The 645Z supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D5000 cannot take advantage of Ultra High Speed SD cards.

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Connectivity comparison

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 D5000 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D5000Ymono / mono--mini2.0---
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 5DSYmono / monoY-mini3.0---
4.
 
Canon 5DS RYmono / monoY-mini3.0---
5.
 
Canon XSiY- / ---mini2.0---
6.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
7.
 
Leica SLYstereo / monoYYfull3.0Y--
8.
 
Nikon D5600Ystereo / monoY-mini2.0YYY
9.
 
Nikon D5200Ystereo / monoY-mini2.0---
10.
 
Nikon D5100Ymono / monoY-mini2.0---
11.
 
Nikon D3100Ymono / mono--mini2.0---
12.
 
Nikon D3000Y- / ----2.0---
13.
 
Nikon D60Y- / ----2.0---
14.
 
Nikon D90Ymono / mono--mini2.0---
15.
 
Nikon D40XY- / ----2.0---
16.
 
Nikon D80Y- / ----2.0---
17.
 
Pentax 645DYstereo / ----2.0---
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It is notable that the 645Z has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The D5000 does not feature such a mic input.

Studio photographers will appreciate that the Pentax 645Z (unlike the D5000) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D5000 and the 645Z have been discontinued, but can regularly be found used on ebay. The D5000 was replaced by the Nikon D5100, while the 645Z does not have a direct successor. Further information on the features and operation of the D5000 and 645Z can be found, respectively, in the Nikon D5000 Manual (free pdf) or the online Pentax 645Z Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Nikon D5000 and the Pentax 645Z? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Nikon D5000:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (4 vs 3 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (127x104mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 960g or 62 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 (91 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in April 2009).

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Reasons to prefer the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 12.2MP), which boosts linear resolution by 100%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (29 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3.3 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.2 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.4 stops ISO advantage).
  • Better video: Provides higher definition movie capture (1080/60i vs 720/24p).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • 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 0.51x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 2.7") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 230k dots).
  • Longer lasting: Gets more shots (650 versus 510) 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 5 years of technical progress since the D5000 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the 645Z is the clear winner of the contest (20 : 9 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.

D5000 09:20 645Z

How about other alternatives? Do the specifications of the Nikon D5000 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 technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the D5000 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.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D5000..+ +..75/1004/54.5/5 Apr 2009 749ebay.com
2.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499ebay.com
3.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 3,699ebay.com
4.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
5.
 
Canon XSi..+ +..+ +4/54.5/5 Jan 2008 799ebay.com
6.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 8,995ebay.com
7.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 7,450ebay.com
8.
 
Nikon D56004/5..4/579/1004.5/54/5 Nov 2016 699ebay.com
9.
 
Nikon D52004/5+ +..79/1004.5/54.5/5 Nov 2012 749ebay.com
10.
 
Nikon D51005/5+ +..76/1004.5/54.5/5 Apr 2011 749ebay.com
11.
 
Nikon D31005/5+ +..72/1004.5/54.5/5 Aug 2010 599ebay.com
12.
 
Nikon D3000..+..72/1004/54.5/5 Jul 2009 599ebay.com
13.
 
Nikon D60..80/100..+ +4/54.5/5 Jan 2008 629ebay.com
14.
 
Nikon D90..+ +..+ +4/54.5/5 Aug 2008 1,299ebay.com
15.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
16.
 
Nikon D80..+..+ +o4.5/5 Aug 2006 999ebay.com
17.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Nikon D5000 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 Specifications
    Camera Model Nikon D5000 Pentax 645Z
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax 645 mount lenses
    Launch Date April 2009 April 2014
    Launch Price USD 749 USD 8,499
    Sensor Specs Nikon D5000 Pentax 645Z
    Sensor Technology CMOS CMOS
    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
    Crop Factor 1.5x 0.79x
    Sensor Resolution 12.2 Megapixels 51.1 Megapixels
    Image Resolution 4288 x 2848 pixels 8256 x 6192 pixels
    Pixel Pitch 5.53 μm 5.30 μm
    Pixel Density 3.28 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 720/24p Video 1080/60i Video
    ISO Setting 200 - 3,200 ISO 100 - 204,800 ISO
    ISO Boost 200 - 6,400 ISO no Enhancement
    Image Processor EXPEED PRIME III
    DXO Sensor Quality (score) 72 101
    DXO Color Depth (bits) 22.7 26.0
    DXO Dynamic Range (EV) 12.5 14.7
    DXO Low Light (ISO) 868 4505
    Screen Specs Nikon D5000 Pentax 645Z
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 98%
    Viewfinder Magnification 0.51x 0.78x
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 2.7inch 3.2inch
    LCD Resolution 230k dots 1037k dots
    LCD Attachment Fully flexible screen Tilting screen
    Shooting Specs Nikon D5000 Pentax 645Z
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 4 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy100 000 actuations100 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDHC cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support no UHS-I
    Connectivity Specs Nikon D5000 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 3.0
    HDMI Port mini HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D5000 Pentax 645Z
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL9a Pentax D-LI90
    Battery Life (CIPA)510 shots per charge650 shots per charge
    Body Dimensions 127 x 104 x 80 mm
    (5.0 x 4.1 x 3.1 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 590 g (20.8 oz) 1550 g (54.7 oz)
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    Check 645Z offers at
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