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Nikon D800 vs Pentax 645Z

The Nikon D800 and the Pentax 645Z are two professional cameras that were officially introduced, respectively, in February 2012 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D800) and a medium format (645Z) sensor. The Nikon has a resolution of 36.2 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 D800
versus
Pentax 645Z
Nikon D800   Pentax 645Z
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
36.2 MP, Full Frame Sensor 51.1 MP, Medium Format Sensor
1080/30p Video 1080/60i Video
ISO 100-6,400 (50 - 25,600) ISO 100-204,800
Optical viewfinder Optical viewfinder
3.2 LCD, 921k dots 3.2 LCD, 1037k dots
Fixed screen (not touch-sensitive) Tilting screen (not touch-sensitive)
4 shutter flaps per second 3 shutter flaps per second
Weathersealed bodyWeathersealed body
900 shots per battery charge650 shots per battery charge
146 x 123 x 82 mm, 1000 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 D800 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

The side-by-side display below illustrates the physical size and weight of the Nikon D800 and the Pentax 645Z. 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 measures are rounded to the nearest millimeter.

Size Nikon D800 vs Pentax 645Z
Compare D800 versus 645Z top
Comparison D800 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 somewhat larger (2 percent) than the Nikon D800. Moreover, the 645Z is substantially heavier (55 percent) than the D800. 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 D800 gets 900 shots out of its EN-EL15 battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D800 146 mm 123 mm 82 mm 1000 g 900 Y Feb 2012 2,999i
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 i
3.
 
Canon 5D Mark IV 151 mm 116 mm 76 mm 890 g 900 Y Aug 2016 3,499 i
4.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
5.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
6.
 
Canon 5D Mark III 152 mm 116 mm 76 mm 950 g 950 Y Mar 2012 3,499i
7.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995i
8.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450i
9.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 i
10.
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299i
11.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749i
12.
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 1,999 i
13.
 
Nikon D4 160 mm 157 mm 91 mm 1340 g 2600 Y Jan 2012 5,999i
14.
 
Nikon D600 141 mm 113 mm 82 mm 850 g 900 Y Sep 2012 2,099i
15.
 
Nikon D800E 146 mm 123 mm 82 mm 1000 g 900 Y Feb 2012 3,299i
16.
 
Nikon D700 147 mm 123 mm 77 mm 1074 g 1000 Y Jul 2008 2,999i
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D800 was launched at a markedly lower price (by 65 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Nikon D800 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 D800 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Nikon D800 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the D800 (36.2MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 4.88μm for the D800) due to its larger sensor. Moreover, the 645Z is a much more recent model (by 2 years and 2 months) than the D800, and its sensor will 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 D800 are 36.8 x 24.6 inches or 93.5 x 62.4 cm for good quality, 29.4 x 19.6 inches or 74.8 x 49.9 cm for very good quality, and 24.5 x 16.4 inches or 62.3 x 41.6 cm for excellent quality prints.

The Nikon D800 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).

D800 versus 645Z MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 has a markedly higher DXO score than the D800 (overall score 6 points higher), which will translate into better image quality. The advantage is based on 0.7 bits higher color depth, 0.3 EV in additional dynamic range, and 0.7 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
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D800 Full Frame 36.2 7360 49121080/30p25.314.4285395
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon 5D Mark IV Full Frame 30.1 6720 44804K/30p24.813.6299591
4.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
5.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
6.
 
Canon 5D Mark III Full Frame 22.1 5760 38401080/30p24.011.7229381
7.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
8.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
9.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
10.
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
11.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
12.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
13.
 
Nikon D4 Full Frame 16.2 4928 32801080/30p24.713.1296589
14.
 
Nikon D600 Full Frame 24.2 6016 40161080/30p25.114.2298094
15.
 
Nikon D800E Full Frame 36.2 7360 49121080/30p25.614.3297996
16.
 
Nikon D700 Full Frame 12.1 4256 2832none23.512.2230380
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282

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 645Z provides a faster frame rate than the D800. It can shoot movie footage at 1080/60i, while the Nikon is limited to 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The D800 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 D800 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 0.70x), 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 D800, the Pentax 645Z, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Nikon D800optical Y3.2 / 921 fixed n 1/8000s 4.0 Y n
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0 n n
3.
 
Canon 5D Mark IVoptical Y3.2 / 1620 fixed Y 1/8000s 7.0 n n
4.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0 n n
5.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0 n n
6.
 
Canon 5D Mark IIIoptical Y3.2 / 1040 fixed n 1/8000s 6.0 n n
7.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3 n n
8.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0 n n
9.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0 n n
10.
 
Nikon D810optical Y3.2 / 1229 fixed n 1/8000s 5.0 Y n
11.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5 n n
12.
 
Nikon D610optical Y3.2 / 921 fixed n 1/4000s 6.0 Y n
13.
 
Nikon D4optical Y3.2 / 921 fixed n 1/8000s 11.0 n n
14.
 
Nikon D600optical Y3.0 / 921 fixed n 1/4000s 5.5 Y n
15.
 
Nikon D800Eoptical Y3.2 / 921 fixed n 1/8000s 4.0 Y n
16.
 
Nikon D700optical Y3.0 / 922 fixed n 1/8000s 8.0 Y n
17.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1 n n

One difference between the cameras concerns the presence of an on-board flash. The D800 has one, while the 645Z does not. While the built-in flash of the D800 is not very powerful, it can at times be useful as a fill-in light.

The Nikon D800 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 D800 writes its imaging data to Compact Flash or SDXC cards, while the 645Z uses 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

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 D800 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
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D800Ymono / monoYYmini3.0---
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 5D Mark IVYmono / monoYYmini3.0YY-
4.
 
Canon 5DSYmono / monoY-mini3.0---
5.
 
Canon 5DS RYmono / monoY-mini3.0---
6.
 
Canon 5D Mark IIIYmono / monoYYmini2.0---
7.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
8.
 
Leica SLYstereo / monoYYfull3.0Y--
9.
 
Nikon D850Ystereo / monoYYmini3.0YYY
10.
 
Nikon D810Ystereo / monoYYmini3.0Y--
11.
 
Nikon DfY- / ---mini2.0---
12.
 
Nikon D610Ymono / monoYYmini2.0---
13.
 
Nikon D4Ymono / monoYYmicro2.0---
14.
 
Nikon D600Ymono / monoYYmini2.0---
15.
 
Nikon D800EYmono / monoYYmini3.0---
16.
 
Nikon D700Y- / ---mini2.0---
17.
 
Pentax 645DYstereo / ----2.0---

It is notable that the D800 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 D800 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the D800 was succeeded by the Nikon D810. 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

So how do things add up? Which of the two cameras – the Nikon D800 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.

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Reasons to prefer the Nikon D800:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • 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%).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (4 vs 3 flaps/sec) to capture the decisive moment.
  • Less heavy: Is lighter (by 550g or 35 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (900 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 (65 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2012).

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Arguments in favor of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 36.2MP), which boosts linear resolution by 17%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (0.7 stops ISO advantage).
  • Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 921k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • More modern: Reflects 2 years and 2 months of technical progress since the D800 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the D800 comes out slightly ahead of the 645Z (10 : 9 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D800 10:09 645Z

How about other alternatives? Do the specifications of the Nikon D800 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 remains incomplete and does no justice, for example, to the way the D800 or the 645Z perform in practice. 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D8005/5+ +..82/1005/55/5 Feb 2012 2,999i
2.
 
Pentax 645Z5/5......4.5/55/5 Apr 2014 8,499 i
3.
 
Canon 5D Mark IV4.5/5+ +4/587/1004.5/54.5/5 Aug 2016 3,499 i
4.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 3,699 i
5.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699 i
6.
 
Canon 5D Mark III..+ +..82/1004.5/54.5/5 Mar 2012 3,499i
7.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 8,995i
8.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 7,450i
9.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 i
10.
 
Nikon D8105/5..5/586/1005/54.5/5 Jun 2014 3,299i
11.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 2,749i
12.
 
Nikon D6104/5+ +..87/1004.5/54.5/5 Oct 2013 1,999 i
13.
 
Nikon D4........4.5/54.5/5 Jan 2012 5,999i
14.
 
Nikon D6004/5+ +..87/1005/54.5/5 Sep 2012 2,099i
15.
 
Nikon D800E......84/1005/55/5 Feb 2012 3,299i
16.
 
Nikon D700..89/100..+ +4.5/54.5/5 Jul 2008 2,999i
17.
 
Pentax 645D5/5.......... Mar 2010 9,995i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Nikon D800:
Check Ebay offers
Pentax 645Z:
Check Amazon price

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. 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 D800 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 D800 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 2012 April 2014
    Launch Price USD 2,999 USD 8,499
    Sensor Specs Nikon D800 Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor Medium Format Sensor
    Sensor Size 35.9 x 24.0 mm 43.8 x 32.8 mm
    Sensor Area 861.6 mm2 1436.64 mm2
    Sensor Diagonal 43.2 mm 54.7 mm
    Crop Factor 1.0x 0.79x
    Sensor Resolution 36.2 Megapixels 51.1 Megapixels
    Image Resolution 7360 x 4912 pixels 8256 x 6192 pixels
    Pixel Pitch 4.88 μm 5.30 μm
    Pixel Density 4.20 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/30p Video 1080/60i Video
    ISO Setting 100 - 6,400 ISO 100 - 204,800 ISO
    ISO Boost 50 - 25,600 ISO no Enhancement
    Image Processor EXPEED 3 PRIME III
    DXO Sensor Quality (score) 95 101
    DXO Color Depth (bits) 25.3 26.0
    DXO Dynamic Range (EV) 14.4 14.7
    DXO Low Light (ISO) 2853 4505
    Screen Specs Nikon D800 Pentax 645Z
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.70x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.2inch
    LCD Resolution 921k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D800 Pentax 645Z
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/4000s
    Continuous Shooting 4 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy200 000 actuations100 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF or SDXC cards SDXC cards
    Second Storage Option Dual card slots Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Nikon D800 Pentax 645Z
    External Flash Hotshoe Hotshoe
    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 D800 Pentax 645Z
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type EN-EL15 D-LI90
    Battery Life (CIPA)900 shots per charge650 shots per charge
    Body Dimensions 146 x 123 x 82 mm
    (5.7 x 4.8 x 3.2 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 1000 g (35.3 oz) 1550 g (54.7 oz)

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