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Nikon D3X vs Pentax 645Z

The Nikon D3X and the Pentax 645Z are two professional cameras that were officially introduced, respectively, in December 2008 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D3X) and a medium format (645Z) sensor. The Nikon has a resolution of 24.4 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 D3X
versus
Pentax 645Z
Nikon D3X   Pentax 645Z
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
24.4 MP – Full Frame sensor 51.1 MP – Medium Format sensor
no Video 1080/60i Video
ISO 100-1,600 (50 - 6,400) ISO 100-204,800
Optical viewfinder Optical viewfinder
3.0" LCD – 922k dots 3.2" LCD – 1037k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
5 shutter flaps per second 3 shutter flaps per second
Weathersealed bodyWeathersealed body
4400 shots per battery charge650 shots per battery charge
160 x 157 x 88 mm, 1260 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 D3X 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 D3X and the Pentax 645Z are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

Size Nikon D3X vs Pentax 645Z
Compare D3X versus 645Z top
Comparison D3X 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 smaller (27 percent) than the Nikon D3X. However, the 645Z is markedly heavier (23 percent) than the D3X. 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 D3X gets 4400 shots out of its Nikon EN-EL4a battery, while the 645Z can take 650 images on a single charge of its Pentax D-LI90 power pack. As can be seen in the images above, the D3X has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D3X 160 mm 157 mm 88 mm 1260 g 4400 Y Dec 2008 US$ 7 999ebay.com
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 US$ 8 499ebay.com
3.
 
Canon 1Ds Mark III 150 mm 160 mm 80 mm 1385 g 1800 Y Aug 2007 US$ 7 999ebay.com
4.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 US$ 3 699ebay.com
5.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 US$ 3 699ebay.com
6.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 US$ 8 995ebay.com
7.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 US$ 7 449ebay.com
8.
 
Nikon D3 160 mm 157 mm 88 mm 1300 g 4300 Y Aug 2007 US$ 4 999ebay.com
9.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 US$ 5 199ebay.com
10.
 
Nikon D4 160 mm 157 mm 91 mm 1340 g 2600 Y Jan 2012 US$ 5 999ebay.com
11.
 
Nikon D4S 160 mm 157 mm 91 mm 1350 g 3020 Y Feb 2014 US$ 6 499ebay.com
12.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 US$ 6 499ebay.com
13.
 
Nikon D600 141 mm 113 mm 82 mm 850 g 900 Y Sep 2012 US$ 2 099ebay.com
14.
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 US$ 1 999ebay.com
15.
 
Nikon D700 147 mm 123 mm 77 mm 1074 g 1000 Y Jul 2008 US$ 2 999ebay.com
16.
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 US$ 2 299ebay.com
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 US$ 9 995ebay.com
Note: 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 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 D3X was somewhat cheaper (by 6 percent) than the 645Z at launch, but both cameras fall into the same price category. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D3X 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 D3X has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Nikon D3X and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the D3X (24.4MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 5.94μm for the D3X). Yet, the 645Z is a much more recent model (by 5 years and 4 months) than the D3X, 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 D3X are 30.2 x 20.2 inches or 76.8 x 51.2 cm for good quality, 24.2 x 16.1 inches or 61.4 x 41 cm for very good quality, and 20.2 x 13.4 inches or 51.2 x 34.1 cm for excellent quality prints.

The Nikon D3X has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 50-6400. 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.

D3X versus 645Z MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 D3X (overall score 13 points higher). The advantage is based on 1.3 bits higher color depth, 1 EV in additional dynamic range, and 1.2 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.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D3X Full Frame 24.4 6048 4032none24.713.7199288
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon 1Ds Mark III Full Frame 21.0 5616 3744none24.012.0166380
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.
 
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 D3 Full Frame 12.1 4256 2832none23.512.2229081
9.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
10.
 
Nikon D4 Full Frame 16.2 4928 32801080/30p24.713.1296589
11.
 
Nikon D4S Full Frame 16.2 4928 32801080/60p24.413.3307489
12.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
13.
 
Nikon D600 Full Frame 24.2 6016 40161080/30p25.114.2298094
14.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
15.
 
Nikon D700 Full Frame 12.1 4256 2832none23.512.2230380
16.
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282

Many modern cameras cannot only take still pictures, but also record videos. The 645Z indeed provides for movie recording, while the D3X does not. The highest resolution format that the 645Z can use is 1080/60i.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The D3X 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 D3X 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 table below summarizes some of the other core capabilities of the Nikon D3X and Pentax 645Z in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty 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 D3Xoptical Y3.0 / 922 fixed n 1/8000s 5.0/s n n
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
3.
 
Canon 1Ds Mark IIIoptical Y3.0 / 230 fixed n 1/8000s 5.0/s n n
4.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
5.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n 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 D3optical Y3.0 / 922 fixed n 1/8000s 11.0/s n n
9.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
10.
 
Nikon D4optical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
11.
 
Nikon D4Soptical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
12.
 
Nikon D5optical Y3.2 / 2359 fixed Y 1/8000s 14.0/s n n
13.
 
Nikon D600optical Y3.0 / 921 fixed n 1/4000s 5.5/s Y n
14.
 
Nikon D610optical Y3.2 / 921 fixed n 1/4000s 6.0/s Y n
15.
 
Nikon D700optical Y3.0 / 922 fixed n 1/8000s 8.0/s Y n
16.
 
Nikon D750optical Y3.2 / 1229 tilting n 1/4000s 6.0/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.

The Nikon D3X 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 D3X writes its imaging data to Compact Flash cards, while the 645Z uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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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 D3X 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
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D3XY- / ---mini2.0---
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 1Ds Mark IIIYmono / ----2.0---
4.
 
Canon 5DSYmono / monoY-mini3.0---
5.
 
Canon 5DS RYmono / monoY-mini3.0---
6.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
7.
 
Leica SLYstereo / monoYYfull3.0Y--
8.
 
Nikon D3Y- / ---mini2.0---
9.
 
Nikon D3SYstereo / ---mini2.0---
10.
 
Nikon D4Ymono / monoYYmicro2.0---
11.
 
Nikon D4SYmono / monoYYmini2.0---
12.
 
Nikon D5Ystereo / monoYYmini3.0---
13.
 
Nikon D600Ymono / monoYYmini2.0---
14.
 
Nikon D610Ymono / monoYYmini2.0---
15.
 
Nikon D700Y- / ---mini2.0---
16.
 
Nikon D750Ystereo / monoYYmini2.0Y--
17.
 
Pentax 645DYstereo / ----2.0---

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the D3X and the 645Z have been discontinued, but can regularly be found used on ebay. Neither of the two has a direct successor, so they represent the end of the respective camera lines from Nikon and Pentax. Further information on the features and operation of the D3X and 645Z can be found, respectively, in the Nikon D3X Manual (free pdf) or the online Pentax 645Z Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Nikon D3X 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 D3X:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • 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 (5 vs 3 flaps/sec) to capture the decisive moment.
  • Less heavy: Is lighter (by 290g or 19 percent) and hence easier to carry around.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (4400 versus 650) on a single battery charge.
  • More heavily discounted: Has been available for much longer (launched in December 2008).

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Reasons to prefer the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 24.4MP), which boosts linear resolution by 42%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (13 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.3 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 (1.2 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • 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 922k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • More compact: Is smaller (156x117mm vs 160x157mm) and will fit more readily into a bag.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • More modern: Reflects 5 years and 4 months of technical progress since the D3X launch.

If the number of relative strengths (bullet points above) is taken as a guide, the 645Z is the clear winner of the contest (14 : 8 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 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.

D3X 08:14 645Z

How about other alternatives? Do the specifications of the Nikon D3X 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 D3X 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

This is why hands-on reviews by experts are important. 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D3X......86/1004/55/5 Dec 2008 US$ 7 999ebay.com
2.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 US$ 8 499ebay.com
3.
 
Canon 1Ds Mark III......+ +4.5/5.. Aug 2007 US$ 7 999ebay.com
4.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 US$ 3 699ebay.com
5.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 US$ 3 699ebay.com
6.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 US$ 8 995ebay.com
7.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 US$ 7 449ebay.com
8.
 
Nikon D3......+ +5/54.5/5 Aug 2007 US$ 4 999ebay.com
9.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 US$ 5 199ebay.com
10.
 
Nikon D4........4.5/54.5/5 Jan 2012 US$ 5 999ebay.com
11.
 
Nikon D4S5/5......4.5/54.5/5 Feb 2014 US$ 6 499ebay.com
12.
 
Nikon D5....4/589/1004.5/55/5 Jan 2016 US$ 6 499ebay.com
13.
 
Nikon D6004/5+ +..87/1005/54.5/5 Sep 2012 US$ 2 099ebay.com
14.
 
Nikon D6104/5+ +..87/1004.5/54.5/5 Oct 2013 US$ 1 999ebay.com
15.
 
Nikon D700..89/100..+ +4.5/54.5/5 Jul 2008 US$ 2 999ebay.com
16.
 
Nikon D7505/5+ +4/590/1004.5/54.5/5 Sep 2014 US$ 2 299ebay.com
17.
 
Pentax 645D5/5.......... Mar 2010 US$ 9 995ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Nikon D3X 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 D3X Pentax 645Z
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax 645 mount lenses
    Launch Date December 2008 April 2014
    Launch Price USD 7,999 USD 8,499
    Sensor Specs Nikon D3X 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 24.4 Megapixels 51.1 Megapixels
    Image Resolution 6048 x 4032 pixels 8256 x 6192 pixels
    Pixel Pitch 5.94 μm 5.30 μm
    Pixel Density 2.83 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 50 - 6,400 ISO no Enhancement
    Image Processor EXPEED PRIME III
    DXO Sensor Quality (score) 88 101
    DXO Color Depth (bits) 24.7 26.0
    DXO Dynamic Range (EV) 13.7 14.7
    DXO Low Light (ISO) 1992 4505
    Screen Specs Nikon D3X 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 3.0inch 3.2inch
    LCD Resolution 922k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D3X 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 5 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy300 000 actuations100 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium CF cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    Connectivity Specs Nikon D3X Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket 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 D3X Pentax 645Z
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Nikon EN-EL4a Pentax D-LI90
    Battery Life (CIPA)4400 shots per charge650 shots per charge
    Body Dimensions 160 x 157 x 88 mm
    (6.3 x 6.2 x 3.5 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 1260 g (44.4 oz) 1550 g (54.7 oz)
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