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Nikon D3X vs Pentax K-3 II

The Nikon D3X and the Pentax K-3 II are two digital cameras that were announced, respectively, in December 2008 and April 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D3X) and an APS-C (K-3 II) sensor. The Nikon has a resolution of 24.4 megapixels, whereas the Pentax provides 24.1 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 K-3 II
Nikon D3X   Pentax K-3 II
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax K mount lenses
24.4 MP – Full Frame sensor 24.1 MP – APS-C sensor
no Video 1080/60i Video
ISO 100-1,600 (50 - 6,400) ISO 100-51,200
Optical viewfinder Optical viewfinder
3.0" LCD – 922k dots 3.2" LCD – 1037k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
5 shutter flaps per second 8.3 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
4400 shots per battery charge720 shots per battery charge
160 x 157 x 88 mm, 1260 g 131 x 100 x 77 mm, 800 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 K-3 II? 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

An illustration of the physical size and weight of the Nikon D3X and the Pentax K-3 II is provided 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 dimensions are rounded to the nearest millimeter.

The K-3 II can be obtained in two different colors (black, silver), while the D3X is only available in black.

Size Nikon D3X vs Pentax K-3 II
Compare D3X versus K-3 II top
Comparison D3X or K-3 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 II is considerably smaller (48 percent) than the Nikon D3X. Moreover, the K-3 II is substantially lighter (37 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 EN-EL4a battery, while the K-3 II can take 720 images on a single charge of its 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. In order to provide similar functionality for the K-3 II, Pentax provides the D-BG5 vertical grip as an optional accessory (see here on ebay).

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
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D3X 160 mm 157 mm 88 mm 1260 g 4400 Y Dec 2008 7,999ebay.com
2.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099ebay.com
3.
 
Canon 1Ds Mark III 150 mm 160 mm 80 mm 1385 g 1800 Y Aug 2007 7,999ebay.com
4.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499ebay.com
5.
 
Nikon D4S 160 mm 157 mm 91 mm 1350 g 3020 Y Feb 2014 6,499ebay.com
6.
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 2,299ebay.com
7.
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 1,999 amazon.com
8.
 
Nikon D4 160 mm 157 mm 91 mm 1340 g 2600 Y Jan 2012 5,999ebay.com
9.
 
Nikon D600 141 mm 113 mm 82 mm 850 g 900 Y Sep 2012 2,099ebay.com
10.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
11.
 
Nikon D700 147 mm 123 mm 77 mm 1074 g 1000 Y Jul 2008 2,999ebay.com
12.
 
Nikon D3 160 mm 157 mm 88 mm 1300 g 4300 Y Aug 2007 4,999ebay.com
13.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 amazon.com
14.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099ebay.com
15.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649 amazon.com
16.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299ebay.com
17.
 
Pentax K-5 131 mm 97 mm 73 mm 760 g 740 Y Sep 2010 1,099ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. 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 K-3 II was launched at a markedly lower price (by 86 percent) than the D3X, which puts it into a different market segment. 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.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D3X features a full frame sensor and the Pentax K-3 II an APS-C sensor. The sensor area in the K-3 II is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D3X and Pentax K-3 II sensor measures

With 24.4MP, the D3X offers a slightly higher resolution than the K-3 II (24.1MP), but the D3X nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.90μm for the K-3 II) due to its larger sensor. However, the K-3 II is a much more recent model (by 6 years and 4 months) than the D3X, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the K-3 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

Unlike the D3X, the K-3 II has the capacity to capture high quality composite images by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

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 K-3 II are ISO 100 to ISO 51200 (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 K-3 II MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 review, the D3X has a notably higher overall DXO score than the K-3 II (overall score 8 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 0.1 EV in additional dynamic range, and 0.8 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.

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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 D3X Full Frame 24.4 6048 4032none24.713.7199288
2.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
3.
 
Canon 1Ds Mark III Full Frame 21.0 5616 3744none24.012.0166380
4.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
5.
 
Nikon D4S Full Frame 16.2 4928 32801080/60p24.413.3307489
6.
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
7.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
8.
 
Nikon D4 Full Frame 16.2 4928 32801080/30p24.713.1296589
9.
 
Nikon D600 Full Frame 24.2 6016 40161080/30p25.114.2298094
10.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
11.
 
Nikon D700 Full Frame 12.1 4256 2832none23.512.2230380
12.
 
Nikon D3 Full Frame 12.1 4256 2832none23.512.2229081
13.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
14.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
15.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
16.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
17.
 
Pentax K-5 APS-C 16.1 4928 32641080/25p23.714.1116282
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. The K-3 II indeed provides for movie recording, while the D3X does not. The highest resolution format that the K-3 II can use is 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The D3X and the K-3 II 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the D3X has a higher magnification than the one of the K-3 II (0.70x vs 0.63x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Nikon D3X, the Pentax K-3 II, 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)
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 K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
3.
 
Canon 1Ds Mark IIIoptical Y3.0 / 230 fixed n 1/8000s 5.0/s n n
4.
 
Nikon D5optical Y3.2 / 2359 fixed Y 1/8000s 14.0/s n n
5.
 
Nikon D4Soptical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
6.
 
Nikon D750optical Y3.2 / 1229 tilting n 1/4000s 6.0/s Y n
7.
 
Nikon D610optical Y3.2 / 921 fixed n 1/4000s 6.0/s Y n
8.
 
Nikon D4optical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
9.
 
Nikon D600optical Y3.0 / 921 fixed n 1/4000s 5.5/s Y n
10.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
11.
 
Nikon D700optical Y3.0 / 922 fixed n 1/8000s 8.0/s Y n
12.
 
Nikon D3optical Y3.0 / 922 fixed n 1/8000s 11.0/s n n
13.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
14.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
15.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
16.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
17.
 
Pentax K-5optical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the K-3 II and the D3X is in-body image stabilization (IBIS). The K-3 II reduces the risk of handshake-induced blur with all attached lenses, while the D3X offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The Nikon D3X and the Pentax K-3 II 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 K-3 II uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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 K-3 II 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 D3XY- / ---mini2.0---
2.
 
Pentax K-3 IIYmono / monoYYmini3.0---
3.
 
Canon 1Ds Mark IIIYmono / ----2.0---
4.
 
Nikon D5Ystereo / monoYYmini3.0---
5.
 
Nikon D4SYmono / monoYYmini2.0---
6.
 
Nikon D750Ystereo / monoYYmini2.0Y--
7.
 
Nikon D610Ymono / monoYYmini2.0---
8.
 
Nikon D4Ymono / monoYYmicro2.0---
9.
 
Nikon D600Ymono / monoYYmini2.0---
10.
 
Nikon D3SYstereo / ---mini2.0---
11.
 
Nikon D700Y- / ---mini2.0---
12.
 
Nikon D3Y- / ---mini2.0---
13.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
14.
 
Pentax KPYstereo / monoY--2.0Y--
15.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
16.
 
Pentax K-3Ymono / monoYYmini3.0---
17.
 
Pentax K-5Ystereo / monoY-mini2.0---

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

Travel and landscape photographers will find it useful that the K-3 II has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the D3X and the K-3 II have been discontinued, but can regularly be found used on ebay. The K-3 II was replaced by the Pentax K-3 III, while the D3X does not have a direct successor. Further information on the features and operation of the D3X and K-3 II can be found, respectively, in the Nikon D3X Manual (free pdf) or the online Pentax K-3 II Manual.

Review summary

So how do things add up? Is the Nikon D3X better than the Pentax K-3 II or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Nikon D3X:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores markedly higher (8 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
  • Better low-light sensitivity: Requires less light for good images (0.8 stops ISO advantage).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.63x).
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (4400 versus 720) on a single battery charge.
  • More heavily discounted: Has been available for much longer (launched in December 2008).

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Arguments in favor of the Pentax K-3 II:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • 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).
  • Faster burst: Shoots at higher frequency (8.3 vs 5 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (131x100mm vs 160x157mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 460g or 37 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • More affordable: Was introduced into a lower priced category (86 percent cheaper at launch).
  • More modern: Reflects 6 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 K-3 II is the clear winner of the contest (13 : 8 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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 08:13 K-3 II

How about other alternatives? Do the specifications of the Nikon D3X and the Pentax K-3 II 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 D3X and the K-3 II in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D3X......86/1004/55/5 Dec 2008 7,999ebay.com
2.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099ebay.com
3.
 
Canon 1Ds Mark III......+ +4.5/5.. Aug 2007 7,999ebay.com
4.
 
Nikon D5....4/589/1004.5/55/5 Jan 2016 6,499ebay.com
5.
 
Nikon D4S5/5......4.5/54.5/5 Feb 2014 6,499ebay.com
6.
 
Nikon D7505/5+ +4/590/1004.5/54.5/5 Sep 2014 2,299ebay.com
7.
 
Nikon D6104/5+ +..87/1004.5/54.5/5 Oct 2013 1,999 amazon.com
8.
 
Nikon D4........4.5/54.5/5 Jan 2012 5,999ebay.com
9.
 
Nikon D6004/5+ +..87/1005/54.5/5 Sep 2012 2,099ebay.com
10.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
11.
 
Nikon D700..89/100..+ +4.5/54.5/5 Jul 2008 2,999ebay.com
12.
 
Nikon D3......+ +5/54.5/5 Aug 2007 4,999ebay.com
13.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 amazon.com
14.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099ebay.com
15.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 649 amazon.com
16.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 1,299ebay.com
17.
 
Pentax K-54/5....83/1005/54.5/5 Sep 2010 1,099ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted 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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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 D3X vs Pentax K-3 II

    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 K-3 II
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax K mount lenses
    Launch Date December 2008 April 2015
    Launch Price USD 7,999 USD 1,099
    Sensor Specs Nikon D3X Pentax K-3 II
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor APS-C Sensor
    Sensor Size 35.9 x 24.0 mm 23.5 x 15.6 mm
    Sensor Area 861.6 mm2 366.6 mm2
    Sensor Diagonal 43.2 mm 28.2 mm
    Crop Factor 1.0x 1.5x
    Sensor Resolution 24.4 Megapixels 24.1 Megapixels
    Image Resolution 6048 x 4032 pixels 6016 x 4000 pixels
    Pixel Pitch 5.94 μm 3.90 μm
    Pixel Density 2.83 MP/cm2 6.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 100 - 1,600 ISO 100 - 51,200 ISO
    ISO Boost 50 - 6,400 ISO no Enhancement
    Image Processor EXPEED PRIME III
    DXO Sensor Quality (score) 88 80
    DXO Color Depth (bits) 24.7 23.6
    DXO Dynamic Range (EV) 13.7 13.6
    DXO Low Light (ISO) 1992 1106
    Screen Specs Nikon D3X Pentax K-3 II
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x 0.63x
    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 Fixed screen
    Shooting Specs Nikon D3X Pentax K-3 II
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 5 shutter flaps/s 8.3 shutter flaps/s
    Shutter Life Expectancy300 000 actuations200 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    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 K-3 II
    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
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi no Wifi
    Geotagging no internal GPS GPS built-in
    Body Specs Nikon D3X Pentax K-3 II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type EN-EL4a D-LI90
    Battery Life (CIPA)4400 shots per charge720 shots per charge
    Body Dimensions 160 x 157 x 88 mm
    (6.3 x 6.2 x 3.5 in)
    131 x 100 x 77 mm
    (5.2 x 3.9 x 3.0 in)
    Camera Weight 1260 g (44.4 oz) 800 g (28.2 oz)
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    Check D3X offers at
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    Check K-3 II offers at
    ebay.com

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