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Nikon D3400 versus Pentax K-3

The Nikon D3400 and the Pentax K-3 are two digital cameras that were officially introduced, respectively, in August 2016 and October 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Nikon has a resolution of 24 megapixel, whereas the Pentax provides 24.1 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Nikon D3400 vs Pentax K-3

An illustration of the physical size and weight of the Nikon D3400 and the Pentax K-3 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. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the D3400 – represents the basis or 100 percent across all the size and weight measures).

Compare Nikon D3400 vs Pentax K-3
Compare D3400 versus K-3 top
Compare D3400 and K-3 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 is notably larger (8 percent) than the Nikon D3400. Moreover, the K-3 is substantially heavier (80 percent) than the D3400. It is noteworthy in this context that the K-3 is splash and dust-proof, while the D3400 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 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 D3400 gets 1200 shots out of its EN-EL14a battery, while the K-3 can take 560 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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Nikon D3400» 4.9 in 3.9 in 3.0 in 15.7 oz 1200 n Aug 2016 499- i Nikon D3400
Pentax K-3« 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299- i Pentax K-3
Canon SL2« » 4.8 in 3.7 in 2.8 in 16.0 oz 650 n Jun 2017 549 i i Canon SL2
Canon 70D« » 5.5 in 4.1 in 3.1 in 26.6 oz 920 Y Jul 2013 1,199- i Canon 70D
Nikon D3500« » 4.9 in 3.8 in 2.8 in 12.9 oz 1550 n Aug 2018 429 i i Nikon D3500
Nikon D5600« » 4.9 in 3.8 in 2.8 in 16.4 oz 970 n Nov 2016 699 i i Nikon D5600
Nikon D500« » 5.8 in 4.5 in 3.2 in 30.3 oz 1240 Y Jan 2016 1,999 i i Nikon D500
Nikon D5500« » 4.9 in 3.8 in 2.8 in 14.8 oz 820 n Jan 2015 899- i Nikon D5500
Nikon D7200« » 5.4 in 4.2 in 3.0 in 27.0 oz 1110 Y Mar 2015 1,199- i Nikon D7200
Nikon D3300« » 4.9 in 3.9 in 3.0 in 15.2 oz 700 n Jan 2014 499- i Nikon D3300
Nikon D7100« » 5.4 in 4.2 in 3.0 in 27.0 oz 950 Y Feb 2013 1,199- i Nikon D7100
Nikon D5300« » 4.9 in 3.9 in 3.0 in 16.9 oz 600 n Oct 2013 799- i Nikon D5300
Nikon D3200« » 4.9 in 3.8 in 3.0 in 17.8 oz 540 n Apr 2012 599- i Nikon D3200
Nikon D5200« » 5.1 in 3.9 in 3.1 in 19.6 oz 500 n Nov 2012 749- i Nikon D5200
Pentax KP« » 5.2 in 4.0 in 3.0 in 24.8 oz 390 Y Jan 2017 1,099 i i Pentax KP
Pentax K-3 II« » 5.2 in 3.9 in 3.0 in 28.2 oz 720 Y Apr 2015 1,099 i i Pentax K-3 II
Pentax K-5« » 5.2 in 3.8 in 2.9 in 26.8 oz 740 Y Sep 2010 1,099- i Pentax K-5

Any camera purchase will naturally be influenced heavily by the price. 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 D3400 was launched at a markedly lower price (by 62 percent) than the K-3, 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: Nikon D3400 vs Pentax K-3

The size of the imaging sensor is a crucial determinant 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.

Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.5. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D3400 and Pentax K-3 sensor measures

While the two cameras under review share the same sensor size, the K-3 offers a slightly higher resolution of 24.1 megapixel, compared with 24 MP of the D3400. This megapixel advantage translates into a 0.3 percent gain in linear resolution. On the other hand, these sensor specs imply that the K-3 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.90μm versus 3.91μm for the D3400). Moreover, it should be noted, that the D3400 is much more recent (by 2 years and 10 months) than the K-3, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of individual pixels. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

D3400 versus K-3 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 review, the D3400 has a notably higher overall DXO score than the K-3 (overall score 6 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 0.5 EV in additional dynamic range, -0 stops of reduced 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Nikon D3400» APS-C 24.0 6000 40001080/60p24.813.9119286Nikon D3400
Pentax K-3« APS-C 24.1 6016 40001080/60i23.713.4121680Pentax K-3
Canon SL2« » APS-C 24.0 6000 40001080/60p23.613.4104179Canon SL2
Canon 70D« » APS-C 20.0 5472 36481080/30p22.511.692668Canon 70D
Nikon D3500« » APS-C 24.0 6000 40001080/60p----Nikon D3500
Nikon D5600« » APS-C 24.0 6000 40001080/60p24.114.0130684Nikon D5600
Nikon D500« » APS-C 20.7 5568 37124K/30p24.014.0132483Nikon D500
Nikon D5500« » APS-C 24.0 6000 40001080/60p24.114.0143884Nikon D5500
Nikon D7200« » APS-C 24.0 6000 40001080/60p24.514.6133387Nikon D7200
Nikon D3300« » APS-C 24.0 6000 40001080/60p24.312.8138582Nikon D3300
Nikon D7100« » APS-C 24.0 6000 40001080/60p24.213.7125683Nikon D7100
Nikon D5300« » APS-C 24.0 6000 40001080/60p24.013.9133883Nikon D5300
Nikon D3200« » APS-C 24.1 6016 40001080/30p24.113.2113181Nikon D3200
Nikon D5200« » APS-C 24.0 6000 40001080/60i24.213.9128484Nikon D5200
Pentax KP« » APS-C 24.1 6016 40001080/60i----Pentax KP
Pentax K-3 II« » APS-C 24.1 6016 40001080/60i23.613.6110680Pentax K-3 II
Pentax K-5« » APS-C 16.1 4928 32641080/25p23.714.1116282Pentax K-5

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 D3400 provides a higher frame rate than the K-3. It can shoot video footage at 1080/60p, while the Pentax is limited to 1080/60i.

 

Feature comparison: Nikon D3400 vs Pentax K-3

Apart from body and sensor, cameras can and do differ across a range of features. The D3400 and the K-3 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 following table reports on some other key feature differences and similarities of the Nikon D3400, the Pentax K-3, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Nikon D3400»optical n 3.0 921 fixed n 4000 5.0 Y n Nikon D3400
Pentax K-3«optical Y 3.2 1037 fixed n 8000 8.3 Y Y Pentax K-3
Canon SL2« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon SL2
Canon 70D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 70D
Nikon D3500« »optical n 3.0 921 fixed n 4000 5.0 Y n Nikon D3500
Nikon D5600« »optical n 3.2 1037 swivel Y 4000 5.0 Y n Nikon D5600
Nikon D500« »optical Y 3.2 2359 tilting Y 8000 10.0 n n Nikon D500
Nikon D5500« »optical n 3.2 1037 swivel Y 4000 5.0 Y n Nikon D5500
Nikon D7200« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7200
Nikon D3300« »optical n 3.0 921 fixed n 4000 5.0 Y n Nikon D3300
Nikon D7100« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7100
Nikon D5300« »optical n 3.2 1037 swivel n 4000 5.0 Y n Nikon D5300
Nikon D3200« »optical n 3.0 921 fixed n 4000 4.0 Y n Nikon D3200
Nikon D5200« »optical n 3.0 921 swivel n 4000 5.0 Y n Nikon D5200
Pentax KP« »optical n 3.0 921 tilting n 6000 7.0 Y Y Pentax KP
Pentax K-3 II« »optical Y 3.2 1037 fixed n 8000 8.3 n Y Pentax K-3 II
Pentax K-5« »optical Y 3.0 921 fixed n 8000 7.0 Y Y Pentax K-5

One feature that differentiates the K-3 and the D3400 is in-body image stabilization (IBIS). The K-3 reduces the risk of handshake-induced blur with all attached lenses, while the D3400 has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.

Both the D3400 and the K-3 write their imaging data to SDXC cards. The K-3 features dual card slots, which can be very useful in case a memory card fails. In contrast, the D3400 only has one slot.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Nikon D3400»Ymonomono--mini2.0Y-YNikon D3400
Pentax K-3«YmonomonoYYmini3.0---Pentax K-3
Canon SL2« »YstereomonoY-mini2.0YYYCanon SL2
Canon 70D« »YstereomonoY-mini2.0Y--Canon 70D
Nikon D3500« »Ymonomono--mini2.0Y-YNikon D3500
Nikon D5600« »YstereomonoY-mini2.0YYYNikon D5600
Nikon D500« »YstereomonoYYmini3.0YYYNikon D500
Nikon D5500« »YstereomonoY-mini2.0Y--Nikon D5500
Nikon D7200« »YstereomonoYYmini2.0YY-Nikon D7200
Nikon D3300« »YmonomonoY-mini2.0---Nikon D3300
Nikon D7100« »YstereomonoYYmini2.0---Nikon D7100
Nikon D5300« »YstereomonoY-mini2.0Y--Nikon D5300
Nikon D3200« »YmonomonoY-mini2.0---Nikon D3200
Nikon D5200« »YstereomonoY-mini2.0---Nikon D5200
Pentax KP« »YstereomonoY--2.0Y--Pentax KP
Pentax K-3 II« »YmonomonoYYmini3.0---Pentax K-3 II
Pentax K-5« »YstereomonoY-mini2.0---Pentax K-5

Both the D3400 and the K-3 have been discontinued, but can regularly be found used on eBay. The K-3 was replaced by the Pentax K-3 II, while the D3400 was followed by the Nikon D3500.

Review summary: Nikon D3400 vs Pentax K-3

So what conclusions can be drawn? Is there a clear favorite between the Nikon D3400 and the Pentax K-3? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Nikon D3400:

  • Better image quality: Scores markedly higher (6 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
  • Better video: Provides higher movie framerates (1080/60p versus 1080/60i).
  • Less heavy: Is lighter (by 355g or 44 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (1200 versus 560) on a single battery charge.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More affordable: Was introduced into a lower priced category (62 percent cheaper at launch).
  • More modern: Reflects 2 years and 10 months of technical progress since the K-3 launch.

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Reasons to prefer the Pentax K-3:

  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 921k dots).
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (8.3 vs 5 flaps/sec) to capture the decisive moment.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been around for much longer (launched in October 2013).

If the count of relative strengths (bullet points above) is taken as a measure, the K-3 emerges as the winner of the match-up (12 : 9 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.

D3400 09:12 K-3

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the D3400 and the K-3 in practical situations. 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. This is why hands-on reviews by experts are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Nikon D3400»Rec76/1004/54.5/54.5/5 Aug 2016 499- i Nikon D3400
Pentax K-3«-83/1005/54.5/55/5 Oct 2013 1,299- i Pentax K-3
Canon SL2« »HiRec78/1004.5/54.5/54.5/5 Jun 2017 549 i i Canon SL2
Canon 70D« »HiRec83/1004.5/54.5/55/5 Jul 2013 1,199- i Canon 70D
Nikon D3500« »--4/5-4.5/5 Aug 2018 429 i i Nikon D3500
Nikon D5600« »-79/1004.5/54.5/54/5 Nov 2016 699 i i Nikon D5600
Nikon D500« »HiRec91/1004.5/55/55/5 Jan 2016 1,999 i i Nikon D500
Nikon D5500« »Rec79/1004.5/55/54.5/5 Jan 2015 899- i Nikon D5500
Nikon D7200« »HiRec84/1004.5/54/54.5/5 Mar 2015 1,199- i Nikon D7200
Nikon D3300« »Rec77/1004.5/54.5/54.5/5 Jan 2014 499- i Nikon D3300
Nikon D7100« »HiRec85/1004.5/55/54.5/5 Feb 2013 1,199- i Nikon D7100
Nikon D5300« »HiRec79/1004.5/54.5/54.5/5 Oct 2013 799- i Nikon D5300
Nikon D3200« »HiRec73/1004.5/54.5/54.5/5 Apr 2012 599- i Nikon D3200
Nikon D5200« »HiRec79/1004.5/54.5/54.5/5 Nov 2012 749- i Nikon D5200
Pentax KP« »-82/1005/5-4.5/5 Jan 2017 1,099 i i Pentax KP
Pentax K-3 II« »--5/54.5/55/5 Apr 2015 1,099 i i Pentax K-3 II
Pentax K-5« »-83/1005/54.5/54.5/5 Sep 2010 1,099- i Pentax K-5

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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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 use the search menu below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If the camera you are interested in is not available, kindly get in touch, and I will try to locate and add the respective data to the application.

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