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Pentax K-1 versus Nikon D5

The Pentax K-1 and the Nikon D5 are two digital cameras that were officially introduced, respectively, in February 2016 and January 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with a full frame sensor. The Pentax has a resolution of 36.2 megapixel, whereas the Nikon provides 20.7 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: Pentax K-1 vs Nikon D5

The side-by-side display below illustrates the physical size and weight of the Pentax K-1 and the Nikon D5. 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 K-1 – represents 100 percent across all the size and weight measures).

Compare Pentax K-1 vs Nikon D5
Compare K-1 versus D5 top
Compare K-1 and D5 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D5 is considerably larger (69 percent) than the Pentax K-1. Moreover, the D5 is substantially heavier (40 percent) than the K-1. 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 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 K-1 gets 760 shots out of its D-LI90 battery, while the D5 can take 3780 images on a single charge of its EN-EL18a power pack. As can be seen in the images above, the D5 has a battery grip build in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the K-1, Pentax provides the D-BG6 vertical grip as an optional accessory (see here on eBay).

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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
Pentax K-1» 5.4 in 4.3 in 3.4 in 35.6 oz 760 Y Feb 2016 1,799- i Pentax K-1
Nikon D5« 6.3 in 6.3 in 3.6 in 49.9 oz 3780 Y Jan 2016 6,499 i i Nikon D5
Canon 1D X Mark II« » 6.2 in 6.6 in 3.3 in 54.0 oz 1210 Y Feb 2016 5,999 i i Canon 1D X Mark II
Canon 5D Mark IV« » 5.9 in 4.6 in 3.0 in 31.4 oz 900 Y Aug 2016 3,499 i i Canon 5D Mark IV
Nikon D850« » 5.7 in 4.9 in 3.1 in 35.5 oz 1840 Y Jul 2017 3,299 i i Nikon D850
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 D4S« » 6.3 in 6.2 in 3.6 in 47.6 oz 3020 Y Feb 2014 6,499- i Nikon D4S
Nikon D750« » 5.6 in 4.4 in 3.1 in 26.5 oz 1230 Y Sep 2014 2,299 i i Nikon D750
Nikon D610« » 5.6 in 4.4 in 3.2 in 30.0 oz 900 Y Oct 2013 1,999 i i Nikon D610
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 i i Olympus E-M1 II
Pentax K-1 II« » 5.4 in 4.3 in 3.4 in 35.6 oz 670 Y Feb 2018 1,999 i i Pentax K-1 II
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
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i Sony A7 III
Sony A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i Sony A7R III
Sony A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i i Sony A99 II
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i Sony A7R II
Sony A850« » 6.1 in 4.6 in 3.2 in 31.6 oz 880 Y Aug 2009 1,999- i Sony A850

Any camera purchase will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The K-1 was launched at a markedly lower price (by 72 percent) than the D5, 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: Pentax K-1 vs Nikon D5

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. 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.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.

Pentax K-1 and Nikon D5 sensor measures

With 36.2MP, the K-1 offers a higher resolution than the D5 (20.7MP), but the K-1 has smaller individual pixels (pixel pitch of 4.88μm versus 6.44μm for the D5). It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. Coming back to sensor resolution, it should be mentioned that the K-1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

Unlike the D5, the K-1 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).

K-1 versus D5 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the K-1 has a notably higher overall DXO score than the D5 (overall score 8 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.3 bits higher color depth, 2.3 EV in additional dynamic range, and 0.5 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Pentax K-1» Full Frame 36.2 7360 49121080/60i25.414.6328096Pentax K-1
Nikon D5« Full Frame 20.7 5588 37124K/30p25.112.3234388Nikon D5
Canon 1D X Mark II« » Full Frame 20.0 5472 36484K/60p24.113.5320788Canon 1D X Mark II
Canon 5D Mark IV« » Full Frame 30.1 6720 44804K/30p24.813.6299591Canon 5D Mark IV
Nikon D850« » Full Frame 45.4 8256 55044K/30p26.414.82660100Nikon D850
Nikon D500« » APS-C 20.7 5568 37124K/30p24.014.0132483Nikon D500
Nikon D4S« » Full Frame 16.2 4928 32801080/60p24.413.3307489Nikon D4S
Nikon D750« » Full Frame 24.2 6016 40161080/60p24.814.5295693Nikon D750
Nikon D610« » Full Frame 24.2 6016 40161080/30p25.114.4292594Nikon D610
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
Pentax K-1 II« » Full Frame 36.2 7360 49121080/60i----Pentax K-1 II
Pentax K-3 II« » APS-C 24.1 6016 40001080/60i23.613.6110680Pentax K-3 II
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792Sony A99 II
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
Sony A850« » Full Frame 24.4 6048 4032-23.812.2141579Sony A850

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 D5 provides a better video resolution than the K-1. It can shoot movie footage at 4K/30p, while the Pentax is limited to 1080/60i.

 

Feature comparison: Pentax K-1 vs Nikon D5

Apart from body and sensor, cameras can and do differ across a range of features. The K-1 and the D5 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 Pentax K-1, the Nikon D5, and comparable cameras. The full specs-sheets can be found in the camera manual or in the dpreview camera hub.

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
Pentax K-1»optical Y 3.2 1037 full-flex n 8000 4.4 n Y Pentax K-1
Nikon D5«optical Y 3.2 2359 fixed Y 8000 14.0 n n Nikon D5
Canon 1D X Mark II« »optical Y 3.2 1620 fixed Y 8000 16.0 n n Canon 1D X Mark II
Canon 5D Mark IV« »optical Y 3.2 1620 fixed Y 8000 7.0 n n Canon 5D Mark IV
Nikon D850« »optical Y 3.2 2359 tilting Y 8000 9.0 n n Nikon D850
Nikon D500« »optical Y 3.2 2359 tilting Y 8000 10.0 n n Nikon D500
Nikon D4S« »optical Y 3.2 921 fixed n 8000 11.0 n n Nikon D4S
Nikon D750« »optical Y 3.2 1229 tilting n 4000 6.0 Y n Nikon D750
Nikon D610« »optical Y 3.2 921 fixed n 4000 6.0 Y n Nikon D610
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 8000 18.0 n Y Olympus E-M1 II
Pentax K-1 II« »optical Y 3.2 1037 full-flex n 8000 4.4 n Y Pentax K-1 II
Pentax K-3 II« »optical Y 3.2 1037 fixed n 8000 8.3 n Y Pentax K-3 II
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y Sony A7 III
Sony A7R III« »3686 n 3.0 1440 tilting Y 8000 10.0 n Y Sony A7R III
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y Sony A99 II
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y Sony A7R II
Sony A850« »optical Y 3.0 922 fixed n 8000 3.0 n Y Sony A850

One feature that differentiates the K-1 and the D5 is in-body image stabilization (IBIS). The K-1 reduces the risk of handshake-induced blur with all attached lenses, while the D5 has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.

The K-1 writes its imaging data to SDXC cards, while the D5 uses Compact Flash or XQD cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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
Pentax K-1»YstereomonoYYmicro2.0Y--Pentax K-1
Nikon D5«YstereomonoYYmini3.0---Nikon D5
Canon 1D X Mark II« »YmonomonoYYmini3.0---Canon 1D X Mark II
Canon 5D Mark IV« »YmonomonoYYmini3.0YY-Canon 5D Mark IV
Nikon D850« »YstereomonoYYmini3.0YYYNikon D850
Nikon D500« »YstereomonoYYmini3.0YYYNikon D500
Nikon D4S« »YmonomonoYYmini2.0---Nikon D4S
Nikon D750« »YstereomonoYYmini2.0Y--Nikon D750
Nikon D610« »YmonomonoYYmini2.0---Nikon D610
Olympus E-M1 II« »YstereomonoYYmicro3.0Y--Olympus E-M1 II
Pentax K-1 II« »YstereomonoYYmicro2.0Y--Pentax K-1 II
Pentax K-3 II« »YmonomonoYYmini3.0---Pentax K-3 II
Sony A7 III« »YstereomonoYYmicro3.1YYYSony A7 III
Sony A7R III« »YstereomonoYYmicro3.1YYYSony A7R III
Sony A99 II« »YstereomonoYYmicro2.0YYYSony A99 II
Sony A7R II« »YstereomonoYYmicro2.0YY-Sony A7R II
Sony A850« »Y----mini2.0---Sony A850

The D5 is a current model that online retailers, such as amazon, will have in stock. In contrast, the K-1 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the K-1 was succeeded by the Pentax K-1 II.

Review summary: Pentax K-1 vs Nikon D5

So what conclusions can be drawn? Which of the two cameras – the Pentax K-1 or the Nikon D5 – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.

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Reasons to prefer the Pentax K-1:

  • More detail: Offers more megapixels (36.2 vs 20.7MP) with a 32% higher linear resolution.
  • 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.
  • Better image quality: Scores markedly higher (8 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (2.3 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
  • More flexible LCD: Has full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More compact: Is smaller (137x110mm vs 160x159mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 405g or 29 percent) and hence easier to carry around.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • More affordable: Was introduced into a lower priced category (72 percent cheaper at launch).

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Arguments in favor of the Nikon D5:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • More detailed LCD: Has a higher resolution rear screen (2359k vs 1037k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (14 vs 4.4 flaps/sec) to capture the decisive moment.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Gets more shots (3780 versus 760) out of a single battery charge.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).

If the number of relative strengths (bullet points above) is taken as a guide, the K-1 is the clear winner of the match-up (12 : 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.

K-1 12:08 D5

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the K-1 or the D5. 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 expert reviews are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available 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
Pentax K-1»-84/1005/54.5/55/5 Feb 2016 1,799- i Pentax K-1
Nikon D5«-89/1004.5/55/55/5 Jan 2016 6,499 i i Nikon D5
Canon 1D X Mark II« »-89/1004.5/55/54.5/5 Feb 2016 5,999 i i Canon 1D X Mark II
Canon 5D Mark IV« »HiRec87/1004.5/55/54.5/5 Aug 2016 3,499 i i Canon 5D Mark IV
Nikon D850« »HiRec89/1004.5/55/55/5 Jul 2017 3,299 i i Nikon D850
Nikon D500« »HiRec91/1004.5/55/55/5 Jan 2016 1,999 i i Nikon D500
Nikon D4S« »--4.5/55/54.5/5 Feb 2014 6,499- i Nikon D4S
Nikon D750« »HiRec90/1004.5/55/54.5/5 Sep 2014 2,299 i i Nikon D750
Nikon D610« »HiRec87/1004.5/54.5/54.5/5 Oct 2013 1,999 i i Nikon D610
Olympus E-M1 II« »HiRec85/1004.5/55/54.5/5 Sep 2016 1,999 i i Olympus E-M1 II
Pentax K-1 II« »-79/1004.5/5-4.5/5 Feb 2018 1,999 i i Pentax K-1 II
Pentax K-3 II« »--5/54.5/55/5 Apr 2015 1,099 i i Pentax K-3 II
Sony A7 III« »HiRec89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
Sony A7R III« »HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i Sony A7R III
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i Sony A99 II
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
Sony A850« »-75/100-4/54.5/5 Aug 2009 1,999- i Sony A850

Care should be taken when interpreting the review scores above, 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.

 

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you do not see the camera that you are looking for, kindly get in touch, and I will try to locate and add the respective data to the application.

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