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Nikon D5100 vs Pentax K-1

The Nikon D5100 and the Pentax K-1 are two digital cameras that were announced, respectively, in April 2011 and February 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D5100) and a full frame (K-1) sensor. The Nikon has a resolution of 16.1 megapixels, whereas the Pentax provides 36.2 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Nikon D5100
versus
Pentax K-1
Nikon D5100   Pentax K-1
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax K mount lenses
16.1 MP – APS-C sensor 36.2 MP – Full Frame sensor
1080/30p Video 1080/60i Video
ISO 100-6,400 (100 - 25,600) ISO 100-204,800
Optical viewfinder Optical viewfinder
3.0" LCD – 921k dots 3.2" LCD – 1037k dots
Swivel screen (not touch-sensitive) Fully flexible screen (no touchscreen)
4 shutter flaps per second 4.4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
660 shots per battery charge760 shots per battery charge
128 x 97 x 79 mm, 560 g 137 x 110 x 86 mm, 1010 g
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Check D5100 offers at
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Check K-1 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D5100 and the Pentax K-1? 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

An illustration of the physical size and weight of the Nikon D5100 and the Pentax K-1 is provided 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 width, height and depth dimensions are rounded to the nearest millimeter.

The K-1 can be obtained in two different colors (black, silver), while the D5100 is only available in black.

Size Nikon D5100 vs Pentax K-1
Compare D5100 versus K-1 top
Comparison D5100 or K-1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-1 is notably larger (21 percent) than the Nikon D5100. Moreover, the K-1 is substantially heavier (80 percent) than the D5100. It is noteworthy in this context that the K-1 is splash and dust-proof, while the D5100 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 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 D5100 gets 660 shots out of its Nikon EN-EL14 battery, while the K-1 can take 760 images on a single charge of its Pentax D-LI90 power pack.

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 (USD)
Street
Price
1.
 
Nikon D5100 128 mm 97 mm 79 mm 560 g 660 n Apr 2011 749ebay.com
2.
 
Pentax K-1 137 mm 110 mm 86 mm 1010 g 760 Y Feb 2016 1,799ebay.com
3.
 
Canon 5D Mark IV 151 mm 116 mm 76 mm 890 g 900 Y Aug 2016 3,499 amazon.com
4.
 
Canon T2i 129 mm 98 mm 62 mm 530 g 440 n Feb 2010 699ebay.com
5.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 1,999ebay.com
6.
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599ebay.com
7.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599ebay.com
8.
 
Nikon D5000 127 mm 104 mm 80 mm 590 g 510 n Apr 2009 749ebay.com
9.
 
Nikon D5200 129 mm 98 mm 78 mm 555 g 500 n Nov 2012 749ebay.com
10.
 
Nikon D5300 125 mm 98 mm 76 mm 480 g 600 n Oct 2013 799ebay.com
11.
 
Nikon D5500 124 mm 97 mm 70 mm 470 g 820 n Jan 2015 899ebay.com
12.
 
Nikon D5600 124 mm 97 mm 70 mm 465 g 970 n Nov 2016 699ebay.com
13.
 
Nikon D7000 132 mm 105 mm 77 mm 780 g 1050 Y Sep 2010 1,499ebay.com
14.
 
Pentax K-1 II 137 mm 110 mm 86 mm 1010 g 670 Y Feb 2018 1,999 amazon.com
15.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 3,199 amazon.com
16.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
17.
 
Sony NEX-5N 111 mm 59 mm 38 mm 269 g 460 n Aug 2011 699ebay.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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The D5100 was launched at a markedly lower price (by 58 percent) than the K-1, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D5100 features an APS-C sensor and the Pentax K-1 a full frame sensor. The sensor area in the K-1 is 132 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D5100 and Pentax K-1 sensor measures

With 36.2MP, the K-1 offers a higher resolution than the D5100 (16.1MP), but the K-1 nevertheless has marginally larger individual pixels (pixel pitch of 4.88μm versus 4.80μm for the D5100) due to its larger sensor. Moreover, the K-1 is a much more recent model (by 4 years and 10 months) than the D5100, 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 K-1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax K-1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-1 for good quality output (200 dots per inch) amounts to 36.8 x 24.6 inches or 93.5 x 62.4 cm, for very good quality (250 dpi) 29.4 x 19.6 inches or 74.8 x 49.9 cm, and for excellent quality (300 dpi) 24.5 x 16.4 inches or 62.3 x 41.6 cm. The corresponding values for the Nikon D5100 are 24.6 x 16.3 inches or 62.6 x 41.5 cm for good quality, 19.7 x 13.1 inches or 50.1 x 33.2 cm for very good quality, and 16.4 x 10.9 inches or 41.7 x 27.6 cm for excellent quality prints.

Unlike the D5100, 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).

The Nikon D5100 has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax K-1 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.

D5100 versus K-1 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 consideration, the K-1 offers substantially better image quality than the D5100 (overall score 16 points higher). The advantage is based on 1.9 bits higher color depth, 1 EV in additional dynamic range, and 1.5 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.

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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 D5100 APS-C 16.1 4928 32641080/30p23.513.6118380
2.
 
Pentax K-1 Full Frame 36.2 7360 49121080/60i25.414.6328096
3.
 
Canon 5D Mark IV Full Frame 30.1 6720 44804K/30p24.813.6299591
4.
 
Canon T2i APS-C 17.9 5184 34561080/30p22.111.578466
5.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
6.
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
7.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
8.
 
Nikon D5000 APS-C 12.2 4288 2848720/24p22.712.586872
9.
 
Nikon D5200 APS-C 24.0 6000 40001080/60i24.213.9128484
10.
 
Nikon D5300 APS-C 24.0 6000 40001080/60p24.013.9133883
11.
 
Nikon D5500 APS-C 24.0 6000 40001080/60p24.114.0143884
12.
 
Nikon D5600 APS-C 24.0 6000 40001080/60p24.114.0130684
13.
 
Nikon D7000 APS-C 16.1 4928 32641080/24p23.513.9116780
14.
 
Pentax K-1 II Full Frame 36.2 7360 49121080/60i25.114.0269893
15.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
16.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
17.
 
Sony NEX-5N APS-C 16.0 4912 32641080/60i23.612.7107977
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the K-1 provides a faster frame rate than the D5100. It can shoot movie footage at 1080/60i, while the Nikon is limited to 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The D5100 and the K-1 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 K-1 offers a wider field of view (100%) than the one in the D5100 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the K-1 has a higher magnification (0.70x vs 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D5100 and Pentax K-1 along with similar information for a selection of comparators.

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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 D5100optical n3.0 / 921 swivel n 1/4000s 4.0/s Y n
2.
 
Pentax K-1optical Y3.2 / 1037 full-flex n 1/8000s 4.4/s n Y
3.
 
Canon 5D Mark IVoptical Y3.2 / 1620 fixed Y 1/8000s 7.0/s n n
4.
 
Canon T2ioptical n3.0 / 1040 fixed n 1/4000s 3.7/s Y n
5.
 
Nikon D500optical Y3.2 / 2359 tilting Y 1/8000s 10.0/s n n
6.
 
Nikon D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
7.
 
Nikon D3200optical n3.0 / 921 fixed n 1/4000s 4.0/s Y n
8.
 
Nikon D5000optical n2.7 / 230 full-flex n 1/4000s 4.0/s Y n
9.
 
Nikon D5200optical n3.0 / 921 swivel n 1/4000s 5.0/s Y n
10.
 
Nikon D5300optical n3.2 / 1037 swivel n 1/4000s 5.0/s Y n
11.
 
Nikon D5500optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
12.
 
Nikon D5600optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
13.
 
Nikon D7000optical Y3.0 / 921 fixed n 1/8000s 6.0/s Y n
14.
 
Pentax K-1 IIoptical Y3.2 / 1037 full-flex n 1/8000s 4.4/s n Y
15.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
17.
 
Sony NEX-5Noptional n3.0 / 920 tilting Y 1/4000s 10.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The D5100 has one, while the K-1 does not. While the built-in flash of the D5100 is not very powerful, it can at times be useful as a fill-in light.

The D5100 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the K-1 does not have a selfie-screen.

The Nikon D5100 and the Pentax K-1 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.

Concerning the storage of imaging data, both the D5100 and the K-1 write their files to SDXC cards. The K-1 features dual card slots, which can be very useful in case a memory card fails. In contrast, the D5100 only has one slot. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

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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 D5100 and Pentax K-1 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 D5100Ymono / monoY-mini2.0---
2.
 
Pentax K-1Ystereo / monoYYmicro2.0Y--
3.
 
Canon 5D Mark IVYmono / monoYYmini3.0YY-
4.
 
Canon T2iYstereo / -Y-mini2.0---
5.
 
Nikon D500Ystereo / monoYYmini3.0YYY
6.
 
Nikon D3100Ymono / mono--mini2.0---
7.
 
Nikon D3200Ymono / monoY-mini2.0---
8.
 
Nikon D5000Ymono / mono--mini2.0---
9.
 
Nikon D5200Ystereo / monoY-mini2.0---
10.
 
Nikon D5300Ystereo / monoY-mini2.0Y--
11.
 
Nikon D5500Ystereo / monoY-mini2.0Y--
12.
 
Nikon D5600Ystereo / monoY-mini2.0YYY
13.
 
Nikon D7000Ymono / monoY-mini2.0---
14.
 
Pentax K-1 IIYstereo / monoYYmicro2.0Y--
15.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
16.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
17.
 
Sony NEX-5NYstereo / mono--mini2.0---

It is notable that the K-1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D5100 does not provide wifi capability.

Studio photographers will appreciate that the Pentax K-1 (unlike the D5100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the K-1 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the D5100 and the K-1 have been discontinued, but can regularly be found used on ebay. The D5100 was replaced by the Nikon D5200, while the K-1 was followed by the Pentax K-1 II. Further information on the features and operation of the D5100 and K-1 can be found, respectively, in the Nikon D5100 Manual (free pdf) or the online Pentax K-1 Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Nikon D5100 and the Pentax K-1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Nikon D5100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • More compact: Is smaller (128x97mm vs 137x110mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 450g or 45 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (58 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in April 2011).

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Advantages of the Pentax K-1:

  • More detail: Has more megapixels (36.2 vs 16.1MP), which boosts linear resolution by 50%.
  • 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 substantially higher (16 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.9 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 (1.5 stops ISO advantage).
  • Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
  • 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 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.51x).
  • 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 (1/8000s vs 1/4000s) to freeze action.
  • Longer lasting: Gets more shots (760 versus 660) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • 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.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More modern: Reflects 4 years and 10 months of technical progress since the D5100 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the K-1 is the clear winner of the contest (23 : 7 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.

D5100 07:23 K-1

How about other alternatives? Do the specifications of the Nikon D5100 and the Pentax K-1 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 technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the D5100 and the K-1 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.

Expert reviews

This is where reviews by experts come in. 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D51005/5+ +..76/1004.5/54.5/5 Apr 2011 749ebay.com
2.
 
Pentax K-15/5....84/1005/55/5 Feb 2016 1,799ebay.com
3.
 
Canon 5D Mark IV4.5/5+ +4/587/1004.5/54.5/5 Aug 2016 3,499 amazon.com
4.
 
Canon T2i..+ +..77/1004/54.5/5 Feb 2010 699ebay.com
5.
 
Nikon D5005/5+ +4.7/591/1004.5/55/5 Jan 2016 1,999ebay.com
6.
 
Nikon D31005/5+ +..72/1004.5/54.5/5 Aug 2010 599ebay.com
7.
 
Nikon D32005/5+ +..73/1004.5/54.5/5 Apr 2012 599ebay.com
8.
 
Nikon D5000..+ +..75/1004/54.5/5 Apr 2009 749ebay.com
9.
 
Nikon D52004/5+ +..79/1004.5/54.5/5 Nov 2012 749ebay.com
10.
 
Nikon D53004/5+ +..79/1004.5/54.5/5 Oct 2013 799ebay.com
11.
 
Nikon D55005/5+..79/1004.5/54.5/5 Jan 2015 899ebay.com
12.
 
Nikon D56004/5..4/579/1004.5/54/5 Nov 2016 699ebay.com
13.
 
Nikon D70004/5....80/1004.5/54.5/5 Sep 2010 1,499ebay.com
14.
 
Pentax K-1 II....4.5/579/1004.5/54.5/5 Feb 2018 1,999 amazon.com
15.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 3,199 amazon.com
16.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
17.
 
Sony NEX-5N3/5+ +..79/1004.5/54.5/5 Aug 2011 699ebay.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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Check D5100 offers at
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Check K-1 offers at
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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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Nikon D5100 vs Pentax K-1

    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 D5100 Pentax K-1
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax K mount lenses
    Launch Date April 2011 February 2016
    Launch Price USD 749 USD 1,799
    Sensor Specs Nikon D5100 Pentax K-1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.6 x 15.7 mm 35.9 x 24.0 mm
    Sensor Area 370.52 mm2 861.6 mm2
    Sensor Diagonal 28.3 mm 43.2 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 16.1 Megapixels 36.2 Megapixels
    Image Resolution 4928 x 3264 pixels 7360 x 4912 pixels
    Pixel Pitch 4.80 μm 4.88 μm
    Pixel Density 4.34 MP/cm2 4.20 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 100 - 25,600 ISO no Enhancement
    Image Processor EXPEED 2 PRIME IV
    DXO Sensor Quality (score) 80 96
    DXO Color Depth (bits) 23.5 25.4
    DXO Dynamic Range (EV) 13.6 14.6
    DXO Low Light (ISO) 1183 3280
    Screen Specs Nikon D5100 Pentax K-1
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.51x 0.70x
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 921k dots 1037k dots
    LCD Attachment Swivel screen Fully flexible screen
    Shooting Specs Nikon D5100 Pentax K-1
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 4 shutter flaps/s 4.4 shutter flaps/s
    Shutter Life Expectancy100 000 actuations300 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Nikon D5100 Pentax K-1
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Geotagging no internal GPS GPS built-in
    Body Specs Nikon D5100 Pentax K-1
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL14 Pentax D-LI90
    Battery Life (CIPA)660 shots per charge760 shots per charge
    Body Dimensions 128 x 97 x 79 mm
    (5.0 x 3.8 x 3.1 in)
    137 x 110 x 86 mm
    (5.4 x 4.3 x 3.4 in)
    Camera Weight 560 g (19.8 oz) 1010 g (35.6 oz)
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