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Nikon D3100 vs Pentax K-1

The Nikon D3100 and the Pentax K-1 are two digital cameras that were announced, respectively, in August 2010 and February 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D3100) and a full frame (K-1) sensor. The Nikon has a resolution of 14.2 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 D3100 versus Pentax K-1
Nikon D3100 Pentax K-1
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax K mount lenses
14.2 MP, APS-C Sensor 36.2 MP, Full Frame Sensor
1080/24p Video 1080/60i Video
ISO 100-3,200 (100 - 12,800) ISO 100-204,800
Optical viewfinder Optical viewfinder
3.0 LCD, 230k dots 3.2 LCD, 1037k dots
Fixed screen (not touch-sensitive) Fully flexible screen (no touchscreen)
3 shutter flaps per second 4.4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
550 shots per battery charge760 shots per battery charge
124 x 96 x 75 mm, 505 g 137 x 110 x 86 mm, 1010 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 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.

Body comparison

An illustration of the physical size and weight of the Nikon D3100 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 views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.

The D3100 can be obtained in two different colors (black, red), while the K-1 is also available in two color-versions, but different ones (black, silver).

Size Nikon D3100 vs Pentax K-1
Compare D3100 versus K-1 top
Comparison D3100 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 (27 percent) than the Nikon D3100. Moreover, the K-1 is substantially heavier (100 percent) than the D3100. It is noteworthy in this context that the K-1 is splash and dust-proof, while the D3100 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 D3100 gets 550 shots out of its EN-EL14 battery, while the K-1 can take 760 images on a single charge of its D-LI90 power pack.

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, you can use the CAM-parator app to select your camera combination among a large number of options.

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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 D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599i
2.
 
Pentax K-1 137 mm 110 mm 86 mm 1010 g 760 Y Feb 2016 1,799i
3.
 
Canon 5D Mark IV 151 mm 116 mm 76 mm 890 g 900 Y Aug 2016 3,499 i
4.
 
Nikon D5600 124 mm 97 mm 70 mm 465 g 970 n Nov 2016 699 i
5.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 1,999 i
6.
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499i
7.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499i
8.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599i
9.
 
Nikon D5100 128 mm 97 mm 79 mm 560 g 660 n Apr 2011 749i
10.
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599i
11.
 
Nikon D5000 127 mm 104 mm 80 mm 590 g 510 n Apr 2009 749i
12.
 
Nikon D60 126 mm 94 mm 64 mm 522 g 500 n Jan 2008 629i
13.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729i
14.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499i
15.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999 i
16.
 
Pentax K-1 II 137 mm 110 mm 86 mm 1010 g 670 Y Feb 2018 1,999 i
17.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i
Notes: 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 D3100 was launched at a markedly lower price (by 67 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.

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Sensor comparison

The size of the imaging sensor is a crucial determinant 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. 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 D3100 features an APS-C sensor and the Pentax K-1 a full frame sensor. The sensor area in the K-1 is 142 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.

In terms of underlying technology, both cameras are build around CMOS sensors.

Nikon D3100 and Pentax K-1 sensor measures

With 36.2MP, the K-1 offers a higher resolution than the D3100 (14.2MP), but the K-1 has smaller individual pixels (pixel pitch of 4.88μm versus 5.01μm for the D3100). Yet, the K-1 is a much more recent model (by 5 years and 6 months) than the D3100, 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 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 D3100 are 23 x 15.4 inches or 58.5 x 39 cm for good quality, 18.4 x 12.3 inches or 46.8 x 31.2 cm for very good quality, and 15.4 x 10.2 inches or 39 x 26 cm for excellent quality prints.

Unlike the D3100, 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 D3100 has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 100-12800. The corresponding ISO settings for the Pentax K-1 are ISO 100 to ISO 204800 (no boost).

D3100 versus K-1 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 consideration, the K-1 offers substantially better image quality than the D3100 (overall score 29 points higher). The advantage is based on 2.9 bits higher color depth, 3.3 EV in additional dynamic range, and 1.8 stops in additional 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.

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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 D3100 APS-C 14.2 4608 30721080/24p22.511.391967
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.
 
Nikon D5600 APS-C 24.0 6000 40001080/60p24.114.0130684
5.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
6.
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
7.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
8.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
9.
 
Nikon D5100 APS-C 16.1 4928 32641080/30p23.513.6118380
10.
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
11.
 
Nikon D5000 APS-C 12.2 4288 2848720/24p22.712.586872
12.
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
13.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
14.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
15.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
16.
 
Pentax K-1 II Full Frame 36.2 7360 49121080/60i........
17.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792

Many modern cameras cannot only take still pictures, but also record videos. 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 D3100. It can shoot movie footage at 1080/60i, while the Nikon is limited to 1080/24p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The D3100 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 D3100 (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 0.53x), 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 D3100 and Pentax K-1 in connection with corresponding information for a sample of similar cameras.

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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)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Nikon D3100optical n 3.0 230 fixed n 1/4000s 3.0 Y n
2.
 
Pentax K-1optical Y 3.2 1037 full-flex n 1/8000s 4.4 n Y
3.
 
Canon 5D Mark IVoptical Y 3.2 1620 fixed Y 1/8000s 7.0 n n
4.
 
Nikon D5600optical n 3.2 1037 swivel Y 1/4000s 5.0 Y n
5.
 
Nikon D500optical Y 3.2 2359 tilting Y 1/8000s 10.0 n n
6.
 
Nikon D3400optical n 3.0 921 fixed n 1/4000s 5.0 Y n
7.
 
Nikon D3300optical n 3.0 921 fixed n 1/4000s 5.0 Y n
8.
 
Nikon D3200optical n 3.0 921 fixed n 1/4000s 4.0 Y n
9.
 
Nikon D5100optical n 3.0 921 swivel n 1/4000s 4.0 Y n
10.
 
Nikon D3000optical n 3.0 230 fixed n 1/4000s 3.0 Y n
11.
 
Nikon D5000optical n 2.7 230 full-flex n 1/4000s 4.0 Y n
12.
 
Nikon D60optical n 2.5 230 fixed n 1/4000s 3.0 Y n
13.
 
Nikon D40Xoptical n 2.5 230 fixed n 1/4000s 3.0 Y n
14.
 
Nikon D40optical n 2.5 230 fixed n 1/4000s 2.5 Y n
15.
 
Olympus E-M1 II2360 n 3.0 1037 swivel Y 1/8000s 18.0 n Y
16.
 
Pentax K-1 IIoptical Y 3.2 1037 full-flex n 1/8000s 4.4 n Y
17.
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y

One difference between the cameras concerns the presence of an on-board flash. The D3100 has one, while the K-1 does not. While the built-in flash of the D3100 is not very powerful, it can at times be useful as a fill-in light.

The Pentax K-1 has 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 D3100 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 D3100 only has one slot. The K-1 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D3100 cannot take advantage of Ultra High Speed SD cards.

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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 D3100 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
    Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D3100Ymonomono--mini2.0---
2.
 
Pentax K-1YstereomonoYYmicro2.0Y--
3.
 
Canon 5D Mark IVYmonomonoYYmini3.0YY-
4.
 
Nikon D5600YstereomonoY-mini2.0YYY
5.
 
Nikon D500YstereomonoYYmini3.0YYY
6.
 
Nikon D3400Ymonomono--mini2.0--Y
7.
 
Nikon D3300YmonomonoY-mini2.0---
8.
 
Nikon D3200YmonomonoY-mini2.0---
9.
 
Nikon D5100YmonomonoY-mini2.0---
10.
 
Nikon D3000Y-----2.0---
11.
 
Nikon D5000Ymonomono--mini2.0---
12.
 
Nikon D60Y-----2.0---
13.
 
Nikon D40XY-----2.0---
14.
 
Nikon D40Y-----2.0---
15.
 
Olympus E-M1 IIYstereomonoYYmicro3.0Y--
16.
 
Pentax K-1 IIYstereomonoYYmicro2.0Y--
17.
 
Sony A99 IIYstereomonoYYmicro2.0YYY

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 D3100 does not provide wifi capability.

Studio photographers will appreciate that the Pentax K-1 (unlike the D3100) 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 D3100 and the K-1 have been discontinued, but can regularly be found used on eBay. The D3100 was replaced by the Nikon D3200, while the K-1 was followed by the Pentax K-1 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Pentax websites.

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Review summary

So how do things add up? Is there a clear favorite between the Nikon D3100 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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Reasons to prefer the Nikon D3100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More compact: Is smaller (124x96mm vs 137x110mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 505g or 50 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 (67 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2010).

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Advantages of the Pentax K-1:

  • More detail: Has more megapixels (36.2 vs 14.2MP), which boosts linear resolution by 60%.
  • 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 (29 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.9 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (3.3 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.8 stops ISO advantage).
  • Better video: Provides higher movie framerates (1080/60i versus 1080/24p).
  • 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.
  • 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 0.53x).
  • 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 230k dots).
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (4.4 vs 3 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (760 versus 550) 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.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 5 years and 6 months of technical progress since the D3100 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 (28 : 6 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D3100 06:28 K-1

How about other alternatives? Do the specifications of the Nikon D3100 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 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 D3100 or the K-1. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D31005/5+ +72/1004.5/54.5/5 Aug 2010 599i
2.
 
Pentax K-15/5..84/1005/55/5 Feb 2016 1,799i
3.
 
Canon 5D Mark IV4.5/5+ +87/1004.5/54.5/5 Aug 2016 3,499 i
4.
 
Nikon D56004/5..79/1004.5/54/5 Nov 2016 699 i
5.
 
Nikon D5005/5+ +91/1004.5/55/5 Jan 2016 1,999 i
6.
 
Nikon D34004/5+76/1004/54.5/5 Aug 2016 499i
7.
 
Nikon D33003/5+77/1004.5/54.5/5 Jan 2014 499i
8.
 
Nikon D32005/5+ +73/1004.5/54.5/5 Apr 2012 599i
9.
 
Nikon D51005/5+ +76/1004.5/54.5/5 Apr 2011 749i
10.
 
Nikon D3000..+72/1004/54.5/5 Jul 2009 599i
11.
 
Nikon D5000..+ +75/1004/54.5/5 Apr 2009 749i
12.
 
Nikon D60..80/100+ +4/54.5/5 Jan 2008 629i
13.
 
Nikon D40X..79/100+ +4/54/5 Mar 2007 729i
14.
 
Nikon D40..81/100+ +o4.5/5 Nov 2006 499i
15.
 
Olympus E-M1 II5/5+ +85/1004.5/54.5/5 Sep 2016 1,999 i
16.
 
Pentax K-1 II....79/1004.5/54.5/5 Feb 2018 1,999 i
17.
 
Sony A99 II....85/1004.5/54.5/5 Sep 2016 3,199 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

Nikon D3100:
Check Ebay offers
Pentax K-1:
Check Ebay offers

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 use the search menu 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 D3100 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 D3100 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 August 2010 February 2016
    Launch Price USD 599 USD 1,799
    Sensor Specs Nikon D3100 Pentax K-1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.1 x 15.4 mm 35.9 x 24.0 mm
    Sensor Area 355.74 mm2 861.6 mm2
    Sensor Diagonal 27.8 mm 43.2 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 14.2 Megapixels 36.2 Megapixels
    Image Resolution 4608 x 3072 pixels 7360 x 4912 pixels
    Pixel Pitch 5.01 μm 4.88 μm
    Pixel Density 3.98 MP/cm2 4.20 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/24p Video 1080/60i Video
    ISO Setting 100 - 3,200 ISO 100 - 204,800 ISO
    ISO Boost 100 - 12,800 ISO no Enhancement
    Image Processor EXPEED 2 PRIME IV
    DXO Sensor Quality (score) 67 96
    DXO Color Depth (bits) 22.5 25.4
    DXO Dynamic Range (EV) 11.3 14.6
    DXO Low Light (ISO) 919 3280
    Screen Specs Nikon D3100 Pentax K-1
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.53x 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 230k dots 1037k dots
    LCD Attachment Fixed screen Fully flexible screen
    Shooting Specs Nikon D3100 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 3 shutter flaps/s 4.4 shutter flaps/s
    Shutter Life Expectancy100 000 actuations300 000 actuations
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support no UHS-I
    Connectivity Specs Nikon D3100 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 no MIC socket 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 D3100 Pentax K-1
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type EN-EL14 D-LI90
    Battery Life (CIPA)550 shots per charge760 shots per charge
    Body Dimensions 124 x 96 x 75 mm
    (4.9 x 3.8 x 3.0 in)
    137 x 110 x 86 mm
    (5.4 x 4.3 x 3.4 in)
    Camera Weight 505 g (17.8 oz) 1010 g (35.6 oz)

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