Nikon D3100 vs Pentax K-3
The Nikon D3100 and the Pentax K-3 are two digital cameras that were revealed to the public, respectively, in August 2010 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 14.2 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Pentax K-3? 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
The physical size and weight of the Nikon D3100 and the Pentax K-3 are illustrated 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-3 is also available in two color-versions, but different ones (black, silver).
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 (10 percent) than the Nikon D3100. Moreover, the K-3 is substantially heavier (58 percent) than the D3100. It is noteworthy in this context that the K-3 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 Nikon EN-EL14 battery, while the K-3 can take 560 images on a single charge of its Pentax 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, you can use the CAM-parator app to select your camera combination among a large number of options.
# | 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 | 599 | ebay.com | |
2. | Pentax K-3 | 131 mm | 100 mm | 77 mm | 800 g | 560 | Y | Oct 2013 | 1,299 | ebay.com | |
3. | Nikon D7100 | 136 mm | 107 mm | 76 mm | 765 g | 950 | Y | Feb 2013 | 1,199 | ebay.com | |
4. | Nikon D3200 | 125 mm | 96 mm | 77 mm | 505 g | 540 | n | Apr 2012 | 599 | ebay.com | |
5. | Nikon D5100 | 128 mm | 97 mm | 79 mm | 560 g | 660 | n | Apr 2011 | 749 | ebay.com | |
6. | Nikon D7000 | 132 mm | 105 mm | 77 mm | 780 g | 1050 | Y | Sep 2010 | 1,499 | ebay.com | |
7. | Nikon D3000 | 126 mm | 97 mm | 64 mm | 536 g | 500 | n | Jul 2009 | 599 | ebay.com | |
8. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | 749 | ebay.com | |
9. | Nikon D60 | 126 mm | 94 mm | 64 mm | 522 g | 500 | n | Jan 2008 | 629 | ebay.com | |
10. | Nikon D40X | 124 mm | 94 mm | 64 mm | 522 g | 520 | n | Mar 2007 | 729 | ebay.com | |
11. | Nikon D40 | 124 mm | 94 mm | 64 mm | 522 g | 470 | n | Nov 2006 | 499 | ebay.com | |
12. | Pentax KP | 132 mm | 101 mm | 76 mm | 703 g | 390 | Y | Jan 2017 | 1,099 | ebay.com | |
13. | Pentax K-3 II | 131 mm | 100 mm | 77 mm | 800 g | 720 | Y | Apr 2015 | 1,099 | ebay.com | |
14. | Pentax K-5 II | 131 mm | 97 mm | 73 mm | 760 g | 740 | Y | Sep 2012 | 1,099 | ebay.com | |
15. | Sony A77 | 143 mm | 104 mm | 81 mm | 732 g | 470 | Y | Aug 2011 | 1,399 | ebay.com | |
16. | Sony NEX-5N | 111 mm | 59 mm | 38 mm | 269 g | 460 | n | Aug 2011 | 699 | ebay.com | |
17. | Sony NEX-C3 | 110 mm | 60 mm | 33 mm | 225 g | 400 | n | Jun 2011 | 599 | ebay.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 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 D3100 was launched at a markedly lower price (by 54 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
Sensor comparison
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, but their sensors differ slightly in size. The sensor area in the K-3 is 3 percent bigger. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 24.1MP, the K-3 offers a higher resolution than the D3100 (14.2MP), but the K-3 has smaller individual pixels (pixel pitch of 3.90μm versus 5.01μm for the D3100). Yet, the K-3 is a much more recent model (by 3 years and 1 month) 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-3 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Pentax K-3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-3 for good quality output (200 dots per inch) amounts to 30.1 x 20 inches or 76.4 x 50.8 cm, for very good quality (250 dpi) 24.1 x 16 inches or 61.1 x 40.6 cm, and for excellent quality (300 dpi) 20.1 x 13.3 inches or 50.9 x 33.9 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.
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-3 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.
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-3 offers substantially better image quality than the D3100 (overall score 13 points higher). The advantage is based on 1.2 bits higher color depth, 2.1 EV in additional dynamic range, and 0.4 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.
# | 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 | 3072 | 1080/24p | 22.5 | 11.3 | 919 | 67 | |
2. | Pentax K-3 | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.7 | 13.4 | 1216 | 80 | |
3. | Nikon D7100 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.2 | 13.7 | 1256 | 83 | |
4. | Nikon D3200 | APS-C | 24.1 | 6016 | 4000 | 1080/30p | 24.1 | 13.2 | 1131 | 81 | |
5. | Nikon D5100 | APS-C | 16.1 | 4928 | 3264 | 1080/30p | 23.5 | 13.6 | 1183 | 80 | |
6. | Nikon D7000 | APS-C | 16.1 | 4928 | 3264 | 1080/24p | 23.5 | 13.9 | 1167 | 80 | |
7. | Nikon D3000 | APS-C | 10.0 | 3872 | 2592 | none | 22.3 | 11.1 | 563 | 62 | |
8. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
9. | Nikon D60 | APS-C | 10.0 | 3872 | 2592 | none | 22.5 | 11.4 | 562 | 65 | |
10. | Nikon D40X | APS-C | 10.0 | 3872 | 2592 | none | 22.4 | 11.4 | 516 | 63 | |
11. | Nikon D40 | APS-C | 6.0 | 3008 | 2000 | none | 21.0 | 11.0 | 561 | 56 | |
12. | Pentax KP | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.9 | 13.2 | 1699 | 81 | |
13. | Pentax K-3 II | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.6 | 13.6 | 1106 | 80 | |
14. | Pentax K-5 II | APS-C | 16.1 | 4928 | 3264 | 1080/25p | 23.8 | 14.1 | 1235 | 82 | |
15. | Sony A77 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.0 | 13.2 | 801 | 78 | |
16. | Sony NEX-5N | APS-C | 16.0 | 4912 | 3264 | 1080/60i | 23.6 | 12.7 | 1079 | 77 | |
17. | Sony NEX-C3 | APS-C | 16.0 | 4912 | 3264 | 720/30p | 22.7 | 12.2 | 1083 | 73 | |
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the K-3 provides a faster frame rate than the D3100. It can shoot movie footage at 1080/60i, while the Nikon is limited to 1080/24p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a variety of features. The D3100 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 viewfinder in the K-3 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-3 has a higher magnification (0.63x 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-3 in connection with corresponding information for a sample of similar cameras.
# | 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 D3100 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
2. | Pentax K-3 | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | Y | Y | |
3. | Nikon D7100 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 6.0/s | Y | n | |
4. | Nikon D3200 | optical | n | 3.0 / 921 | fixed | n | 1/4000s | 4.0/s | Y | n | |
5. | Nikon D5100 | optical | n | 3.0 / 921 | swivel | n | 1/4000s | 4.0/s | Y | n | |
6. | Nikon D7000 | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 6.0/s | Y | n | |
7. | Nikon D3000 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
8. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
9. | Nikon D60 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
10. | Nikon D40X | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
11. | Nikon D40 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
12. | Pentax KP | optical | n | 3.0 / 921 | tilting | n | 1/6000s | 7.0/s | Y | Y | |
13. | Pentax K-3 II | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | n | Y | |
14. | Pentax K-5 II | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 7.0/s | Y | Y | |
15. | Sony A77 | 2359 | Y | 3.0 / 921 | full-flex | n | 1/8000s | 12.0/s | Y | Y | |
16. | Sony NEX-5N | optional | n | 3.0 / 920 | tilting | Y | 1/4000s | 10.0/s | n | n | |
17. | Sony NEX-C3 | optional | n | 3.0 / 920 | tilting | n | 1/4000s | 5.5/s | n | n | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that differentiates the K-3 and the D3100 is in-body image stabilization (IBIS). The K-3 reduces the risk of handshake-induced blur with all attached lenses, while the D3100 offers no blur reduction with lenses that themselves do not provide optical image stabilization.
The Pentax K-3 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-3 write their files to SDXC cards. The K-3 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-3 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.
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-3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
# | Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
|
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D3100 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
2. | Pentax K-3 | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
3. | Nikon D7100 | Y | stereo / mono | Y | Y | mini | 2.0 | - | - | - | |
4. | Nikon D3200 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
5. | Nikon D5100 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
6. | Nikon D7000 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
7. | Nikon D3000 | Y | - / - | - | - | - | 2.0 | - | - | - | |
8. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
9. | Nikon D60 | Y | - / - | - | - | - | 2.0 | - | - | - | |
10. | Nikon D40X | Y | - / - | - | - | - | 2.0 | - | - | - | |
11. | Nikon D40 | Y | - / - | - | - | - | 2.0 | - | - | - | |
12. | Pentax KP | Y | stereo / mono | Y | - | - | 2.0 | Y | - | - | |
13. | Pentax K-3 II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
14. | Pentax K-5 II | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
15. | Sony A77 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
16. | Sony NEX-5N | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
17. | Sony NEX-C3 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - |
It is notable that the K-3 has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The D3100 lacks such a headphone port.
Studio photographers will appreciate that the Pentax K-3 (unlike the D3100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the D3100 and the K-3 have been discontinued, but can regularly be found used on ebay. The D3100 was replaced by the Nikon D3200, while the K-3 was followed by the Pentax K-3 II. Further information on the features and operation of the D3100 and K-3 can be found, respectively, in the Nikon D3100 Manual (free pdf) or the online Pentax K-3 Manual.
Review summary
So what conclusions can be drawn? Is the Nikon D3100 better than the Pentax K-3 or vice versa? A synthesis of the relative strong points of each of the models is listed below.
Reasons to prefer the Nikon D3100:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Less heavy: Is lighter (by 295g or 37 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in August 2010).
Advantages of the Pentax K-3:
- More detail: Has more megapixels (24.1 vs 14.2MP), which boosts linear resolution by 30%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (13 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.2 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (2.1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.4 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 (0.63x 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).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (8.3 vs 3 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- 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.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- 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 3 years and 1 month of technical progress since the D3100 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the K-3 is the clear winner of the contest (24 : 4 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.
How about other alternatives? Do the specifications of the Nikon D3100 and the Pentax K-3 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 says little about, for example, the shooting experience and imaging performance of the D3100 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.
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.
# | Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price (USD) |
Street Price |
|
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D3100 | 5/5 | + + | .. | 72/100 | 4.5/5 | 4.5/5 | Aug 2010 | 599 | ebay.com | |
2. | Pentax K-3 | 4/5 | .. | .. | 83/100 | 5/5 | 5/5 | Oct 2013 | 1,299 | ebay.com | |
3. | Nikon D7100 | 5/5 | + + | .. | 85/100 | 4.5/5 | 4.5/5 | Feb 2013 | 1,199 | ebay.com | |
4. | Nikon D3200 | 5/5 | + + | .. | 73/100 | 4.5/5 | 4.5/5 | Apr 2012 | 599 | ebay.com | |
5. | Nikon D5100 | 5/5 | + + | .. | 76/100 | 4.5/5 | 4.5/5 | Apr 2011 | 749 | ebay.com | |
6. | Nikon D7000 | 4/5 | .. | .. | 80/100 | 4.5/5 | 4.5/5 | Sep 2010 | 1,499 | ebay.com | |
7. | Nikon D3000 | .. | + | .. | 72/100 | 4/5 | 4.5/5 | Jul 2009 | 599 | ebay.com | |
8. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | 749 | ebay.com | |
9. | Nikon D60 | .. | 80/100 | .. | + + | 4/5 | 4.5/5 | Jan 2008 | 629 | ebay.com | |
10. | Nikon D40X | .. | 79/100 | .. | + + | 4/5 | 4/5 | Mar 2007 | 729 | ebay.com | |
11. | Nikon D40 | .. | 81/100 | .. | + + | o | 4.5/5 | Nov 2006 | 499 | ebay.com | |
12. | Pentax KP | 4/5 | .. | 3/5 | 82/100 | 5/5 | 4.5/5 | Jan 2017 | 1,099 | ebay.com | |
13. | Pentax K-3 II | 4.5/5 | .. | .. | .. | 5/5 | 5/5 | Apr 2015 | 1,099 | ebay.com | |
14. | Pentax K-5 II | 5/5 | .. | .. | 80/100 | 5/5 | 4.5/5 | Sep 2012 | 1,099 | ebay.com | |
15. | Sony A77 | 5/5 | 91/100 | .. | 81/100 | .. | 5/5 | Aug 2011 | 1,399 | ebay.com | |
16. | Sony NEX-5N | 3/5 | + + | .. | 79/100 | 4.5/5 | 4.5/5 | Aug 2011 | 699 | ebay.com | |
17. | Sony NEX-C3 | 3/5 | + + | .. | 74/100 | 4.5/5 | 4/5 | Jun 2011 | 599 | ebay.com | |
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. |
The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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 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.
- Canon 500D vs Pentax K-3
- Fujifilm X-H1 vs Nikon D3100
- Fujifilm X-T1 vs Pentax K-3
- Fujifilm X100S vs Nikon D3100
- Nikon D3100 vs Olympus E-620
- Nikon D3100 vs Panasonic ZS80
- Nikon D3100 vs Ricoh GR III
- Nikon D3100 vs Sony A7 III
- Nikon D6 vs Pentax K-3
- Panasonic GF3 vs Pentax K-3
- Pentax K-3 vs Pentax K-3 III
- Pentax K-3 vs Sony NEX-C3
Specifications: Nikon D3100 vs Pentax K-3
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 Model | Nikon D3100 | Pentax K-3 |
---|---|---|
Camera Type | Digital single lens reflex | Digital single lens reflex |
Camera Lens | Nikon F mount lenses | Pentax K mount lenses |
Launch Date | August 2010 | October 2013 |
Launch Price | USD 599 | USD 1,299 |
Sensor Specs | Nikon D3100 | Pentax K-3 |
Sensor Technology | CMOS | CMOS |
Sensor Format | APS-C Sensor | APS-C Sensor |
Sensor Size | 23.1 x 15.4 mm | 23.5 x 15.6 mm |
Sensor Area | 355.74 mm2 | 366.6 mm2 |
Sensor Diagonal | 27.8 mm | 28.2 mm |
Crop Factor | 1.5x | 1.5x |
Sensor Resolution | 14.2 Megapixels | 24.1 Megapixels |
Image Resolution | 4608 x 3072 pixels | 6016 x 4000 pixels |
Pixel Pitch | 5.01 μm | 3.90 μm |
Pixel Density | 3.98 MP/cm2 | 6.56 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 - 51,200 ISO |
ISO Boost | 100 - 12,800 ISO | no Enhancement |
Image Processor | EXPEED 2 | PRIME III |
DXO Sensor Quality (score) | 67 | 80 |
DXO Color Depth (bits) | 22.5 | 23.7 |
DXO Dynamic Range (EV) | 11.3 | 13.4 |
DXO Low Light (ISO) | 919 | 1216 |
Screen Specs | Nikon D3100 | Pentax K-3 |
Viewfinder Type | Optical viewfinder | Optical viewfinder |
Viewfinder Field of View | 95% | 100% |
Viewfinder Magnification | 0.53x | 0.63x |
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 | Fixed screen |
Shooting Specs | Nikon D3100 | Pentax K-3 |
Focus System | Phase-detect AF | Phase-detect AF |
Manual Focusing Aid | no Peaking Feature | Focus Peaking |
Max Shutter Speed (mechanical) | 1/4000s | 1/8000s |
Continuous Shooting | 3 shutter flaps/s | 8.3 shutter flaps/s |
Shutter Life Expectancy | 100 000 actuations | 200 000 actuations |
Time-Lapse Photography | no Intervalometer | Intervalometer built-in |
Image Stabilization | Lens stabilization only | In-body stabilization |
Fill Flash | Built-in Flash | Built-in Flash |
Storage Medium | SDXC cards | SDXC cards |
Single or Dual Card Slots | Single card slot | Dual card slots |
UHS card support | no | UHS-I |
Connectivity Specs | Nikon D3100 | Pentax K-3 |
External Flash | Hotshoe | Hotshoe |
Studio Flash | no PC Sync | 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 |
Body Specs | Nikon D3100 | Pentax K-3 |
Environmental Sealing | not weather sealed | Weathersealed body |
Battery Type | Nikon EN-EL14 | Pentax D-LI90 |
Battery Life (CIPA) | 550 shots per charge | 560 shots per charge |
Body Dimensions |
124 x 96 x 75 mm (4.9 x 3.8 x 3.0 in) |
131 x 100 x 77 mm (5.2 x 3.9 x 3.0 in) |
Camera Weight | 505 g (17.8 oz) | 800 g (28.2 oz) |
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