Nikon D3100 vs Sony NEX-7
The Nikon D3100 and the Sony Alpha NEX-7 are two digital cameras that were announced, respectively, in August 2010 and August 2011. The D3100 is a DSLR, while the NEX-7 is a mirrorless interchangeable lens camera. Both cameras are equipped with an APS-C sensor. The Nikon has a resolution of 14.2 megapixels, whereas the Sony provides 24 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 Sony Alpha NEX-7? 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 Sony NEX-7 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 measures are rounded to the nearest millimeter.
The D3100 can be obtained in two different colors (black, red), while the NEX-7 is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony NEX-7 is considerably smaller (32 percent) than the Nikon D3100. Moreover, the NEX-7 is markedly lighter (21 percent) than the D3100. In this context, it is worth noting that neither the D3100 nor the NEX-7 are weather-sealed.
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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D3100) and the Sony E-Mount Lens Catalog (NEX-7). Mirrorless cameras, such as the NEX-7, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
Concerning battery life, the D3100 gets 550 shots out of its Nikon EN-EL14 battery, while the NEX-7 can take 430 images on a single charge of its Sony NP-FW50 power pack.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
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. | Sony NEX-7 | 120 mm | 67 mm | 43 mm | 400 g | 430 | n | Aug 2011 | 1,349 | ebay.com | |
3. | Fujifilm X100 | 126 mm | 75 mm | 54 mm | 445 g | 300 | n | Sep 2010 | 1,199 | ebay.com | |
4. | Nikon D40 | 124 mm | 94 mm | 64 mm | 522 g | 470 | n | Nov 2006 | 499 | ebay.com | |
5. | Nikon D40X | 124 mm | 94 mm | 64 mm | 522 g | 520 | n | Mar 2007 | 729 | ebay.com | |
6. | Nikon D60 | 126 mm | 94 mm | 64 mm | 522 g | 500 | n | Jan 2008 | 629 | ebay.com | |
7. | Nikon D3000 | 126 mm | 97 mm | 64 mm | 536 g | 500 | n | Jul 2009 | 599 | ebay.com | |
8. | Nikon D3200 | 125 mm | 96 mm | 77 mm | 505 g | 540 | n | Apr 2012 | 599 | ebay.com | |
9. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | 749 | ebay.com | |
10. | Nikon D5100 | 128 mm | 97 mm | 79 mm | 560 g | 660 | n | Apr 2011 | 749 | ebay.com | |
11. | Nikon D7000 | 132 mm | 105 mm | 77 mm | 780 g | 1050 | Y | Sep 2010 | 1,499 | ebay.com | |
12. | Sony A3000 | 128 mm | 91 mm | 85 mm | 411 g | 470 | n | Aug 2013 | 329 | ebay.com | |
13. | Sony A6000 | 120 mm | 67 mm | 45 mm | 344 g | 360 | n | Feb 2014 | 599 | ebay.com | |
14. | Sony A6400 | 120 mm | 67 mm | 50 mm | 403 g | 410 | Y | Jan 2019 | 899 | amazon.com | |
15. | Sony NEX-5N | 111 mm | 59 mm | 38 mm | 269 g | 460 | n | Aug 2011 | 699 | ebay.com | |
16. | Sony NEX-C3 | 110 mm | 60 mm | 33 mm | 225 g | 400 | n | Jun 2011 | 599 | ebay.com | |
17. | Sony RX1 | 113 mm | 65 mm | 70 mm | 482 g | 270 | n | Sep 2012 | 2,799 | 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 56 percent) than the NEX-7, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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. 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 an APS-C sensor, but their sensors differ slightly in size. The sensor area in the NEX-7 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 24MP, the NEX-7 offers a higher resolution than the D3100 (14.2MP), but the NEX-7 has smaller individual pixels (pixel pitch of 3.90μm versus 5.01μm for the D3100). Yet, the NEX-7 is a somewhat more recent model (by 1 year) than the D3100, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.
The resolution advantage of the Sony NEX-7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the NEX-7 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 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 Sony Alpha NEX-7 are ISO 100 to ISO 16000 (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.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 NEX-7 offers substantially better image quality than the D3100 (overall score 14 points higher). The advantage is based on 1.6 bits higher color depth, 2.1 EV in additional dynamic range, and 0.1 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
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. | Sony NEX-7 | APS-C | 24.0 | 6000 | 4000 | 1080/60i | 24.1 | 13.4 | 1016 | 81 | |
3. | Fujifilm X100 | APS-C | 12.2 | 4288 | 2848 | 720/30p | 22.9 | 12.4 | 1001 | 73 | |
4. | Nikon D40 | APS-C | 6.0 | 3008 | 2000 | none | 21.0 | 11.0 | 561 | 56 | |
5. | Nikon D40X | APS-C | 10.0 | 3872 | 2592 | none | 22.4 | 11.4 | 516 | 63 | |
6. | Nikon D60 | APS-C | 10.0 | 3872 | 2592 | none | 22.5 | 11.4 | 562 | 65 | |
7. | Nikon D3000 | APS-C | 10.0 | 3872 | 2592 | none | 22.3 | 11.1 | 563 | 62 | |
8. | Nikon D3200 | APS-C | 24.1 | 6016 | 4000 | 1080/30p | 24.1 | 13.2 | 1131 | 81 | |
9. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
10. | Nikon D5100 | APS-C | 16.1 | 4928 | 3264 | 1080/30p | 23.5 | 13.6 | 1183 | 80 | |
11. | Nikon D7000 | APS-C | 16.1 | 4928 | 3264 | 1080/24p | 23.5 | 13.9 | 1167 | 80 | |
12. | Sony A3000 | APS-C | 19.8 | 5456 | 3632 | 1080/60i | 23.7 | 12.8 | 1068 | 78 | |
13. | Sony A6000 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.1 | 13.1 | 1347 | 82 | |
14. | Sony A6400 | APS-C | 24.0 | 6000 | 4000 | 4K/30p | 24.0 | 13.6 | 1431 | 83 | |
15. | Sony NEX-5N | APS-C | 16.0 | 4912 | 3264 | 1080/60i | 23.6 | 12.7 | 1079 | 77 | |
16. | Sony NEX-C3 | APS-C | 16.0 | 4912 | 3264 | 720/30p | 22.7 | 12.2 | 1083 | 73 | |
17. | Sony RX1 | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 25.1 | 14.3 | 2534 | 93 |
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 NEX-7 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 range of features. For example, the NEX-7 has an electronic viewfinder (2359k dots), while the D3100 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the NEX-7 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 NEX-7 has a higher magnification (0.73x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Nikon D3100, the Sony NEX-7, and comparable 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. | Sony NEX-7 | 2359 | n | 3.0 / 921 | tilting | n | 1/4000s | 10.0/s | Y | n | |
3. | Fujifilm X100 | 1440 | n | 2.8 / 460 | fixed | n | 1/4000s | 5.0/s | Y | n | |
4. | Nikon D40 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
5. | Nikon D40X | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
6. | Nikon D60 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
7. | Nikon D3000 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
8. | Nikon D3200 | optical | n | 3.0 / 921 | fixed | n | 1/4000s | 4.0/s | Y | n | |
9. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
10. | Nikon D5100 | optical | n | 3.0 / 921 | swivel | n | 1/4000s | 4.0/s | Y | n | |
11. | Nikon D7000 | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 6.0/s | Y | n | |
12. | Sony A3000 | 202 | n | 3.0 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
13. | Sony A6000 | 1440 | n | 3.0 / 922 | tilting | n | 1/4000s | 11.0/s | Y | n | |
14. | Sony A6400 | 2359 | n | 3.0 / 922 | tilting | Y | 1/4000s | 11.0/s | Y | n | |
15. | Sony NEX-5N | optional | n | 3.0 / 920 | tilting | Y | 1/4000s | 10.0/s | n | n | |
16. | Sony NEX-C3 | optional | n | 3.0 / 920 | tilting | n | 1/4000s | 5.5/s | n | n | |
17. | Sony RX1 | optional | n | 3.0 / 1229 | fixed | n | 1/4000s | 5.0/s | Y | n | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
The D3100 writes its imaging data to SDXC cards, while the NEX-7 uses SDXC or Memory Stick PRO Duo 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 Sony Alpha NEX-7 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. | Sony NEX-7 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
3. | Fujifilm X100 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
4. | Nikon D40 | Y | - / - | - | - | - | 2.0 | - | - | - | |
5. | Nikon D40X | Y | - / - | - | - | - | 2.0 | - | - | - | |
6. | Nikon D60 | Y | - / - | - | - | - | 2.0 | - | - | - | |
7. | Nikon D3000 | Y | - / - | - | - | - | 2.0 | - | - | - | |
8. | Nikon D3200 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
9. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
10. | Nikon D5100 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
11. | Nikon D7000 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
12. | Sony A3000 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
13. | Sony A6000 | Y | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
14. | Sony A6400 | Y | stereo / mono | Y | - | micro | 2.0 | Y | Y | Y | |
15. | Sony NEX-5N | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
16. | Sony NEX-C3 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
17. | Sony RX1 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - |
It is notable that the NEX-7 has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The D3100 does not feature such a mic input.
Both the D3100 and the NEX-7 have been discontinued, but can regularly be found used on ebay. The D3100 was replaced by the Nikon D3200, while the NEX-7 does not have a direct successor. Further information on the features and operation of the D3100 and NEX-7 can be found, respectively, in the Nikon D3100 Manual (free pdf) or the online Sony NEX-7 Manual.
Review summary
So how do things add up? Which of the two cameras – the Nikon D3100 or the Sony NEX-7 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Nikon D3100:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (550 versus 430) on a single battery charge.
- More affordable: Was introduced into a lower priced category (56 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in August 2010).
Reasons to prefer the Sony Alpha NEX-7:
- More detail: Has more megapixels (24 vs 14.2MP), which boosts linear resolution by 30%.
- Better image quality: Scores substantially higher (14 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.6 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (2.1 EV of extra DR).
- Better video: Provides higher movie framerates (1080/60i versus 1080/24p).
- Better sound: Can connect to an external microphone for higher quality sound recording.
- More framing info: Has an electronic viewfinder that displays shooting data.
- 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 (0.73x vs 0.53x).
- More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster burst: Shoots at higher frequency (10 vs 3 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (120x67mm vs 124x96mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 105g or 21 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More modern: Was introduced somewhat (1 year) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the NEX-7 is the clear winner of the contest (16 : 4 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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.
How about other alternatives? Do the specifications of the Nikon D3100 and the Sony NEX-7 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the D3100 or the NEX-7 perform in practice. 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 why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major 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. | Sony NEX-7 | 5/5 | + + | .. | 81/100 | 4.5/5 | 5/5 | Aug 2011 | 1,349 | ebay.com | |
3. | Fujifilm X100 | 3/5 | .. | .. | 75/100 | 4/5 | 5/5 | Sep 2010 | 1,199 | ebay.com | |
4. | Nikon D40 | .. | 81/100 | .. | + + | o | 4.5/5 | Nov 2006 | 499 | ebay.com | |
5. | Nikon D40X | .. | 79/100 | .. | + + | 4/5 | 4/5 | Mar 2007 | 729 | ebay.com | |
6. | Nikon D60 | .. | 80/100 | .. | + + | 4/5 | 4.5/5 | Jan 2008 | 629 | ebay.com | |
7. | Nikon D3000 | .. | + | .. | 72/100 | 4/5 | 4.5/5 | Jul 2009 | 599 | ebay.com | |
8. | Nikon D3200 | 5/5 | + + | .. | 73/100 | 4.5/5 | 4.5/5 | Apr 2012 | 599 | ebay.com | |
9. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | 749 | ebay.com | |
10. | Nikon D5100 | 5/5 | + + | .. | 76/100 | 4.5/5 | 4.5/5 | Apr 2011 | 749 | ebay.com | |
11. | Nikon D7000 | 4/5 | .. | .. | 80/100 | 4.5/5 | 4.5/5 | Sep 2010 | 1,499 | ebay.com | |
12. | Sony A3000 | 3/5 | + | .. | .. | 4/5 | 4/5 | Aug 2013 | 329 | ebay.com | |
13. | Sony A6000 | 5/5 | + | 4.5/5 | 80/100 | 4.5/5 | 5/5 | Feb 2014 | 599 | ebay.com | |
14. | Sony A6400 | 4/5 | + | 4/5 | 85/100 | 4.5/5 | 4/5 | Jan 2019 | 899 | amazon.com | |
15. | Sony NEX-5N | 3/5 | + + | .. | 79/100 | 4.5/5 | 4.5/5 | Aug 2011 | 699 | ebay.com | |
16. | Sony NEX-C3 | 3/5 | + + | .. | 74/100 | 4.5/5 | 4/5 | Jun 2011 | 599 | ebay.com | |
17. | Sony RX1 | 5/5 | .. | .. | 79/100 | 4/5 | 4.5/5 | Sep 2012 | 2,799 | ebay.com | |
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. |
Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and 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 would like to check on the differences and similarities of other camera models, just use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 7D vs Nikon D3100
- Canon G1 X Mark II vs Nikon D3100
- Canon SX710 vs Nikon D3100
- Canon T1i vs Sony NEX-7
- Nikon D3100 vs Nikon Z fc
- Nikon D3100 vs Panasonic FZ82
- Nikon D3100 vs Panasonic GF3
- Nikon D7500 vs Sony NEX-7
- Nikon D80 vs Sony NEX-7
- Olympus E-500 vs Sony NEX-7
- Olympus E-PL3 vs Sony NEX-7
- Ricoh GR II vs Sony NEX-7
Specifications: Nikon D3100 vs Sony NEX-7
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 | Sony NEX-7 |
---|---|---|
Camera Type | Digital single lens reflex | Mirrorless system camera |
Camera Lens | Nikon F mount lenses | Sony E mount lenses |
Launch Date | August 2010 | August 2011 |
Launch Price | USD 599 | USD 1,349 |
Sensor Specs | Nikon D3100 | Sony NEX-7 |
Sensor Technology | CMOS | CMOS |
Sensor Format | APS-C Sensor | APS-C Sensor |
Sensor Size | 23.1 x 15.4 mm | 23.4 x 15.6 mm |
Sensor Area | 355.74 mm2 | 365.04 mm2 |
Sensor Diagonal | 27.8 mm | 28.1 mm |
Crop Factor | 1.5x | 1.5x |
Sensor Resolution | 14.2 Megapixels | 24 Megapixels |
Image Resolution | 4608 x 3072 pixels | 6000 x 4000 pixels |
Pixel Pitch | 5.01 μm | 3.90 μm |
Pixel Density | 3.98 MP/cm2 | 6.57 MP/cm2 |
Moiré control | Anti-Alias filter | Anti-Alias filter |
Movie Capability | 1080/24p Video | 1080/60i Video |
ISO Setting | 100 - 3,200 ISO | 100 - 16,000 ISO |
ISO Boost | 100 - 12,800 ISO | no Enhancement |
Image Processor | EXPEED 2 | BIONZ |
DXO Sensor Quality (score) | 67 | 81 |
DXO Color Depth (bits) | 22.5 | 24.1 |
DXO Dynamic Range (EV) | 11.3 | 13.4 |
DXO Low Light (ISO) | 919 | 1016 |
Screen Specs | Nikon D3100 | Sony NEX-7 |
Viewfinder Type | Optical viewfinder | Electronic viewfinder |
Viewfinder Field of View | 95% | 100% |
Viewfinder Magnification | 0.53x | 0.73x |
Viewfinder Resolution | 2359k dots | |
LCD Framing | Live View | Live View |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 230k dots | 921k dots |
LCD Attachment | Fixed screen | Tilting screen |
Shooting Specs | Nikon D3100 | Sony NEX-7 |
Focus System | Phase-detect AF | Contrast-detect AF |
Manual Focusing Aid | no Peaking Feature | Focus Peaking |
Max Shutter Speed (mechanical) | 1/4000s | 1/4000s |
Continuous Shooting | 3 shutter flaps/s | 10 shutter flaps/s |
Shutter Life Expectancy | 100 000 actuations | 150 000 actuations |
Fill Flash | Built-in Flash | Built-in Flash |
Storage Medium | SDXC cards | MS or SDXC cards |
Single or Dual Card Slots | Single card slot | Single card slot |
UHS card support | no | no |
Connectivity Specs | Nikon D3100 | Sony NEX-7 |
External Flash | Hotshoe | Hotshoe |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | mini HDMI | mini HDMI |
Microphone Port | no MIC socket | External MIC port |
Wifi Support | no Wifi | no Wifi |
Body Specs | Nikon D3100 | Sony NEX-7 |
Battery Type | Nikon EN-EL14 | Sony NP-FW50 |
Battery Life (CIPA) | 550 shots per charge | 430 shots per charge |
Body Dimensions |
124 x 96 x 75 mm (4.9 x 3.8 x 3.0 in) |
120 x 67 x 43 mm (4.7 x 2.6 x 1.7 in) |
Camera Weight | 505 g (17.8 oz) | 400 g (14.1 oz) |
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