Nikon D3100 vs Z7
The Nikon D3100 and the Nikon Z7 are two digital cameras that were officially introduced, respectively, in August 2010 and August 2018. The D3100 is a DSLR, while the Z7 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D3100) and a full frame (Z7) sensor. The D3100 has a resolution of 14.2 megapixels, whereas the Z7 provides 45.4 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Nikon D3100||Nikon Z7|
|Digital single lens reflex||Mirrorless system camera|
|Nikon F mount lenses||Nikon Z mount lenses|
|14.2 MP, APS-C Sensor||45.4 MP, Full Frame Sensor|
|1080/24p Video||4K/30p Video|
|ISO 100-3200 (100-12800)||ISO 64-25600 (32-102400)|
|Optical viewfinder||Electronic viewfinder (3690k dots)|
|3.0" LCD, 230k dots||3.2" LCD, 2100k dots|
|Fixed screen (not touch-sensitive)||Tilting touchscreen|
|3 shutter flaps per second||9 shutter flaps per second|
|Lens stabilization only||In-body stabilization|
|Not weather sealed||Weathersealed body|
|550 shots per battery charge||330 shots per battery charge|
|124 x 96 x 75 mm, 505 g||134 x 101 x 67 mm, 675 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Nikon Z7? 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.
The side-by-side display below illustrates the physical size and weight of the Nikon D3100 and the Nikon Z7. 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 D3100 can be obtained in two different colors (black, red), while the Z7 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 Nikon Z7 is notably larger (14 percent) than the Nikon D3100. Moreover, the Z7 is markedly heavier (34 percent) than the D3100. It is noteworthy in this context that the Z7 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 Z7 can take 330 images on a single charge of its EN-EL15b power pack. The power pack in the Z7 can be charged via the USB port, which can be very convenient when travelling.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Nikon D3100»||4.9 in||3.8 in||3.0 in||17.8 oz||550||n||Aug 2010||599||-||Nikon D3100|
|Nikon Z7«||5.3 in||4.0 in||2.6 in||23.8 oz||330||Y||Aug 2018||3,399||Nikon Z7|
|Nikon D850« »||5.7 in||4.9 in||3.1 in||35.5 oz||1840||Y||Jul 2017||3,299||Nikon D850|
|Nikon D3200« »||4.9 in||3.8 in||3.0 in||17.8 oz||540||n||Apr 2012||599||-||Nikon D3200|
|Nikon D5100« »||5.0 in||3.8 in||3.1 in||19.8 oz||660||n||Apr 2011||749||-||Nikon D5100|
|Nikon D7000« »||5.2 in||4.1 in||3.0 in||27.5 oz||1050||Y||Sep 2010||1,499||-||Nikon D7000|
|Nikon D3000« »||5.0 in||3.8 in||2.5 in||18.9 oz||500||n||Jul 2009||599||-||Nikon D3000|
|Nikon D5000« »||5.0 in||4.1 in||3.1 in||20.8 oz||510||n||Apr 2009||749||-||Nikon D5000|
|Nikon D60« »||5.0 in||3.7 in||2.5 in||18.4 oz||500||n||Jan 2008||629||-||Nikon D60|
|Nikon D40X« »||4.9 in||3.7 in||2.5 in||18.4 oz||520||n||Mar 2007||729||-||Nikon D40X|
|Nikon D40« »||4.9 in||3.7 in||2.5 in||18.4 oz||470||n||Nov 2006||499||-||Nikon D40|
|Panasonic S1R« »||5.9 in||4.3 in||3.8 in||35.8 oz||380||Y||Feb 2019||3,699||Panasonic S1R|
|Sony A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499||Sony A9|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||-||Sony A7R II|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|Sony NEX-5N« »||4.4 in||2.3 in||1.5 in||9.5 oz||460||n||Aug 2011||699||-||Sony NEX-5N|
|Sony NEX-C3« »||4.3 in||2.4 in||1.3 in||7.9 oz||400||n||Jun 2011||599||-||Sony NEX-C3|
|Note: Measurements and pricing do not include easily detachable parts, such as 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 82 percent) than the Z7, 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.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Nikon D3100 features an APS-C sensor and the Nikon Z7 a full frame sensor. The sensor area in the Z7 is 141 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.
Technology-wise, the Z7 uses a more advanced image processing engine (EXPEED 6) than the D3100 (EXPEED 2), with benefits for noise reduction, color accuracy, and processing speed.
With 45.4MP, the Z7 offers a higher resolution than the D3100 (14.2MP), but the Z7 has smaller individual pixels (pixel pitch of 4.35μm versus 5.01μm for the D3100). Yet, the Z7 is a much more recent model (by 8 years) 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 Z7 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Nikon Z7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Z7 for good quality output (200 dots per inch) amounts to 41.3 x 27.5 inch or 104.9 x 69.9 cm, for very good quality (250 dpi) 33 x 22 inch or 83.9 x 55.9 cm, and for excellent quality (300 dpi) 27.5 x 18.3 inch or 69.9 x 46.6 cm. The corresponding values for the Nikon D3100 are 23 x 15.4 inch or 58.5 x 39 cm for good quality, 18.4 x 12.3 inch or 46.8 x 31.2 cm for very good quality, and 15.4 x 10.2 inch or 39 x 26 cm for excellent quality prints.
The Z7 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
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 Nikon Z7 are ISO 64 to ISO 25600, with the possibility to increase the ISO range to 32-102400.
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 Z7 offers substantially better image quality than the D3100 (overall score 32 points higher). The advantage is based on 3.8 bits higher color depth, 3.3 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.
|Nikon D3100»||APS-C||14.2||4608||3072||1080/24p||22.5||11.3||919||67||Nikon D3100|
|Nikon Z7«||Full Frame||45.4||8256||5504||4K/30p||26.3||14.6||2668||99||Nikon Z7|
|Nikon D850« »||Full Frame||45.4||8256||5504||4K/30p||26.4||14.8||2660||100||Nikon D850|
|Nikon D3200« »||APS-C||24.1||6016||4000||1080/30p||24.1||13.2||1131||81||Nikon D3200|
|Nikon D5100« »||APS-C||16.1||4928||3264||1080/30p||23.5||13.6||1183||80||Nikon D5100|
|Nikon D7000« »||APS-C||16.1||4928||3264||10800/24p||23.5||13.9||1167||80||Nikon D7000|
|Nikon D3000« »||APS-C||10.0||3872||2592||-||22.3||11.1||563||62||Nikon D3000|
|Nikon D5000« »||APS-C||12.2||4288||2848||720/24p||22.7||12.5||868||72||Nikon D5000|
|Nikon D60« »||APS-C||10.0||3872||2592||-||22.5||11.4||562||65||Nikon D60|
|Nikon D40X« »||APS-C||10.0||3872||2592||-||22.4||11.4||516||63||Nikon D40X|
|Nikon D40« »||APS-C||6.0||3008||2000||-||21.0||11.0||561||56||Nikon D40|
|Panasonic S1R« »||Full Frame||46.7||8368||5584||4K/60p||26.4||14.1||3525||100||Panasonic S1R|
|Sony A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92||Sony A9|
|Sony A7R II« »||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98||Sony A7R II|
|Sony A7S II« »||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|Sony NEX-5N« »||APS-C||16.0||4912||3264||1080/60i||23.6||12.7||1079||77||Sony NEX-5N|
|Sony NEX-C3« »||APS-C||16.0||4912||3264||720/30p||22.7||12.2||1083||73||Sony NEX-C3|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the Z7 provides a better video resolution than the D3100. It can shoot movie footage at 4K/30p, while the D3100 is limited to 1080/24p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the Z7 has an electronic viewfinder (3690k 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 Z7 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 Z7 has a higher magnification (0.80x 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 Nikon Z7, and comparable cameras.
|Nikon D3100»||optical||n||3.0||230||fixed||n||1/4000s||3.0||Y||n||Nikon D3100|
|Nikon Z7«||3690||Y||3.2||2100||tilting||Y||1/8000s||9.0||n||Y||Nikon Z7|
|Nikon D850« »||optical||Y||3.2||2359||tilting||Y||1/8000s||9.0||n||n||Nikon D850|
|Nikon D3200« »||optical||n||3.0||921||fixed||n||1/4000s||4.0||Y||n||Nikon D3200|
|Nikon D5100« »||optical||n||3.0||921||swivel||n||1/4000s||4.0||Y||n||Nikon D5100|
|Nikon D7000« »||optical||Y||3.0||921||fixed||n||1/8000s||6.0||Y||n||Nikon D7000|
|Nikon D3000« »||optical||n||3.0||230||fixed||n||1/4000s||3.0||Y||n||Nikon D3000|
|Nikon D5000« »||optical||n||2.7||230||full-flex||n||1/4000s||4.0||Y||n||Nikon D5000|
|Nikon D60« »||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Nikon D60|
|Nikon D40X« »||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Nikon D40X|
|Nikon D40« »||optical||n||2.5||230||fixed||n||1/4000s||2.5||Y||n||Nikon D40|
|Panasonic S1R« »||5760||Y||3.2||2100||full-flex||Y||1/8000s||9.0||n||Y||Panasonic S1R|
|Sony A9« »||3686||n||3.0||1440||tilting||Y||1/8000s||20.0||n||Y||Sony A9|
|Sony A7R II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7R II|
|Sony A7S II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7S II|
|Sony NEX-5N« »||-||n||3.0||920||tilting||Y||1/4000s||10.0||n||n||Sony NEX-5N|
|Sony NEX-C3« »||-||n||3.0||920||tilting||n||1/4000s||5.5||n||n||Sony NEX-C3|
One difference between the cameras concerns the presence of an on-board flash. The D3100 has one, while the Z7 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 Nikon Z7 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.
The D3100 writes its imaging data to SDXC cards, while the Z7 uses XQD cards.
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 Nikon Z7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Nikon D3100»||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D3100|
|Nikon Z7«||Y||stereo||mono||Y||Y||micro||3.1||Y||-||Y||Nikon Z7|
|Nikon D850« »||Y||stereo||mono||Y||Y||mini||3.0||Y||Y||Y||Nikon D850|
|Nikon D3200« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D3200|
|Nikon D5100« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D5100|
|Nikon D7000« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D7000|
|Nikon D3000« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D3000|
|Nikon D5000« »||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D5000|
|Nikon D60« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D60|
|Nikon D40X« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D40X|
|Nikon D40« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D40|
|Panasonic S1R« »||Y||stereo||mono||Y||Y||full||3.1||Y||-||Y||Panasonic S1R|
|Sony A9« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A9|
|Sony A7R II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R II|
|Sony A7S II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|Sony NEX-5N« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Sony NEX-5N|
|Sony NEX-C3« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Sony NEX-C3|
It is notable that the Z7 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 offer wifi capability.
The Z7 is a recent model that features in the current product line-up of Nikon. In contrast, the D3100 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the D3100 was succeeded by the Nikon D3200. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon website.
So what conclusions can be drawn? Which of the two cameras – the Nikon D3100 or the Nikon Z7 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Nikon D3100:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- More compact: Is smaller (124x96mm vs 134x101mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 170g or 25 percent) and hence easier to carry around.
- Longer lasting: Can take more shots (550 versus 330) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (82 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in August 2010).
Arguments in favor of the Nikon Z7:
- More detail: Has more megapixels (45.4 vs 14.2MP), which boosts linear resolution by 79%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (32 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (3.8 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 (1.5 stops ISO advantage).
- Better jpgs: Has a more modern image processing engine (EXPEED 6 vs EXPEED 2).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/24p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- 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 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 (0.80x 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 (2100k vs 230k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (9 vs 3 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Easier travel charging: Can be conveniently charged via its USB port.
- 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.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More modern: Reflects 8 years of technical progress since the D3100 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the Z7 is the clear winner of the contest (29 : 8 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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 Nikon Z7 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 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 Z7. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is why expert reviews are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Nikon D3100»||+ +||72/100||4.5/5||5/5||4.5/5||Aug 2010||599||-||Nikon D3100|
|Nikon Z7«||+||89/100||4.5/5||4.5/5||5/5||Aug 2018||3,399||Nikon Z7|
|Nikon D850« »||+ +||89/100||4.5/5||5/5||5/5||Jul 2017||3,299||Nikon D850|
|Nikon D3200« »||+ +||73/100||4.5/5||4.5/5||4.5/5||Apr 2012||599||-||Nikon D3200|
|Nikon D5100« »||+ +||76/100||4.5/5||5/5||4.5/5||Apr 2011||749||-||Nikon D5100|
|Nikon D7000« »||-||80/100||4.5/5||5/5||4.5/5||Sep 2010||1,499||-||Nikon D7000|
|Nikon D3000« »||+||72/100||4/5||3.5/5||4.5/5||Jul 2009||599||-||Nikon D3000|
|Nikon D5000« »||+ +||75/100||4/5||5/5||4.5/5||Apr 2009||749||-||Nikon D5000|
|Nikon D60« »||80/100||+ +||4/5||o||4.5/5||Jan 2008||629||-||Nikon D60|
|Nikon D40X« »||79/100||+ +||4/5||o||4/5||Mar 2007||729||-||Nikon D40X|
|Nikon D40« »||81/100||+ +||o||5/5||4.5/5||Nov 2006||499||-||Nikon D40|
|Panasonic S1R« »||-||89/100||4.5/5||-||4.5/5||Feb 2019||3,699||Panasonic S1R|
|Sony A9« »||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499||Sony A9|
|Sony A7R II« »||+ +||90/100||5/5||4.5/5||5/5||Jun 2015||3,199||-||Sony A7R II|
|Sony A7S II« »||+||-||4.5/5||5/5||5/5||Sep 2015||2,999||Sony A7S II|
|Sony NEX-5N« »||+ +||79/100||4.5/5||5/5||4.5/5||Aug 2011||699||-||Sony NEX-5N|
|Sony NEX-C3« »||+ +||74/100||4.5/5||4.5/5||4/5||Jun 2011||599||-||Sony NEX-C3|
|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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
Other camera comparisons
Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
Specifications: Nikon D3100 vs Nikon Z7
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||Nikon Z7|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Nikon Z mount lenses|
|Launch Date||August 2010||August 2018|
|Launch Price||USD 599||USD 3399|
|Sensor Specs||Nikon D3100||Nikon Z7|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.1 x 15.4 mm||35.9 x 23.9 mm|
|Sensor Area||355.74 mm2||858.01 mm2|
|Sensor Diagonal||27.8 mm||43.1 mm|
|Sensor Resolution||14.2 Megapixels||45.4 Megapixels|
|Image Resolution||4608 x 3072 pixels||8256 x 5504 pixels|
|Pixel Pitch||5.01 μm||4.35 μm|
|Pixel Density||3.98 MP/cm2||5.30 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/24p Video||4K/30p Video|
|ISO Setting||100-3200 ISO||64-25600 ISO|
|ISO Boost||100-12800 ISO||32-102400 ISO|
|Image Processor||EXPEED 2||EXPEED 6|
|DXO Sensor Quality (score)||67||99|
|DXO Color Depth (bits)||22.5||26.3|
|DXO Dynamic Range (EV)||11.3||14.6|
|DXO Low Light (ISO)||919||2668|
|Screen Specs||Nikon D3100||Nikon Z7|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||3690k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.2 inch|
|LCD Resolution||230k dots||2100k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Nikon D3100||Nikon Z7|
|Autofocus System||Phase-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000/s||1/8000/s|
|Continuous Shooting||3 shutter flaps/s||9 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||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||XQD cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Nikon D3100||Nikon Z7|
|USB Connector||USB 2.0||USB 3.1|
|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|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Nikon D3100||Nikon Z7|
|Environmental Sealing||Not weather sealed||Weathersealed body|
|Battery Life (CIPA)||550 shots per charge||330 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
124 x 96 x 75 mm
(4.9 x 3.8 x 3.0 in)
134 x 101 x 67 mm
(5.3 x 4.0 x 2.6 in)
|Camera Weight||505 g (17.8 oz)||675 g (23.8 oz)|
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