Nikon D5100 vs Sony A7R III
The Nikon D5100 and the Sony Alpha A7R III are two digital cameras that were officially introduced, respectively, in April 2011 and October 2017. The D5100 is a DSLR, while the A7R III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D5100) and a full frame (A7R III) sensor. The Nikon has a resolution of 16.1 megapixels, whereas the Sony provides 42.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Nikon D5100||Sony A7R III|
|Digital single lens reflex||Mirrorless system camera|
|Nikon F mount lenses||Sony E mount lenses|
|16.1 MP, APS-C Sensor||42.2 MP, Full Frame Sensor|
|1080/30p Video||4K/30p Video|
|ISO 100-6400 (100-25600)||ISO 100-32000 (50-102400)|
|Optical viewfinder||Electronic viewfinder (3686k dots)|
|3.0" LCD, 921k dots||3.0" LCD, 1440k dots|
|Swivel screen (not touch-sensitive)||Tilting touchscreen|
|4 shutter flaps per second||10 shutter flaps per second|
|Lens stabilization only||In-body stabilization|
|Not weather sealed||Weathersealed body|
|660 shots per battery charge||650 shots per battery charge|
|128 x 97 x 79 mm, 560 g||127 x 96 x 74 mm, 650 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D5100 and the Sony Alpha A7R III? 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 physical size and weight of the Nikon D5100 and the Sony A7R III 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 size dimensions are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is somewhat smaller (2 percent) than the Nikon D5100. However, the A7R III is markedly heavier (16 percent) than the D5100. It is noteworthy in this context that the A7R III is splash and dust-proof, while the D5100 does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D5100) and the Sony FE Lens Catalog (A7R III). Mirrorless cameras, such as the A7R III, 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 D5100 gets 660 shots out of its EN-EL14 battery, while the A7R III can take 650 images on a single charge of its NP-FZ100 power pack. The power pack in the A7R III can be charged via the USB port, which can be very convenient when travelling.
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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Nikon D5100»||128 mm||97 mm||79 mm||560 g||660||n||Apr 2011||749||Nikon D5100|
|Sony A7R III«||127 mm||96 mm||74 mm||650 g||650||Y||Oct 2017||3,199||Sony A7R III|
|Canon G1 X« »||117 mm||81 mm||65 mm||534 g||250||n||Jan 2012||799||Canon G1 X|
|Canon 550D« »||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699||Canon 550D|
|Nikon D5600« »||124 mm||97 mm||70 mm||465 g||970||n||Nov 2016||699||Nikon D5600|
|Nikon D5500« »||124 mm||97 mm||70 mm||420 g||820||n||Jan 2015||899||Nikon D5500|
|Nikon D5300« »||125 mm||98 mm||76 mm||480 g||600||n||Oct 2013||799||Nikon D5300|
|Nikon D3200« »||125 mm||96 mm||77 mm||505 g||540||n||Apr 2012||599||Nikon D3200|
|Nikon D5200« »||129 mm||98 mm||78 mm||555 g||500||n||Nov 2012||749||Nikon D5200|
|Nikon D7000« »||132 mm||105 mm||77 mm||780 g||1050||Y||Sep 2010||1,499||Nikon D7000|
|Nikon D3100« »||124 mm||96 mm||75 mm||505 g||550||n||Aug 2010||599||Nikon D3100|
|Nikon D5000« »||127 mm||104 mm||80 mm||590 g||510||n||Apr 2009||749||Nikon D5000|
|Sony A7 III« »||127 mm||96 mm||74 mm||650 g||610||Y||Feb 2018||1,999||Sony A7 III|
|Sony A9« »||127 mm||96 mm||63 mm||673 g||650||Y||Apr 2017||4,499||Sony A9|
|Sony A99 II« »||143 mm||104 mm||76 mm||849 g||490||Y||Sep 2016||3,199||Sony A99 II|
|Sony A7R II« »||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199||Sony A7R II|
|Sony A7S II« »||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999||Sony A7S II|
|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 D5100 was launched at a markedly lower price (by 77 percent) than the A7R III, 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.
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Nikon D5100 features an APS-C sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 132 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 42.2MP, the A7R III offers a higher resolution than the D5100 (16.1MP), but the A7R III has smaller individual pixels (pixel pitch of 4.52μm versus 4.80μm for the D5100). Yet, the A7R III is a much more recent model (by 6 years and 6 months) than the D5100, 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 A7R III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Sony A7R III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inch or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inch or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inch or 67.3 x 44.9 cm. The corresponding values for the Nikon D5100 are 24.6 x 16.3 inch or 62.6 x 41.5 cm for good quality, 19.7 x 13.1 inch or 50.1 x 33.2 cm for very good quality, and 16.4 x 10.9 inch or 41.7 x 27.6 cm for excellent quality prints.
The A7R III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Unlike the D5100, the A7R III has the capacity to capture high quality composite images by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
The Nikon D5100 has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-25600. The corresponding ISO settings for the Sony Alpha A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.
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 A7R III offers substantially better image quality than the D5100 (overall score 20 points higher). The advantage is based on 2.5 bits higher color depth, 1.1 EV in additional dynamic range, and 1.6 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.
|Nikon D5100||APS-C||16.1||4928||3264||1080/30p||23.5||13.6||1183||80||Nikon D5100|
|Sony A7R III||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100||Sony A7R III|
|Canon G1 X||1.5-inch||14.2||4352||3264||1080/24p||21.7||10.8||644||60||Canon G1 X|
|Canon 550D||APS-C||17.9||5184||3456||1080/30p||22.1||11.5||784||66||Canon 550D|
|Nikon D5600||APS-C||24.0||6000||4000||1080/60p||24.1||14.0||1306||84||Nikon D5600|
|Nikon D5500||APS-C||24.0||6000||4000||1080/60p||24.1||14.0||1438||84||Nikon D5500|
|Nikon D5300||APS-C||24.0||6000||4000||1080/60p||24.0||13.9||1338||83||Nikon D5300|
|Nikon D3200||APS-C||24.1||6016||4000||1080/30p||24.1||13.2||1131||81||Nikon D3200|
|Nikon D5200||APS-C||24.0||6000||4000||1080/60i||24.2||13.9||1284||84||Nikon D5200|
|Nikon D7000||APS-C||16.1||4928||3264||10800/24p||23.5||13.9||1167||80||Nikon D7000|
|Nikon D3100||APS-C||14.2||4608||3072||1080/24p||22.5||11.3||919||67||Nikon D3100|
|Nikon D5000||APS-C||12.2||4288||2848||720/24p||22.7||12.5||868||72||Nikon D5000|
|Sony A7 III||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96||Sony A7 III|
|Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92||Sony A9|
|Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92||Sony A99 II|
|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|
Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the A7R III provides a better video resolution than the D5100. It can shoot movie footage at 4K/30p, while the Nikon is limited to 1080/30p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7R III has an electronic viewfinder (3686k dots), while the D5100 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 A7R III offers a wider field of view (100%) than the one in the D5100 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7R III has a higher magnification (0.78x vs 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D5100 and Sony A7R III along with similar information for a selection of comparators.
|Nikon D5100||optical||n||3.0||921||swivel||n||1/4000s||4.0||Y||n||Nikon D5100|
|Sony A7R III||3686||n||3.0||1440||tilting||Y||1/8000s||10.0||n||Y||Sony A7R III|
|Canon G1 X||optical||n||3.0||922||Swivel||n||1/4000s||1.9||Y||Y||Canon G1 X|
|Canon 550D||optical||n||3.0||1040||fixed||n||1/4000s||3.7||Y||n||Canon 550D|
|Nikon D5600||optical||n||3.2||1037||swivel||Y||1/4000s||5.0||Y||n||Nikon D5600|
|Nikon D5500||optical||n||3.2||1037||swivel||Y||1/4000s||5.0||Y||n||Nikon D5500|
|Nikon D5300||optical||n||3.2||1037||swivel||n||1/4000s||5.0||Y||n||Nikon D5300|
|Nikon D3200||optical||n||3.0||921||fixed||n||1/4000s||4.0||Y||n||Nikon D3200|
|Nikon D5200||optical||n||3.0||921||swivel||n||1/4000s||5.0||Y||n||Nikon D5200|
|Nikon D7000||optical||Y||3.0||921||fixed||n||1/8000s||6.0||Y||n||Nikon D7000|
|Nikon D3100||optical||n||3.0||230||fixed||n||1/4000s||3.0||Y||n||Nikon D3100|
|Nikon D5000||optical||n||2.7||230||full-flex||n||1/4000s||4.0||Y||n||Nikon D5000|
|Sony A7 III||2359||n||3.0||922||tilting||Y||1/8000s||10.0||n||Y||Sony A7 III|
|Sony A9||3686||n||3.0||1440||tilting||Y||1/8000s||20.0||n||Y||Sony A9|
|Sony A99 II||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y||Sony A99 II|
|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|
One difference between the cameras concerns the presence of an on-board flash. The D5100 has one, while the A7R III does not. While the built-in flash of the D5100 is not very powerful, it can at times be useful as a fill-in light.The D5100 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7R III does not have a selfie-screen.
The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7R III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The Nikon D5100 and the Sony A7R III both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The D5100 writes its imaging data to SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. The A7R III features dual card slots, which can be very useful in case a memory card fails. In contrast, the D5100 only has one slot. The A7R III supports UHS-II cards (on its first slot), while the D5100 can use UHS-I 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 D5100 and Sony Alpha A7R III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Nikon D5100||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D5100|
|Sony A7R III||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7R III|
|Canon G1 X||Y||stereo||mono||-||-||mini||2.0||-||-||-||Canon G1 X|
|Canon 550D||Y||stereo||none||Y||-||mini||2.0||-||-||-||Canon 550D|
|Nikon D5600||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Nikon D5600|
|Nikon D5500||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Nikon D5500|
|Nikon D5300||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Nikon D5300|
|Nikon D3200||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D3200|
|Nikon D5200||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Nikon D5200|
|Nikon D7000||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D7000|
|Nikon D3100||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D3100|
|Nikon D5000||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D5000|
|Sony A7 III||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7 III|
|Sony A9||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A9|
|Sony A99 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A99 II|
|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|
It is notable that the A7R III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D5100 does not offer wifi capability.
Studio photographers will appreciate that the Sony A7R III (unlike the D5100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the D5100 and the A7R III have been discontinued, but can regularly be found used on eBay. The D5100 was replaced by the Nikon D5200, while the A7R III was followed by the Sony A7R IV. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sony websites.
So how do things add up? Which of the two cameras – the Nikon D5100 or the Sony A7R III – 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.
Advantages of the Nikon D5100:
- 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 flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Less heavy: Is lighter (by 90g or 14 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 (77 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in April 2011).
Arguments in favor of the Sony Alpha A7R III:
- More detail: Has more megapixels (42.2 vs 16.1MP), which boosts linear resolution by 62%.
- 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 (20 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.5 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1.6 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- 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 (0.78x vs 0.51x).
- More detailed LCD: Has a higher resolution rear screen (1440k vs 921k dots).
- 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 (10 vs 4 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent 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 device pairing: Supports NFC for fast wireless image transfer over short distances.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- 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: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
- More modern: Reflects 6 years and 6 months of technical progress since the D5100 launch.
If the count of individual advantages (bullet points above) is taken as a guide, the A7R III is the clear winner of the contest (29 : 8 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 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 D5100 and the Sony A7R III 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 D5100 or the A7R III perform in practice. 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 where reviews by experts come in. 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.
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 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 1300D vs Sony A7R III
- Canon T5 vs Sony A7R III
- Fujifilm X-Pro2 vs Nikon D5100
- Hasselblad X1D II vs Sony A7R III
- Leica S Typ 007 vs Sony A7R III
- Nikon D3500 vs Nikon D5100
- Nikon D5100 vs Nikon Df
- Nikon D5100 vs Panasonic S1H
- Nikon D5100 vs Sony A7S
- Nikon D5100 vs Sony H300
- Nikon D5100 vs Sony HX90V
- Sony A7R III vs Sony RX0 II
Specifications: Nikon D5100 vs Sony A7R III
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 D5100||Sony A7R III|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Sony E mount lenses|
|Launch Date||April 2011||October 2017|
|Launch Price||USD 749||USD 3199|
|Sensor Specs||Nikon D5100||Sony A7R III|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.6 x 15.7 mm||35.9 x 24.0 mm|
|Sensor Area||370.52 mm2||861.6 mm2|
|Sensor Diagonal||28.3 mm||43.2 mm|
|Sensor Resolution||16.1 Megapixels||42.2 Megapixels|
|Image Resolution||4928 x 3264 pixels||7952 x 5304 pixels|
|Pixel Pitch||4.80 μm||4.52 μm|
|Pixel Density||4.34 MP/cm2||4.90 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/30p Video||4K/30p Video|
|ISO Setting||100-6400 ISO||100-32000 ISO|
|ISO Boost||100-25600 ISO||50-102400 ISO|
|Image Processor||EXPEED 2||BIONZ X|
|DXO Sensor Quality (score)||80||100|
|DXO Color Depth (bits)||23.5||26.0|
|DXO Dynamic Range (EV)||13.6||14.7|
|DXO Low Light (ISO)||1183||3523|
|Screen Specs||Nikon D5100||Sony A7R III|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||3686k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||921k dots||1440k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Nikon D5100||Sony A7R III|
|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||4 shutter flaps/s||10 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||500 000 actuations|
|Electronic Shutter||no E-Shutter||YES|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||Single UHS-II|
|Connectivity Specs||Nikon D5100||Sony A7R III|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 3.1|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Nikon D5100||Sony A7R III|
|Environmental Sealing||Not weather sealed||Weathersealed body|
|Battery Life (CIPA)||660 shots per charge||650 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
128 x 97 x 79 mm
(5.0 x 3.8 x 3.1 in)
127 x 96 x 74 mm
(5.0 x 3.8 x 2.9 in)
|Camera Weight||560 g (19.8 oz)||650 g (22.9 oz)|
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