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Nikon D90 vs Sony A7

The Nikon D90 and the Sony Alpha A7 are two enthusiast cameras that were announced, respectively, in August 2008 and October 2013. The D90 is a DSLR, while the A7 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D90) and a full frame (A7) sensor. The Nikon has a resolution of 12.2 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.

Headline Specifications
Nikon D90   Sony A7
Nikon D90 Sony A7
Digital single lens reflex Mirrorless system camera
Nikon F mount lenses Sony E mount lenses
12.2 MP, APS-C Sensor 24 MP, Full Frame Sensor
720/24p Video 1080/60p Video
ISO 200-3200 (200-6400) ISO 100-25600 (50-51200)
Optical viewfinder Electronic viewfinder (2400k dots)
3.0" LCD, 920k dots 3.0" LCD, 1230k dots
Fixed screen (not touch-sensitive) Tilting screen (not touch-sensitive)
4.5 shutter flaps per second 5 shutter flaps per second
Not weather sealedWeathersealed body
850 shots per battery charge340 shots per battery charge
132 x 103 x 77 mm, 703 g 127 x 94 x 48 mm, 474 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D90 and the Sony Alpha A7? 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 side-by-side display below illustrates the physical size and weight of the Nikon D90 and the Sony A7. 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.

Size Nikon D90 vs Sony A7
Compare D90 versus A7 top
Comparison D90 or A7 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 is notably smaller (12 percent) than the Nikon D90. Moreover, the A7 is markedly lighter (33 percent) than the D90. It is noteworthy in this context that the A7 is splash and dust-proof, while the D90 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 (D90) and the Sony FE Lens Catalog (A7). Mirrorless cameras, such as the A7, 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 D90 gets 850 shots out of its EN-EL3e battery, while the A7 can take 340 images on a single charge of its NP-FW50 power pack. The power pack in the A7 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 want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Nikon D90» 5.2 in 4.1 in 3.0 in 24.8 oz 850 n Aug 2008 1,299- i Nikon D90
 
Sony A7« 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699- i Sony A7
 
Canon 40D« » 5.7 in 4.3 in 2.9 in 29.0 oz 750 n Aug 2007 1,299- i Canon 40D
 
Nikon D7000« » 5.2 in 4.1 in 3.0 in 27.5 oz 1050 Y Sep 2010 1,499- i Nikon D7000
 
Nikon D3100« » 4.9 in 3.8 in 3.0 in 17.8 oz 550 n Aug 2010 599- i Nikon D3100
 
Nikon D300S« » 5.8 in 4.5 in 3.2 in 33.1 oz 950 Y Jul 2009 1,799- i Nikon D300S
 
Nikon D3000« » 5.0 in 3.8 in 2.5 in 18.9 oz 500 n Jul 2009 599- i Nikon D3000
 
Nikon D5000« » 5.0 in 4.1 in 3.1 in 20.8 oz 510 n Apr 2009 749- i Nikon D5000
 
Nikon D60« » 5.0 in 3.7 in 2.5 in 18.4 oz 500 n Jan 2008 629- i Nikon D60
 
Nikon D40X« » 4.9 in 3.7 in 2.5 in 18.4 oz 520 n Mar 2007 729- i Nikon D40X
 
Nikon D300« » 5.8 in 4.5 in 2.9 in 32.6 oz 1000 Y Aug 2007 1,799- i Nikon D300
 
Nikon D80« » 5.2 in 4.1 in 3.0 in 23.6 oz 600 n Aug 2006 999- i Nikon D80
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony A7S« » 5.0 in 3.7 in 1.9 in 17.2 oz 380 Y Apr 2014 2,499- i Sony A7S
 
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i Sony A7R
 
Sony RX1R« » 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Jun 2013 2,799- i Sony RX1R
 
Sony RX1« » 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Sep 2012 2,799- i Sony RX1
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D90 was launched at a somewhat lower price (by 24 percent) than the A7, which makes it more attractive for photographers on a tight budget. 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.

 

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Nikon D90 features an APS-C sensor and the Sony A7 a full frame sensor. The sensor area in the A7 is 129 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.

Nikon D90 and Sony A7 sensor measures

With 24MP, the A7 offers a higher resolution than the D90 (12.2MP), but the A7 nevertheless has larger individual pixels (pixel pitch of 5.97μm versus 5.53μm for the D90) due to its larger sensor. Moreover, the A7 is a much more recent model (by 5 years and 1 month) than the D90, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Nikon D90 are 21.4 x 14.2 inch or 54.5 x 36.2 cm for good quality, 17.2 x 11.4 inch or 43.6 x 28.9 cm for very good quality, and 14.3 x 9.5 inch or 36.3 x 24.1 cm for excellent quality prints.

The A7 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Nikon D90 has a native sensitivity range from ISO 200 to ISO 3200, which can be extended to ISO 200-6400. The corresponding ISO settings for the Sony Alpha A7 are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

D90 versus A7 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under consideration, the A7 offers substantially better image quality than the D90 (overall score 17 points higher). The advantage is based on 2.1 bits higher color depth, 1.7 EV in additional dynamic range, and 1.2 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Nikon D90» APS-C 12.2 4288 2848720/24p22.712.597773Nikon D90
 
Sony A7« Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7
 
Canon 40D« » APS-C 10.1 3888 2592-22.111.370364Canon 40D
 
Nikon D7000« » APS-C 16.1 4928 326410800/24p23.513.9116780Nikon D7000
 
Nikon D3100« » APS-C 14.2 4608 30721080/24p22.511.391967Nikon D3100
 
Nikon D300S« » APS-C 12.2 4288 2848720/24p22.512.278770Nikon D300S
 
Nikon D3000« » APS-C 10.0 3872 2592-22.311.156362Nikon D3000
 
Nikon D5000« » APS-C 12.2 4288 2848720/24p22.712.586872Nikon D5000
 
Nikon D60« » APS-C 10.0 3872 2592-22.511.456265Nikon D60
 
Nikon D40X« » APS-C 10.0 3872 2592-22.411.451663Nikon D40X
 
Nikon D300« » APS-C 12.2 4288 2848-22.112.067967Nikon D300
 
Nikon D80« » APS-C 10.0 3872 2592-22.111.252461Nikon D80
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony A7S« » Full Frame 12.0 4240 28321080/60p23.913.2370287Sony A7S
 
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R
 
Sony RX1R« » Full Frame 24.0 6000 40001080/60p25.013.6253791Sony RX1R
 
Sony RX1« » Full Frame 24.0 6000 40001080/60p25.114.3253493Sony RX1

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A7 provides a better video resolution than the D90. It can shoot movie footage at 1080/60p, while the Nikon is limited to 720/24p.

 

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7 has an electronic viewfinder (2400k dots), while the D90 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 A7 offers a wider field of view (100%) than the one in the D90 (96%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7 has a higher magnification (0.71x vs 0.63x), 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 D90 and Sony A7 in connection with corresponding information for a sample of similar cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Nikon D90»optical Y 3.0 920 fixed n 1/4000s 4.5 Y n Nikon D90
 
Sony A7«2400 n 3.0 1230 tilting n 1/8000s 5.0 n n Sony A7
 
Canon 40D« »optical Y 3.0 230 fixed n 1/8000s 6.5 Y n Canon 40D
 
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 D300S« »optical Y 3.0 920 fixed n 1/8000s 7.0 Y n Nikon D300S
 
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 D300« »optical Y 3.0 922 fixed n 1/8000s 6.0 Y n Nikon D300
 
Nikon D80« »optical n 2.5 230 fixed n 1/4000s 3.0 Y n Nikon D80
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony A7S« »2400 n 3.0 921 tilting n 1/8000s 5.0 n n Sony A7S
 
Sony A7R« »2400 n 3.0 1230 tilting n 1/8000s 4.0 n n Sony A7R
 
Sony RX1R« »- n 3.0 1229 fixed n 1/4000s 5.0 Y n Sony RX1R
 
Sony RX1« »- n 3.0 1229 fixed n 1/4000s 5.0 Y n Sony RX1

One difference between the cameras concerns the presence of an on-board flash. The D90 has one, while the A7 does not. While the built-in flash of the D90 is not very powerful, it can at times be useful as a fill-in light.

The D90 writes its imaging data to SDHC cards, while the A7 uses SDXC or Memory Stick PRO Duo cards. The A7 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D90 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 D90 and Sony Alpha A7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Nikon D90»Ymonomono--mini2.0---Nikon D90
 
Sony A7«YstereomonoYYmicro2.0YY-Sony A7
 
Canon 40D« »Y-----2.0---Canon 40D
 
Nikon D7000« »YmonomonoY-mini2.0---Nikon D7000
 
Nikon D3100« »Ymonomono--mini2.0---Nikon D3100
 
Nikon D300S« »YstereomonoY-mini2.0---Nikon D300S
 
Nikon D3000« »Y-----2.0---Nikon D3000
 
Nikon D5000« »Ymonomono--mini2.0---Nikon D5000
 
Nikon D60« »Y-----2.0---Nikon D60
 
Nikon D40X« »Y-----2.0---Nikon D40X
 
Nikon D300« »Y----mini2.0---Nikon D300
 
Nikon D80« »Y-----2.0---Nikon D80
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony A7S« »YstereomonoYYmicro2.0YY-Sony A7S
 
Sony A7R« »YstereomonoYYmicro2.0YY-Sony A7R
 
Sony RX1R« »YstereomonoY-mini2.0---Sony RX1R
 
Sony RX1« »YstereomonoY-mini2.0---Sony RX1

It is notable that the A7 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D90 does not offer wifi capability.

Both the D90 and the A7 have been discontinued, but can regularly be found used on eBay. The D90 was replaced by the Nikon D7000, while the A7 was followed by the Sony A7 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sony websites.


Review summary

So what is the bottom line? Which of the two cameras – the Nikon D90 or the Sony A7 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Nikon D90:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Longer lasting: Can take more shots (850 versus 340) 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 segment (24 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2008).

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Reasons to prefer the Sony Alpha A7:

  • More detail: Has more megapixels (24 vs 12.2MP), which boosts linear resolution by 40%.
  • Better image quality: Scores substantially higher (17 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.2 stops ISO advantage).
  • Better video: Provides higher definition movie capture (1080/60p vs 720/24p).
  • 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 96%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.71x vs 0.63x).
  • More detailed LCD: Has a higher resolution rear screen (1230k vs 920k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • More compact: Is smaller (127x94mm vs 132x103mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 229g or 33 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • 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.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 5 years and 1 month of technical progress since the D90 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7 is the clear winner of the contest (23 : 6 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.

D90 06:23 A7

How about other alternatives? Do the specifications of the Nikon D90 and the Sony A7 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 incomplete and does no justice, for example, to the way the D90 or the A7 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 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Nikon D90»+ ++ +4/55/54.5/5 Aug 2008 1,299- i Nikon D90
 
Sony A7«+ +80/1005/54.5/55/5 Oct 2013 1,699- i Sony A7
 
Canon 40D« »+ ++ +4.5/5o4.5/5 Aug 2007 1,299- i Canon 40D
 
Nikon D7000« »-80/1004.5/55/54.5/5 Sep 2010 1,499- i Nikon D7000
 
Nikon D3100« »+ +72/1004.5/55/54.5/5 Aug 2010 599- i Nikon D3100
 
Nikon D300S« »+ +82/1004/55/54.5/5 Jul 2009 1,799- i Nikon D300S
 
Nikon D3000« »+72/1004/53.5/54.5/5 Jul 2009 599- i Nikon D3000
 
Nikon D5000« »+ +75/1004/55/54.5/5 Apr 2009 749- i Nikon D5000
 
Nikon D60« »80/100+ +4/5o4.5/5 Jan 2008 629- i Nikon D60
 
Nikon D40X« »79/100+ +4/5o4/5 Mar 2007 729- i Nikon D40X
 
Nikon D300« »+ ++ +5/5o4.5/5 Aug 2007 1,799- i Nikon D300
 
Nikon D80« »++ +o4.5/54.5/5 Aug 2006 999- i Nikon D80
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony A7S« »-86/1004.5/54.5/55/5 Apr 2014 2,499- i Sony A7S
 
Sony A7R« »+ +82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R
 
Sony RX1R« »--4/5o4.5/5 Jun 2013 2,799- i Sony RX1R
 
Sony RX1« »-79/1004/54.5/54.5/5 Sep 2012 2,799- i Sony RX1
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. 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. Also, please note that some of the review sites have changed their methodology and reporting over time.

Nikon D90:
Check Ebay offers
Sony A7:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Nikon D90 vs Sony A7

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Nikon D90 Sony A7
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Nikon F mount lenses Sony E mount lenses
    Launch Date August 2008 October 2013
    Launch Price USD 1299 USD 1699
    Sensor Specs Nikon D90 Sony A7
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.6 x 15.8 mm 35.8 x 23.9 mm
    Sensor Area 372.88 mm2 855.62 mm2
    Sensor Diagonal 28.4 mm 43 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 12.2 Megapixels 24 Megapixels
    Image Resolution 4288 x 2848 pixels 6000 x 4000 pixels
    Pixel Pitch 5.53 μm 5.97 μm
    Pixel Density 3.28 MP/cm2 2.80 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 720/24p Video 1080/60p Video
    ISO Setting 200-3200 ISO 100-25600 ISO
    ISO Boost 200-6400 ISO 50-51200 ISO
    Image Processor EXPEED BIONZ X
    DXO Sensor Quality (score) 73 90
    DXO Color Depth (bits) 22.7 24.8
    DXO Dynamic Range (EV) 12.5 14.2
    DXO Low Light (ISO) 977 2248
    Screen Specs Nikon D90 Sony A7
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 96% 100%
    Viewfinder Magnification 0.63x 0.71x
    Viewfinder Resolution 2400k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 920k dots 1230k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D90 Sony A7
    Autofocus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidNo Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000/s 1/8000/s
    Continuous Shooting 4.5 shutter flaps/s 5 shutter flaps/s
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDHC cards MS or SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Nikon D90 Sony A7
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Nikon D90 Sony A7
    Environmental SealingNot weather sealedWeathersealed body
    Battery Type EN-EL3e NP-FW50
    Battery Life (CIPA)850 shots per charge340 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 132 x 103 x 77 mm
    (5.2 x 4.1 x 3.0 in)
    127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 703 g (24.8 oz) 474 g (16.7 oz)

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