Sony A9 vs Nikon D90
The Sony Alpha A9 and the Nikon D90 are two digital cameras that were announced, respectively, in April 2017 and August 2008. The A9 is a mirrorless interchangeable lens camera, while the D90 is a DSLR. The cameras are based on a full frame (A9) and an APS-C (D90) sensor. The Sony has a resolution of 24 megapixels, whereas the Nikon provides 12.2 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 Sony Alpha A9 and the Nikon D90? 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 Sony A9 and the Nikon D90 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D90 is notably larger (12 percent) than the Sony A9. Moreover, the D90 is slightly heavier (4 percent) than the A9. It is worth mentioning in this context that the A9 is splash and dust resistant, 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 Sony FE Lens Catalog (A9) and the Nikon Lens Catalog (D90). Mirrorless cameras, such as the Sony A9, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.
Concerning battery life, the A9 gets 650 shots out of its Sony NP-FZ100 battery, while the D90 can take 850 images on a single charge of its Nikon EN-EL3e power pack. The power pack in the A9 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.
Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Sony A9 | 127 mm | 96 mm | 63 mm | 673 g | 650 | Y | Apr 2017 | 4,499 | ebay.com | |
2. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | 1,299 | ebay.com | |
3. | Canon 40D | 146 mm | 108 mm | 74 mm | 822 g | 750 | n | Aug 2007 | 1,299 | ebay.com | |
4. | Nikon D80 | 132 mm | 103 mm | 77 mm | 668 g | 600 | n | Aug 2006 | 999 | ebay.com | |
5. | Nikon D300S | 147 mm | 115 mm | 81 mm | 938 g | 950 | Y | Jul 2009 | 1,799 | ebay.com | |
6. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | 749 | ebay.com | |
7. | Nikon D7000 | 132 mm | 105 mm | 77 mm | 780 g | 1050 | Y | Sep 2010 | 1,499 | ebay.com | |
8. | Nikon Z6 | 134 mm | 101 mm | 67 mm | 675 g | 310 | Y | Aug 2018 | 1,999 | ebay.com | |
9. | Sony A7 II | 127 mm | 96 mm | 60 mm | 599 g | 350 | Y | Nov 2014 | 1,999 | ebay.com | |
10. | Sony A7 III | 127 mm | 96 mm | 74 mm | 650 g | 610 | Y | Feb 2018 | 1,999 | amazon.com | |
11. | Sony A7R II | 127 mm | 96 mm | 60 mm | 625 g | 290 | Y | Jun 2015 | 3,199 | ebay.com | |
12. | Sony A7R III | 127 mm | 96 mm | 74 mm | 650 g | 650 | Y | Oct 2017 | 3,199 | ebay.com | |
13. | Sony A7R IIIA | 127 mm | 96 mm | 74 mm | 650 g | 650 | Y | Apr 2021 | 3,199 | amazon.com | |
14. | Sony A7R V | 131 mm | 97 mm | 82 mm | 723 g | 530 | Y | Oct 2022 | 3,899 | amazon.com | |
15. | Sony A7S II | 127 mm | 96 mm | 60 mm | 627 g | 370 | Y | Sep 2015 | 2,999 | ebay.com | |
16. | Sony A9 II | 129 mm | 96 mm | 76 mm | 678 g | 690 | Y | Oct 2019 | 4,499 | amazon.com | |
17. | Sony A99 | 147 mm | 111 mm | 78 mm | 812 g | 500 | Y | 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 obviously take relative prices into account. 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 D90 was launched at a markedly lower price (by 71 percent) than the A9, 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.
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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Sony A9 features a full frame sensor and the Nikon D90 an APS-C sensor. The sensor area in the D90 is 56 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 24MP, the A9 offers a higher resolution than the D90 (12.2MP), but the A9 nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 5.53μm for the D90) due to its larger sensor. Moreover, the A9 is a much more recent model (by 8 years and 7 months) than the D90, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.
The resolution advantage of the Sony A9 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A9 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 D90 are 21.4 x 14.2 inches or 54.5 x 36.2 cm for good quality, 17.2 x 11.4 inches or 43.6 x 28.9 cm for very good quality, and 14.3 x 9.5 inches or 36.3 x 24.1 cm for excellent quality prints.
The A9 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Sony Alpha A9 has a native sensitivity range from ISO 100 to ISO 51200, which can be extended to ISO 50-204800. The corresponding ISO settings for the Nikon D90 are ISO 200 to ISO 3200, with the possibility to increase the ISO range to 200-6400.
In terms of underlying technology, the A9 is build around a Stacked BSI-CMOS sensor, while the D90 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the A9 provides substantially higher image quality than the D90, with an overall score that is 19 points higher. This advantage is based on 2.2 bits higher color depth, 0.8 EV in additional dynamic range, and 1.8 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.
Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Sony A9 | Full Frame | 24.0 | 6000 | 4000 | 4K/30p | 24.9 | 13.3 | 3517 | 92 | |
2. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
3. | Canon 40D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.3 | 703 | 64 | |
4. | Nikon D80 | APS-C | 10.0 | 3872 | 2592 | none | 22.1 | 11.2 | 524 | 61 | |
5. | Nikon D300S | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.5 | 12.2 | 787 | 70 | |
6. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
7. | Nikon D7000 | APS-C | 16.1 | 4928 | 3264 | 1080/24p | 23.5 | 13.9 | 1167 | 80 | |
8. | Nikon Z6 | Full Frame | 24.3 | 6048 | 4024 | 4K/30p | 25.3 | 14.3 | 3299 | 95 | |
9. | Sony A7 II | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 24.9 | 13.6 | 2449 | 90 | |
10. | Sony A7 III | Full Frame | 24.0 | 6000 | 4000 | 4K/30p | 25.0 | 14.7 | 3730 | 96 | |
11. | Sony A7R II | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 13.9 | 3434 | 98 | |
12. | Sony A7R III | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 14.7 | 3523 | 100 | |
13. | Sony A7R IIIA | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 14.7 | 3523 | 100 | |
14. | Sony A7R V | Full Frame | 60.2 | 9504 | 6336 | 8k/24p | 26.5 | 14.8 | 3187 | 100 | |
15. | Sony A7S II | Full Frame | 12.0 | 4240 | 2832 | 4K/30p | 23.6 | 13.3 | 2993 | 85 | |
16. | Sony A9 II | Full Frame | 24.0 | 6000 | 4000 | 4K/30p | 25.0 | 14.0 | 3434 | 93 | |
17. | Sony A99 | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 25.0 | 14.0 | 1555 | 89 |
Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the A9 provides a higher video resolution than the D90. It can shoot video footage at 4K/30p, 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 A9 has an electronic viewfinder (3686k 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 A9 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 A9 has a higher magnification (0.78x 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 Sony A9 and Nikon D90 in connection with corresponding information for a sample of similar cameras.
Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Sony A9 | 3686 | n | 3.0 / 1440 | tilting | Y | 1/8000s | 20.0/s | n | Y | |
2. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
3. | Canon 40D | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 6.5/s | Y | n | |
4. | Nikon D80 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
5. | Nikon D300S | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 7.0/s | Y | n | |
6. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
7. | Nikon D7000 | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 6.0/s | Y | n | |
8. | Nikon Z6 | 3690 | Y | 3.2 / 2100 | tilting | Y | 1/8000s | 12.0/s | n | Y | |
9. | Sony A7 II | 2400 | n | 3.0 / 1230 | tilting | n | 1/8000s | 5.0/s | n | Y | |
10. | Sony A7 III | 2359 | n | 3.0 / 922 | tilting | Y | 1/8000s | 10.0/s | n | Y | |
11. | Sony A7R II | 2400 | n | 3.0 / 1229 | tilting | n | 1/8000s | 5.0/s | n | Y | |
12. | Sony A7R III | 3686 | n | 3.0 / 1440 | tilting | Y | 1/8000s | 10.0/s | n | Y | |
13. | Sony A7R IIIA | 3686 | n | 3.0 / 2340 | tilting | Y | 1/8000s | 10.0/s | n | Y | |
14. | Sony A7R V | 9440 | n | 3.2 / 2100 | full-flex | Y | 1/8000s | 10.0/s | n | Y | |
15. | Sony A7S II | 2400 | n | 3.0 / 1229 | tilting | n | 1/8000s | 5.0/s | n | Y | |
16. | Sony A9 II | 3686 | n | 3.0 / 1440 | tilting | Y | 1/8000s | 20.0/s | n | Y | |
17. | Sony A99 | 2359 | Y | 3.0 / 1229 | full-flex | n | 1/8000s | 6.0/s | n | Y | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that differentiates the A9 and the D90 is in-body image stabilization (IBIS). The A9 reduces the risk of handshake-induced blur with all attached lenses, while the D90 offers no blur reduction with lenses that themselves do not provide optical image stabilization.
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 A9 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 A9 writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the D90 uses SDHC cards. The A9 features dual card slots, which can be very useful in case a memory card fails. In contrast, the D90 only has one slot. The A9 supports UHS-II cards on its first slot and UHS-I on its second one, 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 Sony Alpha A9 and Nikon D90 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. | Sony A9 | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | Y | |
2. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
3. | Canon 40D | Y | - / - | - | - | - | 2.0 | - | - | - | |
4. | Nikon D80 | Y | - / - | - | - | - | 2.0 | - | - | - | |
5. | Nikon D300S | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
6. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
7. | Nikon D7000 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
8. | Nikon Z6 | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
9. | Sony A7 II | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
10. | Sony A7 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | Y | Y | |
11. | Sony A7R II | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
12. | Sony A7R III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | Y | Y | |
13. | Sony A7R IIIA | Y | stereo / mono | Y | Y | micro | 3.2 | Y | Y | Y | |
14. | Sony A7R V | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
15. | Sony A7S II | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
16. | Sony A9 II | Y | stereo / mono | Y | Y | micro | 3.1 | Y | Y | Y | |
17. | Sony A99 | Y | stereo / mono | Y | Y | mini | 2.0 | - | - | - |
It is notable that the A9 has a microphone port, which is missing on the D90. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
Studio photographers will appreciate that the Sony A9 (unlike the D90) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the A9 and the D90 have been discontinued, but can regularly be found used on ebay. The D90 was replaced by the Nikon D7000, while the A9 was followed by the Sony A9 II. Further information on the features and operation of the A9 and D90 can be found, respectively, in the Sony A9 Manual (free pdf) or the online Nikon D90 Manual.
Review summary
So how do things add up? Is there a clear favorite between the Sony A9 and the Nikon D90? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Sony Alpha A9:
- More detail: Offers more megapixels (24 vs 12.2MP) with a 40% higher linear resolution.
- Better image quality: Scores substantially higher (19 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (2.2 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (0.8 EV of extra DR).
- Better low-light sensitivity: Requires less light for good images (1.8 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p 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 (0.78x vs 0.63x).
- More detailed LCD: Has a higher resolution rear screen (1440k vs 920k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (20 vs 4.5 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 weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- More legacy lens friendly: Can take a broad range of 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.
- 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 Ultra High Speed (UHS-II and UHS-I) SDXC cards.
- More modern: Reflects 8 years and 7 months of technical progress since the D90 launch.
Advantages of the Nikon D90:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- Longer lasting: Gets more shots (850 versus 650) out of a single battery charge.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was introduced into a lower priced category (71 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in August 2008).
If the count of individual advantages (bullet points above) is taken as a guide, the A9 is the clear winner of the match-up (29 : 6 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. 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 Sony A9 and the Nikon D90 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR 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 A9 or the D90. 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 hands-on reviews by experts 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. | Sony A9 | 5/5 | + + | 4.8/5 | 89/100 | 5/5 | 5/5 | Apr 2017 | 4,499 | ebay.com | |
2. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | 1,299 | ebay.com | |
3. | Canon 40D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2007 | 1,299 | ebay.com | |
4. | Nikon D80 | .. | + | .. | + + | o | 4.5/5 | Aug 2006 | 999 | ebay.com | |
5. | Nikon D300S | 5/5 | + + | .. | 82/100 | 4/5 | 4.5/5 | Jul 2009 | 1,799 | ebay.com | |
6. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | 749 | ebay.com | |
7. | Nikon D7000 | 4/5 | .. | .. | 80/100 | 4.5/5 | 4.5/5 | Sep 2010 | 1,499 | ebay.com | |
8. | Nikon Z6 | 5/5 | .. | 5/5 | 89/100 | 4.5/5 | 5/5 | Aug 2018 | 1,999 | ebay.com | |
9. | Sony A7 II | 5/5 | + | 4/5 | 82/100 | 4.5/5 | 5/5 | Nov 2014 | 1,999 | ebay.com | |
10. | Sony A7 III | .. | + + | 4.5/5 | 89/100 | 5/5 | 5/5 | Feb 2018 | 1,999 | amazon.com | |
11. | Sony A7R II | 5/5 | + + | 5/5 | 90/100 | 5/5 | 5/5 | Jun 2015 | 3,199 | ebay.com | |
12. | Sony A7R III | .. | + + | 4/5 | 90/100 | 4.5/5 | 5/5 | Oct 2017 | 3,199 | ebay.com | |
13. | Sony A7R IIIA | .. | + + | 4/5 | 90/100 | 4.5/5 | 5/5 | Apr 2021 | 3,199 | amazon.com | |
14. | Sony A7R V | 5/5 | + + | 4.5/5 | 92/100 | .. | .. | Oct 2022 | 3,899 | amazon.com | |
15. | Sony A7S II | 5/5 | + | .. | .. | 4.5/5 | 5/5 | Sep 2015 | 2,999 | ebay.com | |
16. | Sony A9 II | .. | .. | 5/5 | 90/100 | 5/5 | 5/5 | Oct 2019 | 4,499 | amazon.com | |
17. | Sony A99 | 5/5 | .. | .. | 84/100 | 4.5/5 | 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 ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.
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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon SX410 vs Nikon D90
- Canon SX410 vs Sony A9
- Canon T3i vs Nikon D90
- Fujifilm X100T vs Sony A9
- Leica V-LUX Typ 114 vs Sony A9
- Nikon D600 vs Sony A9
- Nikon D90 vs OM System OM-5
- Nikon D90 vs Olympus E-PL1
- Nikon D90 vs Panasonic FZ82
- Nikon D90 vs Sony NEX-C3
- Panasonic FZ1000 vs Sony A9
- Panasonic GX800 vs Sony A9
Specifications: Sony A9 vs Nikon D90
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 | Sony A9 | Nikon D90 |
---|---|---|
Camera Type | Mirrorless system camera | Digital single lens reflex |
Camera Lens | Sony E mount lenses | Nikon F mount lenses |
Launch Date | April 2017 | August 2008 |
Launch Price | USD 4,499 | USD 1,299 |
Sensor Specs | Sony A9 | Nikon D90 |
Sensor Technology | Stacked BSI-CMOS | CMOS |
Sensor Format | Full Frame Sensor | APS-C Sensor |
Sensor Size | 35.6 x 23.8 mm | 23.6 x 15.8 mm |
Sensor Area | 847.28 mm2 | 372.88 mm2 |
Sensor Diagonal | 42.8 mm | 28.4 mm |
Crop Factor | 1.0x | 1.5x |
Sensor Resolution | 24 Megapixels | 12.2 Megapixels |
Image Resolution | 6000 x 4000 pixels | 4288 x 2848 pixels |
Pixel Pitch | 5.94 μm | 5.53 μm |
Pixel Density | 2.83 MP/cm2 | 3.28 MP/cm2 |
Moiré control | Anti-Alias filter | Anti-Alias filter |
Movie Capability | 4K/30p Video | 720/24p Video |
ISO Setting | 100 - 51,200 ISO | 200 - 3,200 ISO |
ISO Boost | 50 - 204,800 ISO | 200 - 6,400 ISO |
Image Processor | BIONZ X | EXPEED |
DXO Sensor Quality (score) | 92 | 73 |
DXO Color Depth (bits) | 24.9 | 22.7 |
DXO Dynamic Range (EV) | 13.3 | 12.5 |
DXO Low Light (ISO) | 3517 | 977 |
Screen Specs | Sony A9 | Nikon D90 |
Viewfinder Type | Electronic viewfinder | Optical viewfinder |
Viewfinder Field of View | 100% | 96% |
Viewfinder Magnification | 0.78x | 0.63x |
Viewfinder Resolution | 3686k dots | |
Top-Level Screen | no Top Display | Control Panel |
LCD Framing | Live View | Live View |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 1440k dots | 920k dots |
LCD Attachment | Tilting screen | Fixed screen |
Touch Input | Touchscreen | no Touchscreen |
Shooting Specs | Sony A9 | Nikon D90 |
Focus System | On-Sensor Phase-detect | Phase-detect AF |
Manual Focusing Aid | Focus Peaking | no Peaking Feature |
Continuous Shooting | 20 shutter flaps/s | 4.5 shutter flaps/s |
Shutter Life Expectancy | 500 000 actuations | 100 000 actuations |
Electronic Shutter | up to 1/32000s | no E-Shutter |
Image Stabilization | In-body stabilization | Lens stabilization only |
Fill Flash | no On-Board Flash | Built-in Flash |
Storage Medium | MS or SDXC cards | SDHC cards |
Single or Dual Card Slots | Dual card slots | Single card slot |
UHS card support | Single UHS-II | no |
Connectivity Specs | Sony A9 | Nikon D90 |
External Flash | Hotshoe | Hotshoe |
Studio Flash | PC Sync socket | no PC Sync |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | micro HDMI | mini HDMI |
Microphone Port | External MIC port | no MIC socket |
Headphone Socket | Headphone port | no Headphone port |
Wifi Support | Wifi built-in | no Wifi |
Near-Field Communication | NFC built-in | no NFC |
Bluetooth Support | Bluetooth built-in | no Bluetooth |
Body Specs | Sony A9 | Nikon D90 |
Environmental Sealing | Weathersealed body | not weather sealed |
Battery Type | Sony NP-FZ100 | Nikon EN-EL3e |
Battery Life (CIPA) | 650 shots per charge | 850 shots per charge |
In-Camera Charging | USB charging | no USB charging |
Body Dimensions |
127 x 96 x 63 mm (5.0 x 3.8 x 2.5 in) |
132 x 103 x 77 mm (5.2 x 4.1 x 3.0 in) |
Camera Weight | 673 g (23.7 oz) | 703 g (24.8 oz) |
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