Nikon D90 vs Sony A77
The Nikon D90 and the Sony Alpha SLT-A77 are two enthusiast cameras that were revealed to the public, respectively, in August 2008 and August 2011. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D90 and the Sony Alpha SLT-A77? 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 A77. 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 Sony A77 is notably larger (9 percent) than the Nikon D90. Moreover, the A77 is slightly heavier (4 percent) than the D90. It is noteworthy in this context that the A77 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. 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 D90 gets 850 shots out of its Nikon EN-EL3e battery, while the A77 can take 470 images on a single charge of its Sony NP-FM500H power pack.
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, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | 1,299 | ebay.com | |
2. | Sony A77 | 143 mm | 104 mm | 81 mm | 732 g | 470 | Y | Aug 2011 | 1,399 | ebay.com | |
3. | Canon 40D | 146 mm | 108 mm | 74 mm | 822 g | 750 | n | Aug 2007 | 1,299 | ebay.com | |
4. | Nikon D40X | 124 mm | 94 mm | 64 mm | 522 g | 520 | n | Mar 2007 | 729 | ebay.com | |
5. | Nikon D60 | 126 mm | 94 mm | 64 mm | 522 g | 500 | n | Jan 2008 | 629 | ebay.com | |
6. | Nikon D80 | 132 mm | 103 mm | 77 mm | 668 g | 600 | n | Aug 2006 | 999 | ebay.com | |
7. | Nikon D300 | 147 mm | 114 mm | 74 mm | 925 g | 1000 | Y | Aug 2007 | 1,799 | ebay.com | |
8. | Nikon D300S | 147 mm | 115 mm | 81 mm | 938 g | 950 | Y | Jul 2009 | 1,799 | ebay.com | |
9. | Nikon D3000 | 126 mm | 97 mm | 64 mm | 536 g | 500 | n | Jul 2009 | 599 | ebay.com | |
10. | Nikon D3100 | 124 mm | 96 mm | 75 mm | 505 g | 550 | n | Aug 2010 | 599 | ebay.com | |
11. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | 749 | ebay.com | |
12. | Nikon D7000 | 132 mm | 105 mm | 77 mm | 780 g | 1050 | Y | Sep 2010 | 1,499 | ebay.com | |
13. | Pentax K-3 | 131 mm | 100 mm | 77 mm | 800 g | 560 | Y | Oct 2013 | 1,299 | ebay.com | |
14. | Sony A7 II | 127 mm | 96 mm | 60 mm | 599 g | 350 | Y | Nov 2014 | 1,999 | ebay.com | |
15. | Sony A77 II | 143 mm | 104 mm | 81 mm | 647 g | 480 | Y | May 2014 | 1,199 | ebay.com | |
16. | Sony A99 | 147 mm | 111 mm | 78 mm | 812 g | 500 | Y | Sep 2012 | 2,799 | ebay.com | |
17. | Sony A6500 | 120 mm | 67 mm | 53 mm | 453 g | 350 | Y | Oct 2016 | 1,399 | ebay.com | |
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D90 was somewhat cheaper (by 7 percent) than the A77 at launch, but both cameras fall into the same price category. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the A77 is 2 percent smaller. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a slightly smaller sensor, the A77 offers a higher resolution of 24 megapixels, compared with 12.2 MP of the D90. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.91μm versus 5.53μm for the D90). However, it should be noted that the A77 is much more recent (by 2 years and 11 months) than the D90, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
The resolution advantage of the Sony A77 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 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 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 SLT-A77 are ISO 100 to ISO 16000, with the possibility to increase the ISO range to 50-25600.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
For many cameras, data on sensor performance has been reported by DXO Mark. 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 A77 has a markedly higher DXO score than the D90 (overall score 5 points higher), which will translate into better image quality. The advantage is based on 1.3 bits higher color depth, 0.7 EV in additional dynamic range, and 0.3 stops of reduced 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. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
2. | Sony A77 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.0 | 13.2 | 801 | 78 | |
3. | Canon 40D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.3 | 703 | 64 | |
4. | Nikon D40X | APS-C | 10.0 | 3872 | 2592 | none | 22.4 | 11.4 | 516 | 63 | |
5. | Nikon D60 | APS-C | 10.0 | 3872 | 2592 | none | 22.5 | 11.4 | 562 | 65 | |
6. | Nikon D80 | APS-C | 10.0 | 3872 | 2592 | none | 22.1 | 11.2 | 524 | 61 | |
7. | Nikon D300 | APS-C | 12.2 | 4288 | 2848 | none | 22.1 | 12.0 | 679 | 67 | |
8. | Nikon D300S | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.5 | 12.2 | 787 | 70 | |
9. | Nikon D3000 | APS-C | 10.0 | 3872 | 2592 | none | 22.3 | 11.1 | 563 | 62 | |
10. | Nikon D3100 | APS-C | 14.2 | 4608 | 3072 | 1080/24p | 22.5 | 11.3 | 919 | 67 | |
11. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
12. | Nikon D7000 | APS-C | 16.1 | 4928 | 3264 | 1080/24p | 23.5 | 13.9 | 1167 | 80 | |
13. | Pentax K-3 | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.7 | 13.4 | 1216 | 80 | |
14. | Sony A7 II | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 24.9 | 13.6 | 2449 | 90 | |
15. | Sony A77 II | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.4 | 13.4 | 1013 | 82 | |
16. | Sony A99 | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 25.0 | 14.0 | 1555 | 89 | |
17. | Sony A6500 | APS-C | 24.0 | 6000 | 4000 | 4K/30p | 24.5 | 13.7 | 1405 | 85 |
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 A77 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 variety of features. For example, the A77 has an electronic viewfinder (2359k 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 A77 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 A77 has a higher magnification (0.73x vs 0.63x), 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 D90, the Sony A77, and comparable cameras.
Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
2. | Sony A77 | 2359 | Y | 3.0 / 921 | full-flex | n | 1/8000s | 12.0/s | Y | Y | |
3. | Canon 40D | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 6.5/s | Y | n | |
4. | Nikon D40X | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
5. | Nikon D60 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
6. | Nikon D80 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
7. | Nikon D300 | optical | Y | 3.0 / 922 | fixed | n | 1/8000s | 6.0/s | Y | n | |
8. | Nikon D300S | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 7.0/s | Y | n | |
9. | Nikon D3000 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
10. | Nikon D3100 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
11. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
12. | Nikon D7000 | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 6.0/s | Y | n | |
13. | Pentax K-3 | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | Y | Y | |
14. | Sony A7 II | 2400 | n | 3.0 / 1230 | tilting | n | 1/8000s | 5.0/s | n | Y | |
15. | Sony A77 II | 2359 | Y | 3.0 / 1229 | full-flex | n | 1/8000s | 12.0/s | Y | Y | |
16. | Sony A99 | 2359 | Y | 3.0 / 1229 | full-flex | n | 1/8000s | 6.0/s | n | Y | |
17. | Sony A6500 | 2359 | n | 3.0 / 922 | tilting | Y | 1/4000s | 11.0/s | Y | Y | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that differentiates the A77 and the D90 is in-body image stabilization (IBIS). The A77 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 A77 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the D90 does not have a selfie-screen.The D90 writes its imaging data to SDHC cards, while the A77 uses SDXC or Memory Stick PRO Duo cards. The A77 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 SLT-A77 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
2. | Sony A77 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
3. | Canon 40D | Y | - / - | - | - | - | 2.0 | - | - | - | |
4. | Nikon D40X | Y | - / - | - | - | - | 2.0 | - | - | - | |
5. | Nikon D60 | Y | - / - | - | - | - | 2.0 | - | - | - | |
6. | Nikon D80 | Y | - / - | - | - | - | 2.0 | - | - | - | |
7. | Nikon D300 | Y | - / - | - | - | mini | 2.0 | - | - | - | |
8. | Nikon D300S | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
9. | Nikon D3000 | Y | - / - | - | - | - | 2.0 | - | - | - | |
10. | Nikon D3100 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
11. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
12. | Nikon D7000 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
13. | Pentax K-3 | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
14. | Sony A7 II | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
15. | Sony A77 II | Y | stereo / mono | Y | - | mini | 2.0 | Y | Y | - | |
16. | Sony A99 | Y | stereo / mono | Y | Y | mini | 2.0 | - | - | - | |
17. | Sony A6500 | Y | stereo / mono | Y | - | micro | 2.0 | Y | Y | - |
It is notable that the A77 has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The D90 does not feature such a mic input.
Studio photographers will appreciate that the Sony A77 (unlike the D90) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Travel and landscape photographers will find it useful that the A77 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
Both the D90 and the A77 have been discontinued, but can regularly be found used on ebay. The D90 was replaced by the Nikon D7000, while the A77 was followed by the Sony A77 II. Further information on the features and operation of the D90 and A77 can be found, respectively, in the Nikon D90 Manual (free pdf) or the online Sony A77 Manual.
Review summary
So what conclusions can be drawn? Is there a clear favorite between the Nikon D90 and the Sony A77? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Nikon D90:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (850 versus 470) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in August 2008).
Reasons to prefer the Sony Alpha SLT-A77:
- More detail: Has more megapixels (24 vs 12.2MP), which boosts linear resolution by 40%.
- Better image quality: Scores markedly higher (5 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.3 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (0.7 EV of extra DR).
- Better video: Provides higher definition movie capture (1080/60p vs 720/24p).
- Better sound: Can connect to an external microphone for higher quality sound recording.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 96%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.63x).
- More flexible LCD: Has a full-flex 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.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 4.5 flaps/sec) to capture the decisive moment.
- 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.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 2 years and 11 months of technical progress since the D90 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the A77 is the clear winner of the contest (19 : 3 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 D90 and the Sony A77 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the D90 or the A77. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
Expert reviews
This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | 1,299 | ebay.com | |
2. | Sony A77 | 5/5 | 91/100 | .. | 81/100 | .. | 5/5 | Aug 2011 | 1,399 | ebay.com | |
3. | Canon 40D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2007 | 1,299 | ebay.com | |
4. | Nikon D40X | .. | 79/100 | .. | + + | 4/5 | 4/5 | Mar 2007 | 729 | ebay.com | |
5. | Nikon D60 | .. | 80/100 | .. | + + | 4/5 | 4.5/5 | Jan 2008 | 629 | ebay.com | |
6. | Nikon D80 | .. | + | .. | + + | o | 4.5/5 | Aug 2006 | 999 | ebay.com | |
7. | Nikon D300 | .. | + + | .. | + + | 5/5 | 4.5/5 | Aug 2007 | 1,799 | ebay.com | |
8. | Nikon D300S | 5/5 | + + | .. | 82/100 | 4/5 | 4.5/5 | Jul 2009 | 1,799 | ebay.com | |
9. | Nikon D3000 | .. | + | .. | 72/100 | 4/5 | 4.5/5 | Jul 2009 | 599 | ebay.com | |
10. | Nikon D3100 | 5/5 | + + | .. | 72/100 | 4.5/5 | 4.5/5 | Aug 2010 | 599 | ebay.com | |
11. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | 749 | ebay.com | |
12. | Nikon D7000 | 4/5 | .. | .. | 80/100 | 4.5/5 | 4.5/5 | Sep 2010 | 1,499 | ebay.com | |
13. | Pentax K-3 | 4/5 | .. | .. | 83/100 | 5/5 | 5/5 | Oct 2013 | 1,299 | ebay.com | |
14. | Sony A7 II | 5/5 | + | 4/5 | 82/100 | 4.5/5 | 5/5 | Nov 2014 | 1,999 | ebay.com | |
15. | Sony A77 II | 4/5 | .. | .. | 80/100 | 4.5/5 | 5/5 | May 2014 | 1,199 | ebay.com | |
16. | Sony A99 | 5/5 | .. | .. | 84/100 | 4.5/5 | 4.5/5 | Sep 2012 | 2,799 | ebay.com | |
17. | Sony A6500 | 5/5 | + + | 3.5/5 | 85/100 | 4.5/5 | 4.5/5 | Oct 2016 | 1,399 | ebay.com | |
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. |
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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 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 D90 vs Sony A77
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 D90 | Sony A77 |
---|---|---|
Camera Type | Digital single lens reflex | Digital single lens reflex |
Camera Lens | Nikon F mount lenses | Sony A mount lenses |
Launch Date | August 2008 | August 2011 |
Launch Price | USD 1,299 | USD 1,399 |
Sensor Specs | Nikon D90 | Sony A77 |
Sensor Technology | CMOS | CMOS |
Sensor Format | APS-C Sensor | APS-C Sensor |
Sensor Size | 23.6 x 15.8 mm | 23.5 x 15.6 mm |
Sensor Area | 372.88 mm2 | 366.6 mm2 |
Sensor Diagonal | 28.4 mm | 28.2 mm |
Crop Factor | 1.5x | 1.5x |
Sensor Resolution | 12.2 Megapixels | 24 Megapixels |
Image Resolution | 4288 x 2848 pixels | 6000 x 4000 pixels |
Pixel Pitch | 5.53 μm | 3.91 μm |
Pixel Density | 3.28 MP/cm2 | 6.55 MP/cm2 |
Moiré control | Anti-Alias filter | Anti-Alias filter |
Movie Capability | 720/24p Video | 1080/60p Video |
ISO Setting | 200 - 3,200 ISO | 100 - 16,000 ISO |
ISO Boost | 200 - 6,400 ISO | 50 - 25,600 ISO |
Image Processor | EXPEED | BIONZ X |
DXO Sensor Quality (score) | 73 | 78 |
DXO Color Depth (bits) | 22.7 | 24.0 |
DXO Dynamic Range (EV) | 12.5 | 13.2 |
DXO Low Light (ISO) | 977 | 801 |
Screen Specs | Nikon D90 | Sony A77 |
Viewfinder Type | Optical viewfinder | Electronic viewfinder |
Viewfinder Field of View | 96% | 100% |
Viewfinder Magnification | 0.63x | 0.73x |
Viewfinder Resolution | 2359k dots | |
Top-Level Screen | Control Panel | Control Panel |
LCD Framing | Live View | Live View |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 920k dots | 921k dots |
LCD Attachment | Fixed screen | Fully flexible screen |
Shooting Specs | Nikon D90 | Sony A77 |
Focus System | Phase-detect AF | Phase-detect AF |
Manual Focusing Aid | no Peaking Feature | Focus Peaking |
Max Shutter Speed (mechanical) | 1/4000s | 1/8000s |
Continuous Shooting | 4.5 shutter flaps/s | 12 shutter flaps/s |
Shutter Life Expectancy | 100 000 actuations | 150 000 actuations |
Image Stabilization | Lens stabilization only | In-body stabilization |
Fill Flash | Built-in Flash | Built-in Flash |
Storage Medium | SDHC cards | MS or SDXC cards |
Single or Dual Card Slots | Single card slot | Single card slot |
UHS card support | no | UHS-I |
Connectivity Specs | Nikon D90 | Sony A77 |
External Flash | Hotshoe | Hotshoe |
Studio Flash | no PC Sync | PC Sync socket |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | mini HDMI | mini HDMI |
Microphone Port | no MIC socket | External MIC port |
Wifi Support | no Wifi | no Wifi |
Geotagging | no internal GPS | GPS built-in |
Body Specs | Nikon D90 | Sony A77 |
Environmental Sealing | not weather sealed | Weathersealed body |
Battery Type | Nikon EN-EL3e | Sony NP-FM500H |
Battery Life (CIPA) | 850 shots per charge | 470 shots per charge |
Body Dimensions |
132 x 103 x 77 mm (5.2 x 4.1 x 3.0 in) |
143 x 104 x 81 mm (5.6 x 4.1 x 3.2 in) |
Camera Weight | 703 g (24.8 oz) | 732 g (25.8 oz) |
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