Sony A900 Comparison Review
The Sony Alpha A900 is a DSLR (Digital Single Lens Reflex) camera that was officially introduced in September 2008 and is equipped with a full frame sensor. It offers a resolution of 24.4 megapixel.
Is the Sony A900 a good camera? The A900 has a Camera Elo of 1999. This rating puts the A900 among the top 40 percent of all digital single lens reflex cameras. In terms of its sensor size category (full frame cameras), the A900 ranks below average. Based on its within category standings, the camera earns a 3-star performance rating.
|Digital single lens reflex|
|Sony A mount lenses|
|24.4 MP, Full Frame Sensor|
|ISO 200 - 3 200 (100 - 6 400)|
|3.0 LCD, 922k dots|
|Fixed screen (not touch-sensitive)|
|5 shutter flaps per second|
|880 shots per battery charge|
|156 x 117 x 82 mm, 895 g|
Read on to find out more about the camera's size, sensor, features, reception by expert reviewers, and how it compares to other digital cameras.
Body comparison with a credit card
The side-by-side display below illustrates the physical size of the Sony A900 vis-à-vis a credit card. Three consecutive perspectives from the front, the top, and the back are presented. All size dimensions are rounded to the nearest millimeter.
The table below summarizes the key physical specs of the Sony A900 alongside a set of comparators. If you want to review a camera pair side-by-side, just select a right-side 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 comparisons there.
|Sony A900||6.1 in||4.6 in||3.2 in||31.6 oz||880||Y||Sep 2008||2,999|
|Canon 5D Mark III||6.0 in||4.6 in||3.0 in||33.5 oz||950||Y||Mar 2012||3,499|
|Canon 5D Mark II||6.0 in||4.5 in||3.0 in||30.0 oz||850||Y||Sep 2008||3,499|
|Nikon D700||5.8 in||4.8 in||3.0 in||37.9 oz||1000||Y||Jul 2008||2,999|
|Panasonic S1||5.9 in||4.3 in||3.8 in||35.9 oz||400||Y||Feb 2019||2,499|
|Sony A7 III||5.0 in||3.8 in||2.9 in||22.9 oz||610||Y||Feb 2018||1,999|
|Sony A9||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499|
|Sony A99 II||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199|
|Sony A7S II||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999|
|Sony A99||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799|
|Sony A850||6.1 in||4.6 in||3.2 in||31.6 oz||880||Y||Aug 2009||1,999|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The Sony A900 was launched in the US market at a price of $2,999. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
Sensor comparison with a 35mm slide
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 tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. 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 tent to lead to bigger and heavier cameras and lenses.
The Sony A900 features a full frame sensor and has a format factor (sometimes also referred to as "crop factor") of 1.0. Within the spectrum of camera sensors, this places the Sony A900 among the large-sensor cameras that aim for top notch image quality.
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. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|Sony A900||Full Frame||24.4||6048||4032||none||23.7||12.3||1431||79|
|Canon 5D Mark III||Full Frame||22.1||5760||3840||1080/30p||24.0||11.7||2293||81|
|Canon 5D Mark II||Full Frame||21.0||5616||3744||1080/30p||23.7||11.9||1815||79|
|Nikon D700||Full Frame||12.1||4256||2832||none||23.5||12.2||2303||80|
|Panasonic S1||Full Frame||24.0||6000||4000||4K/60p||25.2||14.5||3333||95|
|Sony A7 III||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Sony A99||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
|Sony A850||Full Frame||24.4||6048||4032||none||23.8||12.2||1415||79|
It should be noted that unlike many modern cameras, the A900 does not provide the possibility to capture videos.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A900 has an optical viewfinder that provides a field of view of 100% and a magnification of 0.74x. The following tables report on some other key feature differences and similarities of the Sony A900 and comparable cameras.
|Canon 5D Mark III||optical||Y||3.2||1040||fixed||n||1/8000s||6.0||n||n|
|Canon 5D Mark II||optical||Y||3.0||920||fixed||n||1/8000s||3.9||n||n|
|Sony A7 III||2359||n||3.0||922||tilting||Y||1/8000s||10.0||n||Y|
|Sony A99 II||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y|
|Sony A7S II||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y|
One useful feature of the A900 is a presence of a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.
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 A900 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|Canon 5D Mark III||Y||mono||mono||Y||Y||mini||2.0||-||-||-|
|Canon 5D Mark II||Y||mono||mono||Y||-||mini||2.0||-||-||-|
|Sony A7 III||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y|
|Sony A99 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y|
|Sony A7S II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
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 handling experience and imaging performance when actually working with the A900. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why hands-on reviews by experts are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog).
|Sony A900||+ +||+ +||4.5/5||4/5||5/5||Sep 2008||2,999|
|Canon 5D Mark III||+ +||82/100||4.5/5||5/5||4.5/5||Mar 2012||3,499|
|Canon 5D Mark II||91/100||79/100||4/5||5/5||..||Sep 2008||3,499|
|Nikon D700||89/100||+ +||4.5/5||5/5||4.5/5||Jul 2008||2,999|
|Panasonic S1||+ +||88/100||4.5/5||..||4/5||Feb 2019||2,499|
|Sony A7 III||+ +||89/100||5/5||5/5||5/5||Feb 2018||1,999|
|Sony A9||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499|
|Sony A99 II||..||85/100||4.5/5||4.5/5||4.5/5||Sep 2016||3,199|
|Sony A7S II||+||..||4.5/5||5/5||5/5||Sep 2015||2,999|
|Sony A99||..||84/100||4.5/5||o||4.5/5||Sep 2012||2,799|
|Sony A850||..||75/100||..||4/5||4.5/5||Aug 2009||1,999|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated 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 comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Sony A900 FAQ
Below are some additional questions and answers concerning some particular features of the A900.
What technology is the imaging sensor in the A900 based on?
The camera is build around a CMOS (Complementary Metal–Oxide–Semiconductor) sensor.
Which image processing chip is used to convert the raw signal into an image file and perform noise reduction and image sharpening?
Sony equipped the A900 with the BIONZ image processor.
What is the ISO sensitivity range of the A900?
The camera has a native sensitivity range from ISO 200 to ISO 3200, which can be extended to ISO 100-6400.
What is the life expectancy of the shutter in the Sony Alpha A900?
Sony does not publish a shutter rating for the A900. Yet, shutters in comparable cameras from other manufacturers are said to be good for at least 150 000 actuations. It should be noted, though, that this number represents a Mean Time before Failure. The shutter might fail earlier, or it might last longer. Anyway, in order to exhaust an expected shutter life of 150 000 shots over, say, three years, one would have to take about 150 pictures each and every day.
How do I find the shutter count on my Sony A900?
Sony embeds the number of shutter actuations in image metadata. You can check the number of shots that your A900 has taken up to now by uploading a recent image to the online shutter count app.
Does the Sony A900 feature an autofocus assist light?
Yes, the camera has a lamp built-in that can illuminate the subject and improve autofocus in low-light settings.
What is the fastest shutter speed that can be used with flash?
The A900's flash sync speed is 1/250 sec.
Which battery does the A900 use?
The camera gets its power from the NP-FM500H (here at amazon), which is a rechargeable Lithium-Ion power pack.
Is there a vertical grip available for the A900?
Yes, Sony offers the VG-C90AM as an optional accessory to facilitate shooting in portrait orientation and to provide additional battery power.
Camera to camera comparisons
In case you would like to check on the differences and similarities with other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
|Camera Model||Sony A900|
|Camera Type||Digital single lens reflex|
|Camera Lens||Sony A mount lenses|
|Launch Date||September 2008|
|Launch Price||USD 2 999|
|Sensor Format||Full Frame Sensor|
|Sensor Size||35.9 x 24.0 mm|
|Sensor Area||862 mm2|
|Sensor Diagonal||43.2 mm|
|Sensor Resolution||24.4 Megapixels|
|Image Resolution||6 048 x 4 032 pixels|
|Pixel Pitch||5.94 μm|
|Pixel Density||2.83 MP/cm2|
|Moiré control||Anti-Alias filter|
|Movie Capability||no Video|
|ISO Setting||200 - 3 200 ISO|
|ISO Boost||100 - 6 400 ISO|
|DXO Sensor Quality (score)||79|
|DXO Color Depth (bits)||23.7|
|DXO Dynamic Range (EV)||12.3|
|DXO Low Light (ISO)||1431|
|Viewfinder Type||Optical viewfinder|
|Viewfinder Field of View||100%|
|Top-Level Screen||Control Panel|
|LCD Size||922k dots|
|LCD Attachment||Fixed screen|
|Focus System||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature|
|Maximum Shutter Speed||1/8000s|
|Continuous Shooting||5 shutter flaps/s|
|Shutter Life Expectancy||150 000 actuations|
|Silent Shooting||no E-Shutter|
|Time Lapse Photography||no Intervalometer|
|Image Stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash|
|Storage Medium||CF or MS cards|
|Second Storage Option||Dual card slots|
|Studio Flash||PC Sync socket|
|USB Connector||USB 2.0|
|HDMI Port||mini HDMI|
|Wifi Support||no Wifi|
|Environmental Sealing||Weathersealed body|
|Battery Type||NP-FM500H power pack|
|Battery Life (CIPA)||880 shots per charge|
156 x 117 x 82 mm
(6.1 x 4.6 x 3.2 in)
|Camera Weight||895 g (31.6 oz)|
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