Sony A77 Comparison Review
The Sony Alpha SLT-A77 is a DSLR (Digital Single Lens Reflex) camera that was officially introduced in August 2011 and is equipped with an APS-C sensor. It offers a resolution of 24 megapixel.
Is the Sony A77 a good camera? The A77 has a Camera Elo of 1675. This rating puts the A77 among the top 50 percent of all digital single lens reflex cameras. In terms of its sensor size category (APS cameras), the A77 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 MP, APS-C Sensor|
|ISO 100 - 16 000 (50 - 25 600)|
|Electronic viewfinder (2359k dots)|
|3.0 LCD, 921k dots|
|Fully flexible screen (no touchscreen)|
|12 shutter flaps per second|
|470 shots per battery charge|
|143 x 104 x 81 mm, 732 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
An illustration of the physical dimensions of the Sony A77 vis-à-vis a credit card is provided in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.
The table below summarizes the key physical specs of the Sony A77 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 A77||5.6 in||4.1 in||3.2 in||25.8 oz||470||Y||Aug 2011||1,399|
|Canon 6D||5.7 in||4.4 in||2.8 in||27.2 oz||1090||Y||Sep 2012||2,099|
|Panasonic GH5||5.5 in||3.9 in||3.4 in||25.6 oz||410||Y||Jan 2017||1,999|
|Pentax K-3||5.2 in||3.9 in||3.0 in||28.2 oz||560||Y||Oct 2013||1,299|
|Sony A6600||4.7 in||2.6 in||2.7 in||17.7 oz||810||Y||Aug 2019||1,399|
|Sony A9||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499|
|Sony A6500||4.7 in||2.6 in||2.1 in||16.0 oz||350||Y||Oct 2016||1,399|
|Sony A68||5.6 in||4.1 in||3.2 in||21.5 oz||540||n||Nov 2015||699|
|Sony A7 II||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999|
|Sony A77 II||5.6 in||4.1 in||3.2 in||22.8 oz||480||Y||May 2014||1,199|
|Sony A99||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799|
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The Sony A77 was launched in the US market at a price of $1,399. 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 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tent to lead to bigger and heavier cameras and lenses.
The Sony A77 features an APS-C sensor and has a format factor (sometimes also referred to as "crop factor") of 1.5. Within the spectrum of camera sensors, this places the Sony A77 among the medium-sized sensor cameras that aim to strike a balance between image quality and portability.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Canon 6D||Full Frame||20.0||5472||3648||1080/30p||23.8||12.1||2340||82|
|Panasonic GH5||Four Thirds||20.2||5184||3888||4K/60p||23.9||13.0||807||77|
|Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony A77 II||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|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 A77 indeed provides movie recording capabilities. The highest resolution format that the A77 can use is 1080/60p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A77 has an electronic viewfinder with a resolution of 2359k dots. The viewfinder offers a field of view of 100% and a magnification of 0.73x. The tables below summarize some of the other core capabilities of the Sony A77 in connection with corresponding information for a sample of similar cameras.
|Sony A7 II||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||Y|
|Sony A77 II||2359||Y||3.0||1229||full-flex||n||1/8000s||12.0||Y||Y|
One convenient feature of the A77 is the presence of an on-board flash. While this built-in flash is not very powerful, it can at times be useful as a fill-in light to brighten deep shadow areas.
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 SLT-A77 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Sony A7 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
|Sony A77 II||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-|
It is notable that the A77 has a microphone port. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
While the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the A77. 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 expert reviews 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 A77||91/100||81/100||..||4.5/5||5/5||Aug 2011||1,399|
|Canon 6D||+ +||83/100||4.5/5||4.5/5||4.5/5||Sep 2012||2,099|
|Panasonic GH5||+ +||85/100||4.5/5||5/5||5/5||Jan 2017||1,999|
|Pentax K-3||..||83/100||5/5||4.5/5||5/5||Oct 2013||1,299|
|Sony A6600||+||83/100||4.5/5||..||4/5||Aug 2019||1,399|
|Sony A9||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499|
|Sony A6500||+ +||85/100||4.5/5||5/5||4.5/5||Oct 2016||1,399|
|Sony A68||..||..||4/5||..||4/5||Nov 2015||699|
|Sony A7 II||+||82/100||4.5/5||5/5||5/5||Nov 2014||1,999|
|Sony A77 II||..||80/100||4.5/5||4/5||5/5||May 2014||1,199|
|Sony A99||..||84/100||4.5/5||o||4.5/5||Sep 2012||2,799|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Sony A77 FAQ
Below are some additional questions and answers concerning some particular features of the A77.
What type of imaging sensor is used in the A77?
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 A77 with the BIONZ X image processor.
What is the ISO sensitivity range of the A77?
The camera has a native sensitivity range from ISO 100 to ISO 16000, which can be extended to ISO 50-25600.
Does the camera have a selfie-friendly screen?
Yes, the LCD-screen of the A77 is flexible and can be turned to be front-facing for capturing selfies.
What is the life expectancy of the shutter in the Sony Alpha SLT-A77?
Sony mentions a shutter rating of 150 000 actuations for the A77. This number represents a Mean Time before Failure, that is an average value. The shutter might fail earlier, or it might last longer. Anyway, in order to exhaust the expected shutter life of the A77 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 A77?
Sony embeds the number of shutter actuations in image metadata. You can check the number of shots that your A77 has taken up to now by uploading a recent image to the online shutter count app.
Is it difficult to use manual focus lenses with the Sony A77?
The A77 offers focus peaking as a manual focus aid. This feature works by placing a colored highlight on in-focus zones within the image.
Does the Sony A77 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 A77's flash sync speed is 1/250 sec.
Does the Sony A77 support the Ultra High Speed (UHS) bus interface for SD cards?
Yes, the camera can indeed use UHS-I cards (data transfer speed of up to 104 MB/s).
Which battery does the A77 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 A77?
Yes, Sony offers the VG-C77AM as an optional accessory to facilitate shooting in portrait orientation and to provide additional battery power.
Does the Sony Alpha SLT-A77 support geotagging?
The A77 has a built-in GPS (Global Positioning System) module and can embed location information in the EXIF data of the captured image.
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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
|Camera Model||Sony A77|
|Camera Type||Digital single lens reflex|
|Camera Lens||Sony A mount lenses|
|Launch Date||August 2011|
|Launch Price||USD 1 399|
|Sensor Format||APS-C Sensor|
|Sensor Size||23.5 x 15.6 mm|
|Sensor Area||367 mm2|
|Sensor Diagonal||28.2 mm|
|Sensor Resolution||24 Megapixels|
|Image Resolution||6 000 x 4 000 pixels|
|Pixel Pitch||3.91 μm|
|Pixel Density||6.55 MP/cm2|
|Moiré control||Anti-Alias filter|
|Movie Capability||1080/60p Video|
|ISO Setting||100 - 16 000 ISO|
|ISO Boost||50 - 25 600 ISO|
|Image Processor||BIONZ X|
|DXO Sensor Quality (score)||78|
|DXO Color Depth (bits)||24.0|
|DXO Dynamic Range (EV)||13.2|
|DXO Low Light (ISO)||801|
|Viewfinder Type||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2359k dots|
|Top-Level Screen||Control Panel|
|LCD Framing||Live View|
|LCD Size||921k dots|
|LCD Attachment||Fully flexible screen|
|Focus System||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking|
|Maximum Shutter Speed||1/8000s|
|Continuous Shooting||12 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||Build-in Flash|
|Storage Medium||MS or SDXC cards|
|Second Storage Option||Single card slot|
|UHS card support||UHS-I|
|Studio Flash||PC Sync socket|
|USB Connector||USB 2.0|
|HDMI Port||mini HDMI|
|Microphone Port||External MIC port|
|Wifi Support||no Wifi|
|Environmental Sealing||Weathersealed body|
|Battery Type||NP-FM500H power pack|
|Battery Life (CIPA)||470 shots per charge|
143 x 104 x 81 mm
(5.6 x 4.1 x 3.2 in)
|Camera Weight||732 g (25.8 oz)|
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