Sony A7 II vs A77
The Sony Alpha A7 II and the Sony Alpha SLT-A77 are two enthusiast cameras that were officially introduced, respectively, in November 2014 and August 2011. The A7 II is a mirrorless interchangeable lens camera, while the A77 is a DSLR. The cameras are based on a full frame (A7 II) and an APS-C (A77) sensor. Both cameras offer a resolution of 24 megapixels.
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 A7 II 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.
The side-by-side display below illustrates the physical size and weight of the Sony A7 II 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 size dimensions 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 (22 percent) than the Sony A7 II. Moreover, the A77 is markedly heavier (22 percent) than the A7 II. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
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 A7 II gets 350 shots out of its NP-FW50 battery, while the A77 can take 470 images on a single charge of its NP-FM500H power pack. The power pack in the A7 II can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.
|1.||Sony A7 II||127 mm||96 mm||60 mm||599 g||350||Y||Nov 2014||1,999|
|2.||Sony A77||143 mm||104 mm||81 mm||732 g||470||Y||Aug 2011||1,399|
|3.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|4.||Sony A7C||124 mm||71 mm||60 mm||509 g||740||Y||Sep 2020||1,799|
|5.||Sony A9 II||129 mm||96 mm||76 mm||678 g||690||Y||Oct 2019||4,499|
|6.||Sony A7 III||127 mm||96 mm||74 mm||650 g||610||Y||Feb 2018||1,999|
|7.||Sony A7R III||127 mm||96 mm||74 mm||650 g||650||Y||Oct 2017||3,199|
|8.||Sony A9||127 mm||96 mm||63 mm||673 g||650||Y||Apr 2017||4,499|
|9.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399|
|10.||Sony A7R II||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199|
|11.||Sony A7S II||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999|
|12.||Sony A77 II||143 mm||104 mm||81 mm||647 g||480||Y||May 2014||1,199|
|13.||Sony A7||127 mm||94 mm||48 mm||474 g||340||Y||Oct 2013||1,699|
|14.||Sony A7R||127 mm||94 mm||48 mm||465 g||340||Y||Oct 2013||2,299|
|15.||Sony A99||147 mm||111 mm||78 mm||812 g||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.|
Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The A77 was launched at a markedly lower price (by 30 percent) than the A7 II, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 Sony A7 II features a full frame sensor and the Sony A77 an APS-C sensor. The sensor area in the A77 is 57 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.
Even though the A7 II has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the A7 II has a lower pixel density and larger individual pixels (with a pixel pitch of 5.97μm versus 3.91μm for the A77), which gives it a potential advantage in terms of light gathering capacity. In addition, the A7 II is much more recent (by 3 years and 2 months) than the A77, and its sensor will have benefitted from technological advances during this time.
The A7 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Sony Alpha A7 II has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-51200. 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.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 review, the A7 II provides substantially higher image quality than the A77, with an overall score that is 12 points higher. This advantage is based on 0.9 bits higher color depth, 0.4 EV in additional dynamic range, and 1.6 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|1.||Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|4.||Sony A7C||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3407||95|
|5.||Sony A9 II||Full Frame||24.0||6000||4000||4K/30p||25.0||14.0||3434||93|
|6.||Sony A7 III||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|7.||Sony A7R III||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|8.||Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|10.||Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|11.||Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|12.||Sony A77 II||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|13.||Sony A7||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
|14.||Sony A7R||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95|
|15.||Sony A99||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (1080/60p).
Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the A7 II offers a slightly higher resolution than the one in the A77 (2400k vs 2359k dots). The adjacent table lists some of the other core features of the Sony A7 II and Sony A77 along with similar information for a selection of comparators.
|1.||Sony A7 II||2400||n||3.0 / 1230||tilting||n||1/8000s||5.0||n||Y|
|2.||Sony A77||2359||Y||3.0 / 921||full-flex||n||1/8000s||12.0||Y||Y|
|3.||Pentax K-3||optical||Y||3.2 / 1037||fixed||n||1/8000s||8.3||Y||Y|
|4.||Sony A7C||2360||n||3.0 / 922||swivel||Y||1/4000s||10.0||n||Y|
|5.||Sony A9 II||3686||n||3.0 / 1440||tilting||Y||1/8000s||20.0||n||Y|
|6.||Sony A7 III||2359||n||3.0 / 922||tilting||Y||1/8000s||10.0||n||Y|
|7.||Sony A7R III||3686||n||3.0 / 1440||tilting||Y||1/8000s||10.0||n||Y|
|8.||Sony A9||3686||n||3.0 / 1440||tilting||Y||1/8000s||20.0||n||Y|
|9.||Sony A6500||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0||Y||Y|
|10.||Sony A7R II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0||n||Y|
|11.||Sony A7S II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0||n||Y|
|12.||Sony A77 II||2359||Y||3.0 / 1229||full-flex||n||1/8000s||12.0||Y||Y|
|13.||Sony A7||2400||n||3.0 / 1230||tilting||n||1/8000s||5.0||n||n|
|14.||Sony A7R||2400||n||3.0 / 1230||tilting||n||1/8000s||4.0||n||n|
|15.||Sony A99||2359||Y||3.0 / 1229||full-flex||n||1/8000s||6.0||n||Y|
One feature that is present on the A77, but is missing on the A7 II is 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.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 A7 II does not have a selfie-screen.
Concerning the storage of imaging data, both the A7 II and the A77 write their files to SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 A7 II and Sony Alpha SLT-A77 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Sony A7 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|2.||Sony A77||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|3.||Pentax K-3||Y||mono / mono||Y||Y||mini||3.0||-||-||-|
|4.||Sony A7C||Y||stereo / mono||Y||Y||micro||3.2||Y||Y||Y|
|5.||Sony A9 II||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|6.||Sony A7 III||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|7.||Sony A7R III||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|8.||Sony A9||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||Y|
|9.||Sony A6500||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|10.||Sony A7R II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|11.||Sony A7S II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|12.||Sony A77 II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|13.||Sony A7||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|14.||Sony A7R||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|15.||Sony A99||Y||stereo / mono||Y||Y||mini||2.0||-||-||-|
It is notable that the A7 II has a headphone jack, which is not present on the A77 This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.
Studio photographers will appreciate that the Sony A77 (unlike the A7 II) 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 A7 II and the A77 have been discontinued, but can regularly be found used on eBay. The A77 was replaced by the Sony A77 II, while the A7 II was followed by the Sony A7 III. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.
So how do things add up? Which of the two cameras – the Sony A7 II or the Sony A77 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Sony Alpha A7 II:
- Better image quality: Scores substantially higher (12 points) in the DXO overall assessment.
- Better low-light sensitivity: Requires less light for good images (1.6 stops ISO advantage).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- More detailed LCD: Has a higher resolution rear screen (1230k vs 921k dots).
- More compact: Is smaller (127x96mm vs 143x104mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 133g or 18 percent) and hence easier to carry around.
- Easier travel charging: Can be conveniently charged via its USB port.
- 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.
- More modern: Reflects 3 years and 2 months of technical progress since the A77 launch.
Advantages of the Sony Alpha SLT-A77:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.71x).
- Easier setting verification: Features a control panel on top to check shooting parameters.
- 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 burst: Shoots at higher frequency (12 vs 5 flaps/sec) to capture the decisive moment.
- Longer lasting: Gets more shots (470 versus 350) out of a single battery charge.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- 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.
- More affordable: Was introduced into a lower priced category (30 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in August 2011).
If the number of relative strengths (bullet points above) is taken as a guide, the A7 II comes out slightly ahead of the A77 (12 : 11 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 A7 II and the Sony A77 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 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 A7 II or the A77. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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.
|1.||Sony A7 II||5/5||+||4/5||82/100||4.5/5||5/5||Nov 2014||1,999|
|2.||Sony A77||5/5||91/100||..||81/100||..||5/5||Aug 2011||1,399|
|3.||Pentax K-3||4/5||..||..||83/100||5/5||5/5||Oct 2013||1,299|
|4.||Sony A7C||3.5/5||..||3.5/5||86/100||4/5||4/5||Sep 2020||1,799|
|5.||Sony A9 II||..||..||5/5||90/100||5/5||5/5||Oct 2019||4,499|
|6.||Sony A7 III||..||+ +||4.5/5||89/100||5/5||5/5||Feb 2018||1,999|
|7.||Sony A7R III||..||+ +||4/5||90/100||4.5/5||5/5||Oct 2017||3,199|
|8.||Sony A9||5/5||+ +||4.8/5||89/100||5/5||5/5||Apr 2017||4,499|
|9.||Sony A6500||5/5||+ +||3.5/5||85/100||4.5/5||4.5/5||Oct 2016||1,399|
|10.||Sony A7R II||5/5||+ +||5/5||90/100||5/5||5/5||Jun 2015||3,199|
|11.||Sony A7S II||5/5||+||..||..||4.5/5||5/5||Sep 2015||2,999|
|12.||Sony A77 II||4/5||..||..||80/100||4.5/5||5/5||May 2014||1,199|
|13.||Sony A7||5/5||+ +||..||80/100||5/5||5/5||Oct 2013||1,699|
|14.||Sony A7R||5/5||+ +||..||82/100||4.5/5||5/5||Oct 2013||2,299|
|15.||Sony A99||5/5||..||..||84/100||4.5/5||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 ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price 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.
Other camera comparisons
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Specifications: Sony A7 II 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||Sony A7 II||Sony A77|
|Camera Type||Mirrorless system camera||Digital single lens reflex|
|Camera Lens||Sony E mount lenses||Sony A mount lenses|
|Launch Date||November 2014||August 2011|
|Launch Price||USD 1,999||USD 1,399|
|Sensor Specs||Sony A7 II||Sony A77|
|Sensor Format||Full Frame Sensor||APS-C Sensor|
|Sensor Size||35.8 x 23.9 mm||23.5 x 15.6 mm|
|Sensor Area||855.62 mm2||366.6 mm2|
|Sensor Diagonal||43 mm||28.2 mm|
|Sensor Resolution||24 Megapixels||24 Megapixels|
|Image Resolution||6000 x 4000 pixels||6000 x 4000 pixels|
|Pixel Pitch||5.97 μm||3.91 μm|
|Pixel Density||2.80 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||100 - 25,600 ISO||100 - 16,000 ISO|
|ISO Boost||50 - 51,200 ISO||50 - 25,600 ISO|
|Image Processor||BIONZ X||BIONZ X|
|DXO Sensor Quality (score)||90||78|
|DXO Color Depth (bits)||24.9||24.0|
|DXO Dynamic Range (EV)||13.6||13.2|
|DXO Low Light (ISO)||2449||801|
|Screen Specs||Sony A7 II||Sony A77|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2400k dots||2359k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1230k dots||921k dots|
|LCD Attachment||Tilting screen||Fully flexible screen|
|Shooting Specs||Sony A7 II||Sony A77|
|Focus System||On-Sensor Phase-detect||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/8000s|
|Continuous Shooting||5 shutter flaps/s||12 shutter flaps/s|
|Shutter Life Expectancy||200 000 actuations||150 000 actuations|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash||Built-in Flash|
|Storage Medium||MS or SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Sony A7 II||Sony A77|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||mini HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||Headphone port||no Headphone port|
|Wifi Support||Wifi built-in||no Wifi|
|Near-Field Communication||NFC built-in||no NFC|
|Geotagging||no internal GPS||GPS built-in|
|Body Specs||Sony A7 II||Sony A77|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||350 shots per charge||470 shots per charge|
|In-Camera Charging||USB charging||no USB charging|
127 x 96 x 60 mm
(5.0 x 3.8 x 2.4 in)
143 x 104 x 81 mm
(5.6 x 4.1 x 3.2 in)
|Camera Weight||599 g (21.1 oz)||732 g (25.8 oz)|
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