Sony A77 II versus Panasonic GX7
The Sony Alpha SLT-A77 II and the Panasonic Lumix DMC-GX7 are two enthusiast cameras that were announced, respectively, in May 2014 and August 2013. The A77 II is a DSLR, while the GX7 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (A77 II) and a Four Thirds sensor. The Sony has a resolution of 24 megapixel, whereas the Panasonic provides 15.8 MP.
An illustration of the physical size and weight of the Sony A77 II and the Panasonic GX7 is provided in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All size dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the A77 II – represents 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX7 is considerably smaller (41 percent) than the Sony A77 II. Moreover, the GX7 is substantially lighter (38 percent) than the A77 II. It is worth mentioning in this context that the A77 II is splash and dust resistant, while the GX7 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 the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left 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.
|Camera Body Specifications
|Sony A77 II (⇒ rgt)||143 mm||104 mm||81 mm||647 g||480||YES||2014||1,199||latest||check|
|Panasonic GX7 (⇒ lft)||123 mm||71 mm||55 mm||402 g||350||no||2013||999||discont.||check|
|Nikon D7200 (⇒ lft | rgt)||136 mm||107 mm||76 mm||765 g||1110||YES||2015||1,199||discont.||check|
|Olympus E-M10 (⇒ lft | rgt)||119 mm||82 mm||46 mm||396 g||320||no||2014||699||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||122 mm||69 mm||37 mm||420 g||330||no||2013||999||discont.||check|
|Panasonic G85 (⇒ lft | rgt)||128 mm||89 mm||74 mm||505 g||330||YES||2016||899||latest||check|
|Panasonic GX8 (⇒ lft | rgt)||133 mm||78 mm||63 mm||487 g||330||YES||2015||1,199||discont.||check|
|Panasonic G6 (⇒ lft | rgt)||122 mm||85 mm||71 mm||390 g||340||no||2013||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||99 mm||55 mm||30 mm||204 g||230||no||2013||749||discont.||check|
|Pentax K-3 II (⇒ lft | rgt)||131 mm||100 mm||77 mm||800 g||720||YES||2015||1,099||latest||check|
|Pentax K-3 (⇒ lft | rgt)||131 mm||100 mm||77 mm||800 g||560||YES||2013||1,299||discont.||check|
|Sony A9 (⇒ lft | rgt)||127 mm||96 mm||63 mm||673 g||650||YES||2017||4,499||latest||check|
|Sony A6500 (⇒ lft | rgt)||120 mm||67 mm||53 mm||453 g||350||YES||2016||1,399||latest||check|
|Sony RX10 II (⇒ lft | rgt)||129 mm||88 mm||102 mm||813 g||400||YES||2015||1,299||discont.||check|
|Sony A7 II (⇒ lft | rgt)||127 mm||96 mm||60 mm||599 g||350||YES||2014||1,999||discont.||check|
|Sony RX10 (⇒ lft | rgt)||129 mm||88 mm||102 mm||813 g||420||YES||2013||1,299||discont.||check|
|Sony A77 (⇒ lft | rgt)||143 mm||104 mm||81 mm||732 g||470||YES||2011||1,999||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GX7 was launched at a somewhat lower price (by 17 percent) than the A77 II, which makes it more attractive for photographers on a tight budget. 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.
The size of the imaging sensor is a crucial determinant 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. 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.
Of the two cameras under consideration, the Sony A77 II features an APS-C sensor and the Panasonic GX7 a Four Thirds sensor. The sensor area in the GX7 is 39 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the A77 II has a native 3:2 aspect ratio, while the one in the GX7 offers a 4:3 aspect.
With 24MP, the A77 II offers a higher resolution than the GX7 (15.8MP), but the A77 II nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 3.77μm for the GX7) due to its larger sensor. Moreover, the A77 II is a somewhat more recent model (by 8 months) than the GX7, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.
Consistent information on actual sensor performance is available from DXO Mark for most cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Sony A77 II (⇒ rgt)||APS-C||24.0||6000||4000||1080/60p||-||-||-||-|
|Panasonic GX7 (⇒ lft)||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
|Nikon D7200 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||24.5||14.6||1333||87|
|Olympus E-M10 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||884||72|
|Olympus E-P5 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.4||895||72|
|Panasonic G85 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||4K/30p||22.8||12.5||656||71|
|Panasonic GX8 (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|Panasonic G6 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|Panasonic GM1 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
|Pentax K-3 II (⇒ lft | rgt)||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80|
|Pentax K-3 (⇒ lft | rgt)||APS-C||24.1||6016||4000||1080/60i||23.7||13.4||1216||80|
|Sony A9 (⇒ lft | rgt)||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Sony A6500 (⇒ lft | rgt)||APS-C||24.0||6000||4000||4K/30p||24.5||13.7||1405||85|
|Sony RX10 II (⇒ lft | rgt)||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70|
|Sony A7 II (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony RX10 (⇒ lft | rgt)||1-inch||20.0||5472||3648||1080/60p||22.9||12.6||474||69|
|Sony A77 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||24||13.2||801||78|
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, and both provide the same movie specifications (1080/60p).
Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the GX7 offers a higher resolution than the one in the A77 II (2760k vs 2359k dots). The table below summarizes some of the other core capabilities of the Sony A77 II and Panasonic GX7 in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.
|Sony A77 II (⇒ rgt)||2359||YES||3.0||1229||full-flex||no||8000||12.0||12||YES|
|Panasonic GX7 (⇒ lft)||2760||no||3.0||1040||tilting||YES||8000||5.0||7||YES|
|Nikon D7200 (⇒ lft | rgt)||optical||YES||3.2||1229||fixed||no||8000||6.0||12||no|
|Olympus E-M10 (⇒ lft | rgt)||1440||no||3.0||1037||tilting||YES||4000||8.0||5.8||YES|
|Olympus E-P5 (⇒ lft | rgt)||no||no||3.0||1037||tilting||YES||8000||9.0||7||YES|
|Panasonic G85 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||4000||9.0||6.2||YES|
|Panasonic GX8 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||8000||10.0||no||YES|
|Panasonic G6 (⇒ lft | rgt)||1440||no||3.0||1036||swivel||YES||4000||7.0||10.5||no|
|Panasonic GM1 (⇒ lft | rgt)||no||no||3.0||1036||fixed||YES||500||5.0||4||no|
|Pentax K-3 II (⇒ lft | rgt)||optical||YES||3.2||1037||fixed||no||8000||8.3||no||YES|
|Pentax K-3 (⇒ lft | rgt)||optical||YES||3.2||1037||fixed||no||8000||8.3||13||YES|
|Sony A9 (⇒ lft | rgt)||3686||no||3.0||1440||tilting||YES||8000||20.0||no||YES|
|Sony A6500 (⇒ lft | rgt)||2300||no||3.0||922||tilting||YES||4000||11.0||6||YES|
|Sony RX10 II (⇒ lft | rgt)||2359||YES||3.0||1229||tilting||no||3200||14.0||10.2||YES|
|Sony A7 II (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||YES|
|Sony RX10 (⇒ lft | rgt)||1440||YES||3.0||1229||tilting||no||3200||10.0||10.2||YES|
|Sony A77 (⇒ lft | rgt)||2359||YES||3.0||921||full-flex||no||8000||12.0||12||YES|
The A77 II is a current model that online retailers, such as amazon, will have in stock. In contrast, the GX7 has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the GX7 was succeeded by the Panasonic GX85.
So what conclusions can be drawn? Which of the two cameras – the Sony A77 II or the Panasonic GX7 – has the upper hand? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Sony Alpha SLT-A77 II:
- More detail: Offers more megapixels (24 vs 15.8MP) with a 26% higher linear resolution.
- Better image quality: Features a larger and more technologically advanced imaging sensor.
- Easier setting verification: Has an LCD display on top to control shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
- More flexible LCD: Has full-flex screen for odd-angle shots in portrait or landscape orientation.
- Faster burst: Shoots at higher frequency (12 vs 5 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (480 versus 350) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- More modern: Is somewhat more recent (announced 8 months after the GX7).
Arguments in favor of the Panasonic Lumix DMC-GX7:
- More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 2359k dots).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More compact: Is smaller (123x71mm vs 143x104mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 245g or 38 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More affordable: Was released into a lower priced segment (17 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in August 2013).
If the count of individual advantages (bullet points above) is taken as a guide, the A77 II emerges as the winner of the contest (9 : 7 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the A77 II and the GX7 in practical situations. 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. This is where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Sony A77 II (⇒ rgt)||-||80/100 Silver||4.5/5||4/5||5/5||2014||1,199||latest||check|
|Panasonic GX7 (⇒ lft)||Rec||79/100 Silver||5/5||4.5/5||5/5||2013||999||discont.||check|
|Nikon D7200 (⇒ lft | rgt)||HiRec||84/100 Silver||4.5/5||4/5||4.5/5||2015||1,199||discont.||check|
|Olympus E-M10 (⇒ lft | rgt)||-||80/100 Gold||5/5||4.5/5||5/5||2014||699||discont.||check|
|Olympus E-P5 (⇒ lft | rgt)||HiRec||78/100 Silver||4.5/5||4.5/5||5/5||2013||999||discont.||check|
|Panasonic G85 (⇒ lft | rgt)||HiRec||84/100 Gold||5/5||4.5/5||4.5/5||2016||899||latest||check|
|Panasonic GX8 (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||4.5/5||2015||1,199||discont.||check|
|Panasonic G6 (⇒ lft | rgt)||HiRec||-||5/5||-||4.5/5||2013||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||Rec||78/100 Gold||5/5||4.5/5||4.5/5||2013||749||discont.||check|
|Pentax K-3 II (⇒ lft | rgt)||-||-||5/5||4.5/5||5/5||2015||1,099||latest||check|
|Pentax K-3 (⇒ lft | rgt)||-||83/100 Gold||5/5||4.5/5||5/5||2013||1,299||discont.||check|
|Sony A9 (⇒ lft | rgt)||..||89/100 Gold||5/5||5/5||5/5||2017||4,499||latest||check|
|Sony A6500 (⇒ lft | rgt)||HiRec||85/100 Silver||4.5/5||5/5||4.5/5||2016||1,399||latest||check|
|Sony RX10 II (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||4.5/5||4/5||2015||1,299||discont.||check|
|Sony A7 II (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||5/5||2014||1,999||discont.||check|
|Sony RX10 (⇒ lft | rgt)||Rec||80/100 Gold||4.5/5||4.5/5||4.5/5||2013||1,299||discont.||check|
|Sony A77 (⇒ lft | rgt)||91/100||81/100 Silver||-||4.5/5||5/5||2011||1,999||discont.||check|
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. A score, therefore, has to be seen in close connection to the price and market introduction time 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.
If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If you do not see the camera that you are looking for, please send me an email, and I will try to locate and add the respective data to the application.
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