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Panasonic GX800 vs Sony A77 II

The Panasonic Lumix DMC-GX800 (called Panasonic GX850 in some regions) and the Sony Alpha SLT-A77 II are two digital cameras that were officially introduced, respectively, in January 2017 and May 2014. The GX800 is a mirrorless interchangeable lens camera, while the A77 II is a DSLR. The cameras are based on a Four Thirds (GX800) and an APS-C (A77 II) sensor. The Panasonic has a resolution of 15.8 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.

Headline Specifications
Panasonic GX800
versus
Sony A77 II
Panasonic GX800   Sony A77 II
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Sony A mount lenses
15.8 MP – Four Thirds sensor 24 MP – APS-C sensor
4K/30p Video 1080/60p Video
ISO 200-25,600 ISO 100-25,600 (50 - 51,200)
No viewfinder, LCD framing Electronic viewfinder (2359k dots)
3.0" LCD – 1040k dots 3.0" LCD – 1229k dots
Tilting touchscreen Fully flexible screen (no touchscreen)
10 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
210 shots per battery charge480 shots per battery charge
107 x 65 x 33 mm, 269 g 143 x 104 x 81 mm, 647 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GX800 and the Sony Alpha SLT-A77 II? 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.

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Body comparison

The physical size and weight of the Panasonic GX800 and the Sony A77 II are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.

The GX800 can be obtained in three different colors (black, silver, red), while the A77 II is only available in black.

Size Panasonic GX800 vs Sony A77 II
Compare GX800 versus A77 II top
Comparison GX800 or A77 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 II is considerably larger (114 percent) than the Panasonic GX800. Moreover, the A77 II is substantially heavier (141 percent) than the GX800. It is noteworthy in this context that the A77 II is splash and dust-proof, while the GX800 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 GX800 gets 210 shots out of its Panasonic DMW-BLH7 battery, while the A77 II can take 480 images on a single charge of its Sony NP-FM500H power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Panasonic GX800 107 mm 65 mm 33 mm 269 g 210 n Jan 2017 US$ 549ebay.com
2.
 
Sony A77 II 143 mm 104 mm 81 mm 647 g 480 Y May 2014 US$ 1 199ebay.com
3.
 
Canon M10 108 mm 67 mm 35 mm 301 g 255 n Oct 2015 US$ 499ebay.com
4.
 
Canon M100 108 mm 67 mm 35 mm 302 g 295 n Aug 2017 US$ 499ebay.com
5.
 
Nikon D7100 136 mm 107 mm 76 mm 765 g 950 Y Feb 2013 US$ 1 199ebay.com
6.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 US$ 599ebay.com
7.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 US$ 599ebay.com
8.
 
Panasonic G7 125 mm 86 mm 77 mm 410 g 350 n May 2015 US$ 649ebay.com
9.
 
Panasonic GF5 108 mm 67 mm 37 mm 267 g 360 n Apr 2012 US$ 499ebay.com
10.
 
Panasonic GF6 111 mm 65 mm 38 mm 323 g 340 n Apr 2013 US$ 499ebay.com
11.
 
Panasonic GF7 107 mm 65 mm 33 mm 266 g 230 n Jan 2015 US$ 499ebay.com
12.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 US$ 749ebay.com
13.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 US$ 749ebay.com
14.
 
Sony A58 129 mm 95 mm 78 mm 492 g 690 n Feb 2013 US$ 599ebay.com
15.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 US$ 699ebay.com
16.
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 US$ 1 399ebay.com
17.
 
Sony A6600 120 mm 67 mm 69 mm 503 g 810 Y Aug 2019 US$ 1 399 amazon.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 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 GX800 was launched at a markedly lower price (by 54 percent) than the A77 II, which puts it into a different market segment. 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

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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GX800 features a Four Thirds sensor and the Sony A77 II an APS-C sensor. The sensor area in the A77 II is 63 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the GX800 has a native 4:3 aspect ratio, while the one in the A77 II offers a 3:2 aspect.

Panasonic GX800 and Sony A77 II sensor measures

With 24MP, the A77 II offers a higher resolution than the GX800 (15.8MP), but the A77 II nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 3.77μm for the GX800) due to its larger sensor. However, the GX800 is a much more recent model (by 2 years and 8 months) than the A77 II, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the GX800 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A77 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 II 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 Panasonic GX800 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.

The Panasonic Lumix DMC-GX800 has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Sony Alpha SLT-A77 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

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.

GX800 versus A77 II MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 II has a markedly higher DXO score than the GX800 (overall score 9 points higher), which will translate into better image quality. The advantage is based on 1.2 bits higher color depth, 0.1 EV in additional dynamic range, and 0.8 stops in additional 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.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Panasonic GX800 Four Thirds 15.8 4592 34484K/30p23.213.358673
2.
 
Sony A77 II APS-C 24.0 6000 40001080/60p24.413.4101382
3.
 
Canon M10 APS-C 17.9 5184 34561080/30p22.211.475365
4.
 
Canon M100 APS-C 24.0 6000 40001080/60p23.512.9127278
5.
 
Nikon D7100 APS-C 24.0 6000 40001080/60p24.213.7125683
6.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
7.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
8.
 
Panasonic G7 Four Thirds 15.8 4592 34484K/30p22.812.490471
9.
 
Panasonic GF5 Four Thirds 12.0 4000 30001080/60i20.510.057350
10.
 
Panasonic GF6 Four Thirds 15.8 4592 34481080/60i20.710.662254
11.
 
Panasonic GF7 Four Thirds 15.8 4592 34481080/60p22.712.387470
12.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
13.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
14.
 
Sony A58 APS-C 19.8 5456 36321080/60i23.312.575374
15.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
16.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
17.
 
Sony A6600 APS-C 24.0 6000 40004K/30p23.813.4149782
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the GX800 provides a higher video resolution than the A77 II. It can shoot video footage at 4K/30p, while the Sony is limited to 1080/60p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A77 II has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the GX800 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Panasonic GX800, the Sony A77 II, and comparable cameras.

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Core Features
  empty 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.
 
Panasonic GX800none n3.0 / 1040 tilting Y 1/500s 10.0/s Y n
2.
 
Sony A77 II2359 Y3.0 / 1229 full-flex n 1/8000s 12.0/s Y Y
3.
 
Canon M10none n3.0 / 1040 tilting Y 1/4000s 4.6/s Y n
4.
 
Canon M100none n3.0 / 1040 tilting Y 1/4000s 6.1/s Y n
5.
 
Nikon D7100optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
6.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
7.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
8.
 
Panasonic G72360 n3.0 / 1040 swivel Y 1/4000s 7.0/s Y n
9.
 
Panasonic GF5none n3.0 / 920 fixed Y 1/4000s 4.0/s Y n
10.
 
Panasonic GF6none n3.0 / 1040 tilting Y 1/4000s 4.2/s Y n
11.
 
Panasonic GF7none n3.0 / 1040 tilting Y 1/500s 5.8/s Y n
12.
 
Panasonic GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
13.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
14.
 
Sony A581440 n2.7 / 460 tilting n 1/4000s 5.0/s Y Y
15.
 
Sony A681440 Y2.7 / 460 tilting n 1/4000s 8.0/s Y Y
16.
 
Sony A772359 Y3.0 / 921 full-flex n 1/8000s 12.0/s Y Y
17.
 
Sony A66002359 n3.0 / 922 tilting Y 1/4000s 11.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The GX800 has a touchscreen, while the A77 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the GX800 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Panasonic GX800 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The GX800 writes its imaging data to SDXC cards, while the A77 II uses 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.

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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 Panasonic Lumix DMC-GX800 and Sony Alpha SLT-A77 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Panasonic GX800-stereo / mono--micro2.0Y--
2.
 
Sony A77 IIYstereo / monoY-mini2.0YY-
3.
 
Canon M10-stereo / mono--mini2.0YY-
4.
 
Canon M100-stereo / mono--micro2.0YYY
5.
 
Nikon D7100Ystereo / monoYYmini2.0---
6.
 
Panasonic G5Ystereo / mono--mini2.0---
7.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
8.
 
Panasonic G7Ystereo / monoY-micro2.0Y--
9.
 
Panasonic GF5-stereo / mono--mini2.0---
10.
 
Panasonic GF6-stereo / mono--mini2.0YY-
11.
 
Panasonic GF7-stereo / mono--micro2.0YY-
12.
 
Panasonic GM1-stereo / mono--micro2.0Y--
13.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
14.
 
Sony A58Ystereo / monoY-mini2.0---
15.
 
Sony A68Ystereo / monoY-micro2.0---
16.
 
Sony A77Ystereo / monoY-mini2.0---
17.
 
Sony A6600Ystereo / monoYYYES2.0YYY

It is notable that the A77 II has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The GX800 does not feature such a mic input.

Studio photographers will appreciate that the Sony A77 II (unlike the GX800) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the GX800 and the A77 II have been discontinued, but can regularly be found used on ebay. Neither of the two has a direct successor, so they represent the end of the respective camera lines from Panasonic and Sony. Further information on the features and operation of the GX800 and A77 II can be found, respectively, in the Panasonic GX800 Manual (free pdf) or the online Sony A77 II Manual.

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Review summary

So how do things add up? Is the Panasonic GX800 better than the Sony A77 II or vice versa? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GX800:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (107x65mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 378g or 58 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
  • More modern: Reflects 2 years and 8 months of technical progress since the A77 II launch.

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Reasons to prefer the Sony Alpha SLT-A77 II:

  • More detail: Has more megapixels (24 vs 15.8MP), which boosts linear resolution by 26%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores markedly higher (9 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.2 bits more color depth).
  • Better low-light sensitivity: Can shoot in dim conditions (0.8 stops ISO advantage).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Easier framing: Has an electronic viewfinder for image composition and settings control.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/500s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (480 versus 210) out of a single battery charge.
  • 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.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been around for much longer (launched in May 2014).

If the count of individual advantages (bullet points above) is taken as a guide, the A77 II is the clear winner of the contest (19 : 10 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

GX800 10:19 A77 II

How about other alternatives? Do the specifications of the Panasonic GX800 and the Sony A77 II 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 says little about, for example, the shooting experience and imaging performance of the GX800 and the A77 II 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.

Expert reviews

This is why hands-on reviews by experts are important. 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Panasonic GX800..+..76/1004.5/54.5/5 Jan 2017 US$ 549ebay.com
2.
 
Sony A77 II4/5....80/1004.5/55/5 May 2014 US$ 1 199ebay.com
3.
 
Canon M10..........4/5 Oct 2015 US$ 499ebay.com
4.
 
Canon M1003/5+....4/53.5/5 Aug 2017 US$ 499ebay.com
5.
 
Nikon D71005/5+ +..85/1004.5/54.5/5 Feb 2013 US$ 1 199ebay.com
6.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 US$ 599ebay.com
7.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 US$ 599ebay.com
8.
 
Panasonic G74/5+ +3.5/580/1005/54.5/5 May 2015 US$ 649ebay.com
9.
 
Panasonic GF53/5......4.5/54.5/5 Apr 2012 US$ 499ebay.com
10.
 
Panasonic GF6..+ +....4.5/54.5/5 Apr 2013 US$ 499ebay.com
11.
 
Panasonic GF74/5+....4.5/54.5/5 Jan 2015 US$ 499ebay.com
12.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 US$ 749ebay.com
13.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 US$ 749ebay.com
14.
 
Sony A583/5......4.5/54.5/5 Feb 2013 US$ 599ebay.com
15.
 
Sony A683/5......4/54/5 Nov 2015 US$ 699ebay.com
16.
 
Sony A775/591/100..81/100..5/5 Aug 2011 US$ 1 399ebay.com
17.
 
Sony A66004/5+4/583/1004.5/54/5 Aug 2019 US$ 1 399 amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price 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.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic GX800 vs Sony A77 II

    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 Specifications
    Camera Model Panasonic GX800 Sony A77 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Sony A mount lenses
    Launch Date January 2017 May 2014
    Launch Price USD 549 USD 1,199
    Sensor Specs Panasonic GX800 Sony A77 II
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor APS-C Sensor
    Sensor Size 17.3 x 13.0 mm 23.5 x 15.6 mm
    Sensor Area 224.9 mm2 366.6 mm2
    Sensor Diagonal 21.6 mm 28.2 mm
    Crop Factor 2.0x 1.5x
    Sensor Resolution 15.8 Megapixels 24 Megapixels
    Image Resolution 4592 x 3448 pixels 6000 x 4000 pixels
    Pixel Pitch 3.77 μm 3.91 μm
    Pixel Density 7.04 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 1080/60p Video
    ISO Setting 200 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost 100 - 25,600 ISO 50 - 51,200 ISO
    Image Processor Venus BIONZ X
    DXO Sensor Quality (score) 73 82
    DXO Color Depth (bits) 23.2 24.4
    DXO Dynamic Range (EV) 13.3 13.4
    DXO Low Light (ISO) 586 1013
    Screen Specs Panasonic GX800 Sony A77 II
    Viewfinder Type no viewfinder Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.73x
    Viewfinder Resolution 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 1040k dots 1229k dots
    LCD Attachment Tilting screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GX800 Sony A77 II
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/500s 1/8000s
    Continuous Shooting 10 shutter flaps/s 12 shutter flaps/s
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GX800 Sony A77 II
    External Flash no Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Panasonic GX800 Sony A77 II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Panasonic DMW-BLH7 Sony NP-FM500H
    Battery Life (CIPA)210 shots per charge480 shots per charge
    Body Dimensions 107 x 65 x 33 mm
    (4.2 x 2.6 x 1.3 in)
    143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 269 g (9.5 oz) 647 g (22.8 oz)
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