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Panasonic GX9 vs Sony A77 II

The Panasonic Lumix DC-GX9 and the Sony Alpha SLT-A77 II are two enthusiast cameras that were announced, respectively, in February 2018 and May 2014. The GX9 is a mirrorless interchangeable lens camera, while the A77 II is a DSLR. The cameras are based on a Four Thirds (GX9) and an APS-C (A77 II) sensor. The Panasonic has a resolution of 20.2 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 GX9   Sony A77 II
Panasonic GX9 Sony A77 II
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Sony A mount lenses
20.2 MP, Four Thirds Sensor 24 MP, APS-C Sensor
4K/30p Video 1080/60p Video
ISO 200-25600 ISO 100-25600 (50-51200)
Electronic viewfinder (2760k dots) Electronic viewfinder (2359k dots)
3.0" LCD, 1240k dots 3.0" LCD, 1229k dots
Tilting touchscreen Fully flexible screen (no touchscreen)
9 shutter flaps per second 12 shutter flaps per second
In-body stabilizationIn-body stabilization
Not weather sealedWeathersealed body
260 shots per battery charge480 shots per battery charge
124 x 72 x 47 mm, 407 g 143 x 104 x 81 mm, 647 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DC-GX9 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.

Body comparison: Panasonic GX9 vs Sony A77 II

The physical size and weight of the Panasonic GX9 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 successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The GX9 can be obtained in two different colors (black, silver), while the A77 II is only available in black.

Size Panasonic GX9 vs Sony A77 II
Compare GX9 versus A77 II top
Comparison GX9 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 (67 percent) than the Panasonic GX9. Moreover, the A77 II is substantially heavier (59 percent) than the GX9. It is noteworthy in this context that the A77 II is splash and dust-proof, while the GX9 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 GX9 gets 260 shots out of its DMW-BLG10 battery, while the A77 II can take 480 images on a single charge of its NP-FM500H power pack.

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 camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Panasonic GX9» 4.9 in 2.8 in 1.9 in 14.4 oz 260 n Feb 2018 849 i i Panasonic GX9
 
Sony A77 II« 5.6 in 4.1 in 3.2 in 22.8 oz 480 Y May 2014 1,199 i i Sony A77 II
 
Nikon D7100« » 5.4 in 4.2 in 3.0 in 27.0 oz 950 Y Feb 2013 1,199- i Nikon D7100
 
Olympus E-M10 III« » 4.8 in 3.3 in 2.0 in 14.5 oz 330 n Aug 2017 649 i i Olympus E-M10 III
 
Olympus PEN-F« » 4.9 in 2.8 in 1.5 in 15.1 oz 330 n Jan 2016 1,199 i i Olympus PEN-F
 
Olympus E-M10 II« » 4.7 in 3.3 in 1.9 in 13.8 oz 320 n Aug 2015 649- i Olympus E-M10 II
 
Panasonic G95« » 5.1 in 3.7 in 3.0 in 18.9 oz 290 Y Apr 2019 999 i i Panasonic G95
 
Panasonic LX100 II« » 4.5 in 2.6 in 2.6 in 13.8 oz 300 n Aug 2018 999 i i Panasonic LX100 II
 
Panasonic ZS200« » 4.4 in 2.6 in 1.8 in 12.0 oz 370 n Feb 2018 799 i i Panasonic ZS200
 
Panasonic G9« » 5.4 in 3.8 in 3.6 in 23.2 oz 400 Y Nov 2017 1,699 i i Panasonic G9
 
Panasonic GX85« » 4.8 in 2.8 in 1.7 in 15.0 oz 290 n Apr 2016 799 i i Panasonic GX85
 
Panasonic GX8« » 5.2 in 3.1 in 2.5 in 17.2 oz 330 Y Jul 2015 1,199- i Panasonic GX8
 
Panasonic GX7« » 4.8 in 2.8 in 2.2 in 14.2 oz 350 n Aug 2013 999- i Panasonic GX7
 
Pentax K-3« » 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299- i Pentax K-3
 
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399 i i Sony A6500
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony A77« » 5.6 in 4.1 in 3.2 in 25.8 oz 470 Y Aug 2011 1,399- i Sony A77
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. 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 GX9 was launched at a markedly lower price (by 29 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.

 

Sensor comparison: Panasonic GX9 vs Sony A77 II

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. 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 Panasonic GX9 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 GX9 has a native 4:3 aspect ratio, while the one in the A77 II offers a 3:2 aspect.

Panasonic GX9 and Sony A77 II sensor measures

With 24MP, the A77 II offers a higher resolution than the GX9 (20.2MP), but the A77 II nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 3.34μm for the GX9) due to its larger sensor. However, the GX9 is a much more recent model (by 3 years and 9 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 GX9 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 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Panasonic GX9 are 25.9 x 19.4 inch or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inch or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inch or 43.9 x 32.9 cm for excellent quality prints.

The Panasonic Lumix DC-GX9 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.

GX9 versus A77 II MP

Consistent information on actual sensor performance is available from DXO Mark for many 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Panasonic GX9» Four Thirds 20.2 5184 38884K/30p----Panasonic GX9
 
Sony A77 II« APS-C 24.0 6000 40001080/60p----Sony A77 II
 
Nikon D7100« » APS-C 24.0 6000 40001080/60p24.213.7125683Nikon D7100
 
Olympus E-M10 III« » Four Thirds 15.9 4608 34564K/30p----Olympus E-M10 III
 
Olympus PEN-F« » Four Thirds 20.2 5184 38881080/60p23.112.489474Olympus PEN-F
 
Olympus E-M10 II« » Four Thirds 15.9 4608 34561080/60p23.112.584273Olympus E-M10 II
 
Panasonic G95« » Four Thirds 20.2 5184 38884K/30p----Panasonic G95
 
Panasonic LX100 II« » Four Thirds 16.8 4736 35524K/30p----Panasonic LX100 II
 
Panasonic ZS200« » 1-inch 20.0 5472 36484K/30p----Panasonic ZS200
 
Panasonic G9« » Four Thirds 20.2 5184 38884K/60p----Panasonic G9
 
Panasonic GX85« » Four Thirds 15.8 4592 34484K/30p22.912.666271Panasonic GX85
 
Panasonic GX8« » Four Thirds 20.2 5184 38884K/30p23.512.680675Panasonic GX8
 
Panasonic GX7« » Four Thirds 15.8 4592 34481080/60p22.612.271870Panasonic GX7
 
Pentax K-3« » APS-C 24.1 6016 40001080/60i23.713.4121680Pentax K-3
 
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585Sony A6500
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony A77« » APS-C 24.0 6000 40001080/60p24.013.280178Sony A77

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, but the GX9 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.

 

Feature comparison: Panasonic GX9 vs Sony A77 II

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GX9 offers a higher resolution than the one in the A77 II (2760k vs 2359k dots). The following table reports on some other key feature differences and similarities of the Panasonic GX9, the Sony A77 II, and comparable cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Panasonic GX9»2760 n 3.0 1240 tilting Y 1/4000s 9.0 Y Y Panasonic GX9
 
Sony A77 II«2359 Y 3.0 1229 full-flex n 1/8000s 12.0 Y Y Sony A77 II
 
Nikon D7100« »optical Y 3.2 1229 fixed n 1/8000s 6.0 Y n Nikon D7100
 
Olympus E-M10 III« »2360 n 3.0 1040 tilting Y 1/4000s 8.6 Y Y Olympus E-M10 III
 
Olympus PEN-F« »2360 n 3.0 1037 swivel Y 1/8000s 10.0 n Y Olympus PEN-F
 
Olympus E-M10 II« »2360 n 3.0 1040 tilting Y 1/4000s 8.0 Y Y Olympus E-M10 II
 
Panasonic G95« »2360 n 3.0 1240 swivel Y 1/4000s 9.0 Y Y Panasonic G95
 
Panasonic LX100 II« »2764 n 3.0 1240 fixed Y 1/4000s 11.0 n Y Panasonic LX100 II
 
Panasonic ZS200« »2330 n 3.0 1240 fixed Y 1/2000s 10.0 Y Y Panasonic ZS200
 
Panasonic G9« »3680 Y 3.0 1040 swivel Y 1/8000s 20.0 n Y Panasonic G9
 
Panasonic GX85« »2765 n 3.0 1040 tilting Y 1/4000s 8.0 Y Y Panasonic GX85
 
Panasonic GX8« »2360 n 3.0 1040 swivel Y 1/8000s 10.0 n Y Panasonic GX8
 
Panasonic GX7« »2760 n 3.0 1040 tilting Y 1/8000s 5.0 Y Y Panasonic GX7
 
Pentax K-3« »optical Y 3.2 1037 fixed n 1/8000s 8.3 Y Y Pentax K-3
 
Sony A6500« »2359 n 3.0 922 tilting Y 1/4000s 11.0 Y Y Sony A6500
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony A77« »2359 Y 3.0 921 full-flex n 1/8000s 12.0 Y Y Sony A77

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The GX9 has a touchscreen, while the A77 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The A77 II 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 GX9 does not have a selfie-screen.

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 GX9 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 GX9 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 GX9 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.

 

Connectivity comparison: Panasonic GX9 vs Sony A77 II

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 DC-GX9 and Sony Alpha SLT-A77 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Panasonic GX9»Ystereomono--micro2.0Y-YPanasonic GX9
 
Sony A77 II«YstereomonoY-mini2.0YY-Sony A77 II
 
Nikon D7100« »YstereomonoYYmini2.0---Nikon D7100
 
Olympus E-M10 III« »Ystereomono--micro2.0Y--Olympus E-M10 III
 
Olympus PEN-F« »Ystereomono--micro2.0Y--Olympus PEN-F
 
Olympus E-M10 II« »Ystereomono--micro2.0Y--Olympus E-M10 II
 
Panasonic G95« »YstereomonoYYmicro2.0Y-YPanasonic G95
 
Panasonic LX100 II« »Ystereomono--micro2.0Y-YPanasonic LX100 II
 
Panasonic ZS200« »-stereomono--micro2.0Y--Panasonic ZS200
 
Panasonic G9« »YstereomonoYYfull3.0Y-YPanasonic G9
 
Panasonic GX85« »Ystereomono--micro2.0Y--Panasonic GX85
 
Panasonic GX8« »YstereomonoY-micro2.0YY-Panasonic GX8
 
Panasonic GX7« »Ystereomono--mini2.0YY-Panasonic GX7
 
Pentax K-3« »YmonomonoYYmini3.0---Pentax K-3
 
Sony A6500« »YstereomonoY-micro2.0YY-Sony A6500
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony A77« »YstereomonoY-mini2.0---Sony A77

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 GX9 does not feature such a mic input.

Studio photographers will appreciate that the Sony A77 II (unlike the GX9) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the GX9 and the A77 II are recent models that are part of the current product line-up. The A77 II replaced the earlier Sony A77, while the GX9 followed on from the Panasonic GX8. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Sony websites.


Review summary: Panasonic GX9 vs Sony A77 II

So what conclusions can be drawn? Is there a clear favorite between the Panasonic GX9 and the Sony A77 II? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Panasonic Lumix DC-GX9:

  • 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).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 2359k dots).
  • 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 (124x72mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 240g or 37 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More affordable: Was introduced into a lower priced category (29 percent cheaper at launch).
  • More modern: Reflects 3 years and 9 months of technical progress since the A77 II launch.

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Arguments in favor of the Sony Alpha SLT-A77 II:

  • More detail: Has more megapixels (24 vs 20.2MP), which boosts linear resolution by 11%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.70x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More flexible LCD: Has 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 shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 9 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (480 versus 260) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • 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 emerges as the winner of the match-up (14 : 12 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 before making a decision on a new camera. 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.

GX9 12:14 A77 II

How about other alternatives? Do the specifications of the Panasonic GX9 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the GX9 or the A77 II. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews: Panasonic GX9 vs Sony A77 II

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Panasonic GX9»+84/1004.5/54.5/54.5/5 Feb 2018 849 i i Panasonic GX9
 
Sony A77 II«-80/1004.5/54/55/5 May 2014 1,199 i i Sony A77 II
 
Nikon D7100« »+ +85/1004.5/55/54.5/5 Feb 2013 1,199- i Nikon D7100
 
Olympus E-M10 III« »+80/1004.5/54/54.5/5 Aug 2017 649 i i Olympus E-M10 III
 
Olympus PEN-F« »-82/1004.5/54.5/55/5 Jan 2016 1,199 i i Olympus PEN-F
 
Olympus E-M10 II« »+ +80/1005/55/55/5 Aug 2015 649- i Olympus E-M10 II
 
Panasonic G95« »+-4.5/5-4.5/5 Apr 2019 999 i i Panasonic G95
 
Panasonic LX100 II« »+82/1004.5/5-4.5/5 Aug 2018 999 i i Panasonic LX100 II
 
Panasonic ZS200« »+ +81/1004.5/5-4.5/5 Feb 2018 799 i i Panasonic ZS200
 
Panasonic G9« »+ +85/1005/55/55/5 Nov 2017 1,699 i i Panasonic G9
 
Panasonic GX85« »+ +82/1005/54.5/55/5 Apr 2016 799 i i Panasonic GX85
 
Panasonic GX8« »+82/1004.5/55/54.5/5 Jul 2015 1,199- i Panasonic GX8
 
Panasonic GX7« »+79/1005/54.5/55/5 Aug 2013 999- i Panasonic GX7
 
Pentax K-3« »-83/1005/54.5/55/5 Oct 2013 1,299- i Pentax K-3
 
Sony A6500« »+ +85/1004.5/55/54.5/5 Oct 2016 1,399 i i Sony A6500
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony A77« »91/10081/100-4.5/55/5 Aug 2011 1,399- i Sony A77
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 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.

Panasonic GX9:
Check Amazon price
Sony A77 II:
Check Amazon price

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of 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.

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    Specifications: Panasonic GX9 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 GX9 Sony A77 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Sony A mount lenses
    Launch Date February 2018 May 2014
    Launch Price USD 849 USD 1199
    Sensor Specs Panasonic GX9 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 20.2 Megapixels 24 Megapixels
    Image Resolution 5184 x 3888 pixels 6000 x 4000 pixels
    Pixel Pitch 3.34 μm 3.91 μm
    Pixel Density 8.96 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 1080/60p Video
    ISO Setting 200-25600 ISO 100-25600 ISO
    ISO Boost 100-25600 ISO 50-51200 ISO
    Image Processor Venus BIONZ X
    Screen Specs Panasonic GX9 Sony A77 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x 0.73x
    Viewfinder Resolution 2760k dots 2359k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 1240k dots 1229k dots
    LCD Attachment Tilting screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GX9 Sony A77 II
    Autofocus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000/s 1/8000/s
    Continuous Shooting 9 shutter flaps/s 12 shutter flaps/s
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GX9 Sony A77 II
    External Flash 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
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Panasonic GX9 Sony A77 II
    Environmental SealingNot weather sealedWeathersealed body
    Battery Type DMW-BLG10 power pack NP-FM500H power pack
    Battery Life (CIPA)260 shots per charge480 shots per charge
    Body Dimensions 124 x 72 x 47 mm
    (4.9 x 2.8 x 1.9 in)
    143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 407 g (14.4 oz) 647 g (22.8 oz)

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