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Panasonic G9 II vs Sony A77 II

The Panasonic Lumix DC-G9 II and the Sony Alpha SLT-A77 II are two enthusiast cameras that were revealed to the public, respectively, in September 2023 and May 2014. The G9 II is a mirrorless interchangeable lens camera, while the A77 II is a DSLR. The cameras are based on a Four Thirds (G9 II) and an APS-C (A77 II) sensor. The Panasonic has a resolution of 25 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 G9 II
versus
Sony A77 II
Panasonic G9 II   Sony A77 II
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Sony A mount lenses
25 MP – Four Thirds sensor 24 MP – APS-C sensor
5.7K/60p Video 1080/60p Video
ISO 100-25,600 ISO 100-25,600 (50 - 51,200)
Electronic viewfinder (3680k dots) Electronic viewfinder (2359k dots)
3.0" LCD – 1840k dots 3.0" LCD – 1229k dots
Swivel touchscreen Fully flexible screen (no touchscreen)
10 shutter flaps per second 12 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
390 shots per battery charge480 shots per battery charge
134 x 102 x 90 mm, 658 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 DC-G9 II 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 G9 II 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 views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

Size Panasonic G9 II vs Sony A77 II
Compare G9 II versus A77 II top
Comparison G9 II 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 notably larger (9 percent) than the Panasonic G9 II. However, the A77 II is slightly lighter (2 percent) than the G9 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 G9 II gets 390 shots out of its Panasonic DMW-BLK22 battery, while the A77 II can take 480 images on a single charge of its Sony NP-FM500H power pack. The power pack in the G9 II can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.

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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 G9 II 134 mm 102 mm 90 mm 658 g 390 Y Sep 2023 US$ 1 899 amazon.com
2.
 
Sony A77 II 143 mm 104 mm 81 mm 647 g 480 Y May 2014 US$ 1 199ebay.com
3.
 
Nikon D7100 136 mm 107 mm 76 mm 765 g 950 Y Feb 2013 US$ 1 199ebay.com
4.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 US$ 1 999ebay.com
5.
 
Olympus E-M1 III 134 mm 91 mm 69 mm 580 g 420 Y Feb 2020 US$ 1 799ebay.com
6.
 
OM System OM-1 135 mm 92 mm 73 mm 599 g 520 Y Feb 2022 US$ 2 199ebay.com
7.
 
Panasonic G9 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 US$ 1 699ebay.com
8.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 US$ 1 999ebay.com
9.
 
Panasonic GH5 II 139 mm 98 mm 87 mm 727 g 400 Y May 2021 US$ 1 699 amazon.com
10.
 
Panasonic GH6 138 mm 100 mm 100 mm 823 g 360 Y Feb 2022 US$ 2 199 amazon.com
11.
 
Panasonic GH7 138 mm 100 mm 100 mm 805 g 380 Y Jun 2024 US$ 2 199 amazon.com
12.
 
Panasonic S5 133 mm 98 mm 82 mm 714 g 440 Y Sep 2020 US$ 1 999 amazon.com
13.
 
Panasonic S5 II 134 mm 102 mm 90 mm 740 g 370 Y Jan 2023 US$ 1 999 amazon.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 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 A77 II was launched at a markedly lower price (by 37 percent) than the G9 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

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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic G9 II 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 G9 II has a native 4:3 aspect ratio, while the one in the A77 II offers a 3:2 aspect.

Panasonic G9 II and Sony A77 II sensor measures

Despite having a smaller sensor, the Panasonic G9 II offers a higher resolution of 25 megapixels, compared with 24 MP of the Sony A77 II. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.00μm versus 3.91μm for the A77 II). However, it should be noted that the G9 II is much more recent (by 9 years and 4 months) than the A77 II, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the G9 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The G9 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the A77 II, the G9 II has the capacity to capture high quality composite images (100MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Panasonic Lumix DC-G9 II has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-25600. 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.

G9 II 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 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 G9 II Four Thirds 25.0 5776 43365.7K/60p23.413.5171078
2.
 
Sony A77 II APS-C 24.0 6000 40001080/60p24.413.4101382
3.
 
Nikon D7100 APS-C 24.0 6000 40001080/60p24.213.7125683
4.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
5.
 
Olympus E-M1 III Four Thirds 20.2 5184 38884K/30p23.313.1135676
6.
 
OM System OM-1 Four Thirds 20.2 5184 38884K/60p23.413.4155377
7.
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p23.112.8113874
8.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
9.
 
Panasonic GH5 II Four Thirds 20.2 5184 38884K/60p23.713.1113679
10.
 
Panasonic GH6 Four Thirds 25.0 5776 43365.7K/60p23.413.4155577
11.
 
Panasonic GH7 Four Thirds 25.0 5776 43365.7K/60p23.413.6178478
12.
 
Panasonic S5 Full Frame 24.0 6000 40004K/60p25.114.5269794
13.
 
Panasonic S5 II Full Frame 24.0 6000 40006K/30p25.414.6315896
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 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, but the G9 II provides a higher video resolution than the A77 II. It can shoot video footage at 5.7K/60p, while the Sony is limited to 1080/60p.

Feature comparison

Beyond 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 G9 II offers a substantially higher resolution than the one in the A77 II (3680k vs 2359k dots). The adjacent table lists some of the other core features of the Panasonic G9 II and Sony A77 II along with similar information for a selection of comparators.

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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 G9 II3680 n3.0 / 1840 swivel Y 1/8000s 10.0/s n Y
2.
 
Sony A77 II2359 Y3.0 / 1229 full-flex n 1/8000s 12.0/s Y Y
3.
 
Nikon D7100optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
4.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
5.
 
Olympus E-M1 III2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
6.
 
OM System OM-15760 n3.0 / 1640 swivel Y 1/8000s 10.0/s n Y
7.
 
Panasonic G93680 Y3.0 / 1040 swivel Y 1/8000s 20.0/s n Y
8.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
9.
 
Panasonic GH5 II3680 n3.0 / 1840 swivel Y 1/8000s 12.0/s n Y
10.
 
Panasonic GH63680 n3.0 / 1840 full-flex Y 1/8000s 14.0/s n Y
11.
 
Panasonic GH73680 n3.0 / 1840 full-flex Y 1/8000s 14.0/s n Y
12.
 
Panasonic S52360 n3.0 / 1840 swivel Y 1/8000s 7.0/s n Y
13.
 
Panasonic S5 II3680 n3.0 / 1840 swivel Y 1/8000s 9.0/s n Y
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 G9 II 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 G9 II 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 G9 II 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 G9 II writes its imaging data to SDXC cards, while the A77 II uses SDXC or Memory Stick PRO Duo cards. The G9 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the A77 II only has one slot. The G9 II supports UHS-II cards (on both slots), while the A77 II can use UHS-I cards.

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 DC-G9 II 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 G9 IIYstereo / monoYYfull3.2Y-Y
2.
 
Sony A77 IIYstereo / monoY-mini2.0YY-
3.
 
Nikon D7100Ystereo / monoYYmini2.0---
4.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
5.
 
Olympus E-M1 IIIYstereo / monoYYmicro3.1Y-Y
6.
 
OM System OM-1Ystereo / monoYYmicro3.0Y-Y
7.
 
Panasonic G9Ystereo / monoYYfull3.0Y-Y
8.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
9.
 
Panasonic GH5 IIYstereo / monoYYfull3.2Y-Y
10.
 
Panasonic GH6Ystereo / monoYYfull3.2Y-Y
11.
 
Panasonic GH7Ystereo / monoYYfull3.2Y-Y
12.
 
Panasonic S5Ystereo / monoYYmicro3.2Y-Y
13.
 
Panasonic S5 IIYstereo / monoYYfull3.2Y-Y
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 G9 II has a headphone jack, which is not present on the A77 II 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 II (unlike the G9 II) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The G9 II is a recent model that features in the current product line-up of Panasonic. In contrast, the A77 II has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the A77 II from Sony. Further information on the features and operation of the G9 II and A77 II can be found, respectively, in the Panasonic G9 II Manual (free pdf) or the online Sony A77 II Manual.

Review summary

So what conclusions can be drawn? Is the Panasonic G9 II better than the Sony A77 II or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Panasonic Lumix DC-G9 II:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better video: Provides higher definition movie capture (5.7K/60p vs 1080/60p).
  • 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 viewfinder: Has higher resolution electronic viewfinder (3680k vs 2359k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.8x vs 0.73x).
  • More detailed LCD: Has a higher resolution rear screen (1840k vs 1229k 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.
  • 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.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 9 years and 4 months of technical progress since the A77 II launch.

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

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (480 versus 390) out of a single battery charge.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • 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 affordable: Was introduced into a lower priced category (37 percent cheaper at launch).
  • 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 G9 II is the clear winner of the match-up (19 : 9 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.

G9 II 19:09 A77 II

How about other alternatives? Do the specifications of the Panasonic G9 II 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 incomplete and does no justice, for example, to the way the G9 II or the A77 II perform in practice. 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

This is why expert reviews 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 G9 II5/5..4.5/587/100..4.5/5 Sep 2023 US$ 1 899 amazon.com
2.
 
Sony A77 II4/5....80/1004.5/55/5 May 2014 US$ 1 199ebay.com
3.
 
Nikon D71005/5+ +..85/1004.5/54.5/5 Feb 2013 US$ 1 199ebay.com
4.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 US$ 1 999ebay.com
5.
 
Olympus E-M1 III5/5..5/583/1004.5/54/5 Feb 2020 US$ 1 799ebay.com
6.
 
OM System OM-15/5....87/1005/54.5/5 Feb 2022 US$ 2 199ebay.com
7.
 
Panasonic G9..+ +5/585/1005/55/5 Nov 2017 US$ 1 699ebay.com
8.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 US$ 1 999ebay.com
9.
 
Panasonic GH5 II4.5/5..4.5/585/1004.5/55/5 May 2021 US$ 1 699 amazon.com
10.
 
Panasonic GH65/5+ +5/587/1005/55/5 Feb 2022 US$ 2 199 amazon.com
11.
 
Panasonic GH7............ Jun 2024 US$ 2 199 amazon.com
12.
 
Panasonic S54.5/5+ +4.5/588/1004.5/54.5/5 Sep 2020 US$ 1 999 amazon.com
13.
 
Panasonic S5 II4.5/5+ +5/590/1004.5/55/5 Jan 2023 US$ 1 999 amazon.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. 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic G9 II 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 G9 II Sony A77 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Sony A mount lenses
    Launch Date September 2023 May 2014
    Launch Price USD 1,899 USD 1,199
    Sensor Specs Panasonic G9 II 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 25 Megapixels 24 Megapixels
    Image Resolution 5776 x 4336 pixels 6000 x 4000 pixels
    Pixel Pitch 3.00 μm 3.91 μm
    Pixel Density 11.14 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 5.7K/60p Video 1080/60p Video
    ISO Setting 100 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost 50 - 25,600 ISO 50 - 51,200 ISO
    Image Processor Venus BIONZ X
    DXO Sensor Quality (score) .. 82
    DXO Color Depth (bits) .. 24.4
    DXO Dynamic Range (EV) .. 13.4
    DXO Low Light (ISO) .. 1013
    Screen Specs Panasonic G9 II Sony A77 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.8x 0.73x
    Viewfinder Resolution 3680k 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 1840k dots 1229k dots
    LCD Attachment Swivel screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic G9 II Sony A77 II
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 10 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy200 000 actuations150 000 actuations
    Electronic Shutterup to 1/32000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support Dual UHS-II UHS-I
    Connectivity Specs Panasonic G9 II Sony A77 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 3.2 USB 2.0
    HDMI Port full HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone 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 G9 II Sony A77 II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Panasonic DMW-BLK22 Sony NP-FM500H
    Battery Life (CIPA)390 shots per charge480 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 134 x 102 x 90 mm
    (5.3 x 4.0 x 3.5 in)
    143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 658 g (23.2 oz) 647 g (22.8 oz)
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