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Sony A9 versus Panasonic GH5

The Sony Alpha A9 and the Panasonic Lumix DC-GH5 are two digital cameras that were officially introduced, respectively, in April 2017 and January 2017. Both the A9 and the GH5 are mirrorless interchangeable lens cameras that are based on a full frame (A9) and a Four Thirds (GH5) sensor. The Sony has a resolution of 24 megapixel, whereas the Panasonic provides 20.2 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Sony A9 vs Panasonic GH5

The side-by-side display below illustrates the physical size and weight of the Sony A9 and the Panasonic GH5. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter. You can also use the toggle button 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 A9 – represents the basis or 100 percent across all the size and weight measures).

Compare Sony A9 vs Panasonic GH5
Compare A9 versus GH5 top
Compare A9 and GH5 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GH5 is notably larger (12 percent) than the Sony A9. Moreover, the GH5 is markedly heavier (8 percent) than the A9. 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can find an overview of optics for the two cameras in the Sony FE Lens Catalog (A9) and the Micro Four Thirds Lens Catalog (GH5). Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the A9 gets 650 shots out of its NP-FZ100 battery, while the GH5 can take 410 images on a single charge of its DMW-BLF19 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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
Sony A9» 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i Sony A9
Panasonic GH5« 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 i i Panasonic GH5
Nikon D500« » 5.8 in 4.5 in 3.2 in 30.3 oz 1240 Y Jan 2016 1,999 i i Nikon D500
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 i i Olympus E-M1 II
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 G85« » 5.0 in 3.5 in 2.9 in 17.8 oz 330 Y Sep 2016 899 i i Panasonic G85
Panasonic GH4« » 5.2 in 3.7 in 3.3 in 19.8 oz 500 Y Feb 2014 1,499- i Panasonic GH4
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i Sony A7 III
Sony A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i Sony A7R III
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 A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i Sony A7R II
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i Sony A7S II
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 A99« » 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799- i Sony A99
Sony A77« » 5.6 in 4.1 in 3.2 in 25.8 oz 470 Y Aug 2011 1,999- i Sony A77

Any camera purchase will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The GH5 was launched at a markedly lower price (by 56 percent) than the A9, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Sony A9 vs Panasonic GH5

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony A9 features a full frame sensor and the Panasonic GH5 a Four Thirds sensor. The sensor area in the GH5 is 73 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the A9 has a native 3:2 aspect ratio, while the one in the GH5 offers a 4:3 aspect.

Sony A9 and Panasonic GH5 sensor measures

With 24MP, the A9 offers a higher resolution than the GH5 (20.2MP), but the A9 nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.34μm for the GH5) due to its larger sensor. Moreover, the A9 is a somewhat more recent model (by 3 months) than the GH5, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the GH5 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The A9 has on-sensor phase detect pixels, which results in relatively fast and reliable autofocus acquisition during video recording.

A9 versus GH5 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under review, the A9 provides substantially higher image quality than the GH5, with an overall score that is 15 points higher. This advantage is based on 1 bits higher color depth, 0.3 EV in additional dynamic range, and 2.1 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Sony A9» Full Frame 24.0 6000 40004K/30p24.913.3351792Sony A9
Panasonic GH5« Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
Nikon D500« » APS-C 20.7 5568 37124K/30p24.014.0132483Nikon D500
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
Panasonic G9« » Four Thirds 20.2 5184 38884K/60p----Panasonic G9
Panasonic G85« » Four Thirds 15.8 4592 34484K/30p22.812.565671Panasonic G85
Panasonic GH4« » Four Thirds 15.9 4608 34564K/30p23.212.879174Panasonic GH4
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585Sony A6500
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385Sony A7S II
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
Sony A99« » Full Frame 24.0 6000 40001080/60p25.014.0155589Sony A99
Sony A77« » APS-C 24.0 6000 40001080/60p24.013.280178Sony A77

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the GH5 provides a faster frame rate than the A9. It can shoot movie footage at 4K/60p, while the Sony is limited to 4K/30p.

 

Feature comparison: Sony A9 vs Panasonic GH5

Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the A9 offers a slightly higher resolution than the one in the GH5 (3686k vs 3680k dots). The adjacent table lists some of the other core features of the Sony A9 and Panasonic GH5 along with similar information for a selection of comparators. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

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)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Sony A9»3686 n 3.0 1440 tilting Y 8000 20.0 n Y Sony A9
Panasonic GH5«3680 n 3.2 1620 swivel Y 8000 12.0 n Y Panasonic GH5
Nikon D500« »optical Y 3.2 2359 tilting Y 8000 10.0 n n Nikon D500
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 8000 18.0 n Y Olympus E-M1 II
Panasonic G9« »3680 Y 3.0 1040 swivel Y 8000 20.0 n Y Panasonic G9
Panasonic G85« »2360 n 3.0 1040 swivel Y 4000 9.0 Y Y Panasonic G85
Panasonic GH4« »2359 n 3.0 1036 swivel Y 8000 12.0 Y n Panasonic GH4
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y Sony A7 III
Sony A7R III« »3686 n 3.0 1440 tilting Y 8000 10.0 n Y Sony A7R III
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y Sony A6500
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y Sony A7R II
Sony A7S II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y Sony A7S II
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y Sony A7 II
Sony A99« »2359 Y 3.0 1229 full-flex n 8000 6.0 n Y Sony A99
Sony A77« »2359 Y 3.0 921 full-flex n 8000 12.0 Y Y Sony A77

The reported shutter speed and shutter burst refer to the use of the mechanical shutter. In addition, both cameras feature an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (rolling shutter) or shooting under artificial light sources (flickering).

The A9 writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the GH5 uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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
Sony A9»YstereomonoYYmicro2.0YYYSony A9
Panasonic GH5«YstereomonoYYfull3.1Y-YPanasonic GH5
Nikon D500« »YstereomonoYYmini3.0YYYNikon D500
Olympus E-M1 II« »YstereomonoYYmicro3.0Y--Olympus E-M1 II
Panasonic G9« »YstereomonoYYfull3.0Y-YPanasonic G9
Panasonic G85« »YstereomonoY-micro2.0Y--Panasonic G85
Panasonic GH4« »YstereomonoYYmicro2.0YY-Panasonic GH4
Sony A7 III« »YstereomonoYYmicro3.1YYYSony A7 III
Sony A7R III« »YstereomonoYYmicro3.1YYYSony A7R III
Sony A6500« »YstereomonoY-micro2.0YY-Sony A6500
Sony A7R II« »YstereomonoYYmicro2.0YY-Sony A7R II
Sony A7S II« »YstereomonoYYmicro2.0YY-Sony A7S II
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
Sony A99« »YstereomonoYYmini2.0---Sony A99
Sony A77« »YstereomonoY-mini2.0---Sony A77

Both the A9 and the GH5 are recent models that feature in their makers' current product line-up. The GH5 replaced the earlier Panasonic GH4, while the A9 does not have a direct predecessor.

Review summary: Sony A9 vs Panasonic GH5

So what conclusions can be drawn? Is there a clear favorite between the Sony A9 and the Panasonic GH5? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Sony Alpha A9:

  • More detail: Offers more megapixels (24 vs 20.2MP) with a 11% higher linear resolution.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores substantially higher (15 points) in the DXO overall assessment.
  • Better low-light sensitivity: Requires less light for good images (2.1 stops ISO advantage).
  • Better video autofocus: Features on-sensor phase-detection for more confident movie autofocus.
  • Faster burst: Shoots at higher frequency (20 vs 12 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (127x96mm vs 139x98mm) and thus needs less room in the bag.
  • Longer lasting: Can take more shots (650 versus 410) on a single battery charge.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More modern: Is somewhat more recent (announced 3 months after the GH5).

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Arguments in favor of the Panasonic Lumix DC-GH5:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher movie framerates (4K/60p versus 4K/30p).
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1620k vs 1440k dots).
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • More affordable: Was introduced into a lower priced category (56 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in January 2017).

If the count of individual advantages (bullet points above) is taken as a guide, the A9 comes out slightly ahead of the GH5 (10 : 9 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.

A9 10:09 GH5

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the A9 or the GH5 handle or perform in practice. 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 (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Sony A9»HiRec89/1005/55/55/5 Apr 2017 4,499 i i Sony A9
Panasonic GH5«HiRec85/1004.5/55/55/5 Jan 2017 1,999 i i Panasonic GH5
Nikon D500« »HiRec91/1004.5/55/55/5 Jan 2016 1,999 i i Nikon D500
Olympus E-M1 II« »HiRec85/1004.5/55/54.5/5 Sep 2016 1,999 i i Olympus E-M1 II
Panasonic G9« »HiRec85/1005/55/55/5 Nov 2017 1,699 i i Panasonic G9
Panasonic G85« »HiRec84/1005/54.5/54.5/5 Sep 2016 899 i i Panasonic G85
Panasonic GH4« »HiRec85/1005/55/55/5 Feb 2014 1,499- i Panasonic GH4
Sony A7 III« »HiRec89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
Sony A7R III« »HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i Sony A7R III
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i Sony A6500
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
Sony A7S II« »Rec-4.5/55/55/5 Sep 2015 2,999 i i Sony A7S II
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
Sony A99« »-84/1004.5/5rev4.5/5 Sep 2012 2,799- i Sony A99
Sony A77« »91/10081/100-4.5/55/5 Aug 2011 1,999- i Sony A77

The review scores listed above should be treated 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. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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.

 

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. If you cannot find the camera you are interested in, please send me an email, and I will try to locate and add the respective data to the application.

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