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Panasonic GH4 vs Sony A99

The Panasonic Lumix DMC-GH4 and the Sony Alpha SLT-A99 are two digital cameras that were revealed to the public, respectively, in February 2014 and September 2012. The GH4 is a mirrorless interchangeable lens camera, while the A99 is a DSLR. The cameras are based on a Four Thirds (GH4) and a full frame (A99) sensor. The Panasonic has a resolution of 15.9 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 GH4
versus
Sony A99
Panasonic GH4   Sony A99
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Sony A mount lenses
15.9 MP – Four Thirds sensor 24 MP – Full Frame sensor
4K/30p Video 1080/60p Video
ISO 200-25,600 ISO 100-25,600
Electronic viewfinder (2359k dots) Electronic viewfinder (2359k dots)
3.0" LCD – 1036k dots 3.0" LCD – 1229k dots
Swivel touchscreen Fully flexible screen (no touchscreen)
12 shutter flaps per second 6 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
500 shots per battery charge500 shots per battery charge
133 x 93 x 84 mm, 560 g 147 x 111 x 78 mm, 812 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GH4 and the Sony Alpha SLT-A99? 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

An illustration of the physical size and weight of the Panasonic GH4 and the Sony A99 is provided 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 measures are rounded to the nearest millimeter.

Size Panasonic GH4 vs Sony A99
Compare GH4 versus A99 top
Comparison GH4 or A99 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 is notably larger (32 percent) than the Panasonic GH4. Moreover, the A99 is substantially heavier (45 percent) than the GH4. 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.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 1,499ebay.com
2.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799ebay.com
3.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099ebay.com
4.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
5.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999ebay.com
6.
 
Panasonic G85 128 mm 89 mm 74 mm 505 g 330 Y Sep 2016 899ebay.com
7.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
8.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 749ebay.com
9.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
10.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 749ebay.com
11.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299ebay.com
12.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 amazon.com
13.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
14.
 
Sony A7 127 mm 94 mm 48 mm 474 g 340 Y Oct 2013 1,699ebay.com
15.
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 1,399ebay.com
16.
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 1,999ebay.com
17.
 
Sony A900 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 2,999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GH4 was launched at a markedly lower price (by 46 percent) than the A99, 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

The size of the sensor inside a digital camera is one of the key determinants 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. 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 GH4 features a Four Thirds sensor and the Sony A99 a full frame sensor. The sensor area in the A99 is 279 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the GH4 has a native 4:3 aspect ratio, while the one in the A99 offers a 3:2 aspect.

Panasonic GH4 and Sony A99 sensor measures

With 24MP, the A99 offers a higher resolution than the GH4 (15.9MP), but the A99 nevertheless has larger individual pixels (pixel pitch of 5.96μm versus 3.76μm for the GH4) due to its larger sensor. However, the GH4 is a somewhat more recent model (by 1 year and 4 months) than the A99, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A99 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 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 GH4 are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.

The Panasonic Lumix DMC-GH4 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-A99 are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.

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.

GH4 versus A99 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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"). Of the two cameras under consideration, the A99 offers substantially better image quality than the GH4 (overall score 15 points higher). The advantage is based on 1.8 bits higher color depth, 1.2 EV in additional dynamic range, and 1 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
2.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
3.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
4.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
5.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
6.
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671
7.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
8.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
9.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
10.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
11.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271
12.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
13.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
14.
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
15.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
16.
 
Sony A850 Full Frame 24.4 6048 4032none23.812.2141579
17.
 
Sony A900 Full Frame 24.4 6048 4032none23.712.3143179
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Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GH4 provides a higher video resolution than the A99. 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. The GH4 and the A99 are similar in the sense that both feature an electronic viewfinder, which is helpful when framing images in bright sunlight. Moreover, their viewfinders offer an identical resolution of 2359k dots. The following table reports on some other key feature differences and similarities of the Panasonic GH4, the Sony A99, and comparable cameras.

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Core Features
# image 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 GH42359 n3.0 / 1036 swivel Y 1/8000s 12.0/s Y n
2.
 
Sony A992359 Y3.0 / 1229 full-flex n 1/8000s 6.0/s n Y
3.
 
Olympus E-M5 II2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
4.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
5.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
6.
 
Panasonic G852360 n3.0 / 1040 swivel Y 1/4000s 9.0/s Y Y
7.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
8.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
9.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
10.
 
Panasonic GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
11.
 
Panasonic GH31746 n3.0 / 614 swivel Y 1/4000s 6.0/s Y n
12.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
13.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
14.
 
Sony A72400 n3.0 / 1230 tilting n 1/8000s 5.0/s n n
15.
 
Sony A772359 Y3.0 / 921 full-flex n 1/8000s 12.0/s Y Y
16.
 
Sony A850optical Y3.0 / 922 fixed n 1/8000s 3.0/s n Y
17.
 
Sony A900optical Y3.0 / 922 fixed n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The GH4 has one, while the A99 does not. While the built-in flash of the GH4 is not very powerful, it can at times be useful as a fill-in light.

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 GH4 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 GH4 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 GH4 writes its imaging data to SDXC cards, while the A99 uses SDXC or Memory Stick PRO Duo cards. The A99 features dual card slots, which can be very useful in case a memory card fails. In contrast, the GH4 only has one slot. 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-GH4 and Sony Alpha SLT-A99 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Panasonic GH4Ystereo / monoYYmicro2.0YY-
2.
 
Sony A99Ystereo / monoYYmini2.0---
3.
 
Olympus E-M5 IIYstereo / monoY-micro2.0Y--
4.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
5.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
6.
 
Panasonic G85Ystereo / monoY-micro2.0Y--
7.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
8.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
9.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
10.
 
Panasonic GM1-stereo / mono--micro2.0Y--
11.
 
Panasonic GH3Ystereo / monoYYmini2.0Y--
12.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY
13.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
14.
 
Sony A7Ystereo / monoYYmicro2.0YY-
15.
 
Sony A77Ystereo / monoY-mini2.0---
16.
 
Sony A850Y- / ---mini2.0---
17.
 
Sony A900Y- / ---mini2.0---
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It is notable that the GH4 offers wifi support, while the A99 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Travel and landscape photographers will find it useful that the A99 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the GH4 and the A99 have been discontinued, but can regularly be found used on ebay. The A99 was replaced by the Sony A99, while the GH4 was followed by the Panasonic GH5. Further information on the features and operation of the GH4 and A99 can be found, respectively, in the Panasonic GH4 Manual (free pdf) or the online Sony A99 Manual.

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Review summary

So how do things add up? Which of the two cameras – the Panasonic GH4 or the Sony A99 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Panasonic Lumix DMC-GH4:

  • 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.
  • Faster burst: Shoots at higher frequency (12 vs 6 flaps/sec) to capture the decisive moment.
  • 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 (133x93mm vs 147x111mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 252g or 31 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More affordable: Was introduced into a lower priced category (46 percent cheaper at launch).
  • More modern: Is somewhat more recent (announced 1 year and 4 months after the A99).

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Reasons to prefer the Sony Alpha SLT-A99:

  • More detail: Has more megapixels (24 vs 15.9MP), which boosts linear resolution by 25%.
  • Better image quality: Scores substantially higher (15 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.8 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.2 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1 stops ISO advantage).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.71x vs 0.67x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1036k dots).
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been on the market for longer (launched in September 2012).

If the count of individual advantages (bullet points above) is taken as a guide, the GH4 comes out slightly ahead of the A99 (13 : 12 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.

GH4 13:12 A99

How about other alternatives? Do the specifications of the Panasonic GH4 and the Sony A99 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the GH4 or the A99. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GH45/5+ +..85/1005/55/5 Feb 2014 1,499ebay.com
2.
 
Sony A995/5....84/1004.5/54.5/5 Sep 2012 2,799ebay.com
3.
 
Olympus E-M5 II5/5+ +4.5/581/1005/55/5 Feb 2015 1,099ebay.com
4.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
5.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999ebay.com
6.
 
Panasonic G85..+ +..84/1005/54.5/5 Sep 2016 899ebay.com
7.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
8.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 749ebay.com
9.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
10.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 749ebay.com
11.
 
Panasonic GH35/5+ +..79/1004.5/54.5/5 Sep 2012 1,299ebay.com
12.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 4,499 amazon.com
13.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
14.
 
Sony A75/5+ +..80/1005/55/5 Oct 2013 1,699ebay.com
15.
 
Sony A775/591/100..81/100..5/5 Aug 2011 1,399ebay.com
16.
 
Sony A8503/5....75/100..4.5/5 Aug 2009 1,999ebay.com
17.
 
Sony A900..+ +..+ +4.5/55/5 Sep 2008 2,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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, please note that some of the review sites have changed their methodology and reporting over time.

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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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Panasonic GH4 vs Sony A99

    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 GH4 Sony A99
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Sony A mount lenses
    Launch Date February 2014 September 2012
    Launch Price USD 1,499 USD 2,799
    Sensor Specs Panasonic GH4 Sony A99
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.8 x 23.8 mm
    Sensor Area 224.9 mm2 852.04 mm2
    Sensor Diagonal 21.6 mm 43 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.9 Megapixels 24 Megapixels
    Image Resolution 4608 x 3456 pixels 6000 x 4000 pixels
    Pixel Pitch 3.76 μm 5.96 μm
    Pixel Density 7.08 MP/cm2 2.82 MP/cm2
    Moiré control Anti-Alias 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 - 25,600 ISO
    Image Processor Venus IX BIONZ X
    DXO Sensor Quality (score) 74 89
    DXO Color Depth (bits) 23.2 25.0
    DXO Dynamic Range (EV) 12.8 14.0
    DXO Low Light (ISO) 791 1555
    Screen Specs Panasonic GH4 Sony A99
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.67x 0.71x
    Viewfinder Resolution 2359k 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 1036k dots 1229k dots
    LCD Attachment Swivel screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GH4 Sony A99
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 12 shutter flaps/s 6 shutter flaps/s
    Shutter Life Expectancy200 000 actuations200 000 actuations
    Electronic Shutterup to 1/8000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GH4 Sony A99
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in no Wifi
    Near-Field Communication NFC built-in no NFC
    Geotagging no internal GPS GPS built-in
    Body Specs Panasonic GH4 Sony A99
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Panasonic DMW-BLF19 Sony NP-FM500H
    Battery Life (CIPA)500 shots per charge500 shots per charge
    Body Dimensions 133 x 93 x 84 mm
    (5.2 x 3.7 x 3.3 in)
    147 x 111 x 78 mm
    (5.8 x 4.4 x 3.1 in)
    Camera Weight 560 g (19.8 oz) 812 g (28.6 oz)
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